Commercial Door Handing Chart: LH, RH, LHR and RHR

What are the key commercial door handing facts?

For a handed closer under Allegion’s published convention, a right hand reverse door uses a left hand closer. A left hand reverse door uses a right hand closer. That makes two of the four mappings an inversion, not a measured error rate: this commercial door handing chart gives you both the door label and the scoped closer label. Allegion, verified September 14, 2026.

• Two of the four door-to-closer mappings invert left and right: RHR → LH, and LHR → RH, under Allegion’s handed-closer convention. Calculated from Table 2; denominator is four label mappings, not installed doors. Sources: Allegion (S03). Verified September 14, 2026.

• One of QualityDoor.com’s four single-door panels has a caption that conflicts with its LH abbreviation and left-hinge/inward description. Observation of that page’s LH panel, not an error rate across the industry. Sources: QualityDoor.com (S10). Verified September 14, 2026.

• SDI 111D-24’s web graphic contains four single-door hands and four active-pair arrangements, including keyed-side labels. The graphic is an image; its labels are present and were inspected. Sources: Steel Door Institute (S01); Steel Door Institute (S02). Verified September 14, 2026.

• Five instruction formulations were coded in this 16-record comparison, including three on Allegion’s handing page. These are wording categories; two are pull-side variants, not five distinct physical sides. Sources: Allegion (S03); CDF Distributors (S14); CDI Doors (S16); BROSCO (S17). Verified September 14, 2026.

• Five non-reverse terms appear in the recorded terminology field: straight hand, regular hand, standard swing, standard bevel and standard handing. Count of distinct normalized field values in this compilation. Sources: Allegion (S03); Imperial USA (S11); Beacon Commercial Door & Lock (S13); CDF Distributors (S14). Verified September 14, 2026.

• Four reverse terms appear in the recorded terminology field: reverse, reverse swing, reverse bevel and reverse handing. Count of distinct normalized field values in this compilation. Sources: Allegion (S06); Allegion (S03); Imperial USA (S11); CDF Distributors (S14). Verified September 14, 2026.

• LCN 4010 and 4020 closers are described as sharing a closer body, but the 4020 plastic cover is handed and the 4010 plastic cover is non-handed. Named components in Allegion’s undated manufacturer comparison. Sources: Allegion (S04). Verified September 14, 2026.

• All four LCN series in the component table have handed metal covers, including the non-handed 4040XP. Denominator: 4040XP, 4010, 4020 and 4110 in the cited comparison—not all LCN models. Sources: Allegion (S04). Verified September 14, 2026.

• Hager’s 5100 Series specification lists non-handed operation and adjustable closer sizes 1 through 6. Named product specification; Hager’s page also identifies its St. Louis company location. Sources: Hager Companies (S18). Verified September 14, 2026.

• Allegion’s exit-hardware convention uses LHR and RHR opening labels, while Hager describes its exit devices as non-handed. Opening designation and device construction are separate facts. Sources: Allegion / iDigHardware (S08); Hager Companies (S19). Verified September 14, 2026.

• The 2021 IBC §1010.1.2.1 trigger is an occupant load of 50 or more, or Group H occupancy, for its covered doors. The required direction is egress travel; the provision does not choose a left/right hinge jamb. Sources: International Code Council (S29). Verified September 14, 2026.

• The IBC swing provision is §1008.1.2 in 2012 and §1010.1.2.1 in 2015; “room or area” wording is already present in 2012. Edition-specific ICC section excerpts, not a claim that the wording first appeared in 2015. Sources: International Code Council (S26); International Code Council (S27). Verified September 14, 2026.

• BHMA’s A156.115-2016 summary describes hardware-preparation dimensions; its preview is not an exhaustive audit of ANSI handing definitions. The reviewed evidence does not support claiming that no ANSI standard defines handing. Sources: ANSI / BHMA (S22); Builders Hardware Manufacturers Association (S23). Verified September 14, 2026.

• Missouri’s cited professional-conduct rule uses the 2018 IBC in its stated fallback scope; Illinois’s baseline framework took effect January 1, 2025. Different legal instruments with different scopes—not two uniform statewide handing rules. Sources: Missouri Secretary of State (S31); Illinois Capital Development Board (S35). Verified September 14, 2026.

By St. Louis Dock Door Repair Research. Last verified: September 14, 2026.

Scope note: This reference covers swinging commercial pedestrian doors and related hardware. The service-request line on this site covers commercial loading-dock and industrial-door equipment, not pedestrian-door service. Sectional, rolling steel, and high-speed industrial doors use different terminology and are outside this chart’s scope.

Compare the in-scope commercial dock and industrial-door service types.

This page publishes the four hands as text tables, adds the door-to-closer crosswalk, and compares 16 selected reference records to show where their wording, scope and instructions differ. It is a comparison of published documentation—not a survey of installed doors, purchasing mistakes or field practice.

Table of contents: Four hands · Reference side · Aliases · Door versus closer · Push-side shortcut · Active pairs · Special pairs · 16-reference comparison · Where to stand · Naming · Caption conflict · Hardware · Closer components · Lock preparation · Code and swing · Missouri and Illinois · Fire-rated doors · Opening record · What this shows · Methodology · Limitations · Questions · Sources · Citation details · Downloads.

How do you read the four hands in this commercial door handing chart?

The four single-leaf conditions covered here are left hand (LH), right hand (RH), left hand reverse (LHR) and right hand reverse (RHR). Read them from the designated reference side, using hinge position and whether the leaf swings away from you or toward you. The table below reconciles Allegion’s four labels with Imperial USA’s reverse-bevel aliases; it does not cover every special door arrangement. Sources: Allegion and Imperial USA.

Fix the reference side before you read the chart

Handing is ambiguous until you agree on where the observer stands. For this chart, stand on the designated outside or key side—the side from which keyed entry would be controlled. Here, “secure side” means that key-side reference; it does not mean the protected room on the other face. That distinction is stated in Allegion’s Handing 101.

An exterior wall is not required. An interior storeroom can have a key side even though both faces are indoors. For a passage opening without a key, use the outside/reference side established for the opening rather than silently substituting a different observer position. Reeb and Beacon likewise make the key-side reference explicit.

Once that side is fixed, record two facts: which jamb carries the hinges, and whether the leaf travels away from you or toward you. Do not change viewpoints between recording the hinges and recording the swing. “Hinges on the left” alone is not a four-hand designation.

The four hands

Source: Allegion’s handing definition and closer translation, Allegion’s Rev. 10/14 quick-reference sheet, and Imperial USA’s reverse-bevel chart. Documentation checked September 14, 2026. The closer column applies to the cited handed-closer convention, not every model or mounting arrangement.

Four-hand data and door-to-closer crosswalk — CSV · Complete reference data — JSON · Publication details.

The reverse conditions are where the labels stop matching the closer labels. A reverse door moves toward the observer on the designated key side. That is a statement about geometry and viewpoint—not, by itself, a finding about whether the door’s swing satisfies an egress requirement.

The code table answers a different question: when a covered door must swing in the direction of travel. Neither the occupant-load threshold nor the word “exit” selects the left or right hinge jamb. Keep those decisions separate in the record.

LHR or LHRB? Both, depending on who printed the chart

In the cited charts, LHR and LHRB describe matching hinge-and-swing geometry. So do RHR and RHRB. The difference is the added B for bevel, not an extra fifth or sixth standard single-door hand. Imperial USA uses the B suffix; Allegion’s reference sheet uses LHR and RHR.

That alias does not supply a bevel angle, a glazing orientation or permission to reverse a manufactured assembly. It is a translation between the labels in these records. Preserve the manufacturer’s exact catalog designation when a specification calls for one, and attach the reference-side information that makes the translation reproducible.

C.R. Laurence illustrates why the full designation matters: its own listing identifies DL1190LHRA as a left-hand-reverse-bevel rim configuration. The product description is evidence of that named configuration; it is not evidence that every DL1190 component has the same reversibility. C.R. Laurence product listing, checked September 14, 2026.

Why does a right hand reverse door take a left hand closer?

Under Allegion’s cited convention, the door designation is read from the key side and the handed closer can be identified from the push side. Those are opposite faces on a reverse opening, so the left/right result flips. This explains the published RHR-to-LH and LHR-to-RH mappings; it does not establish a universal order code for every closer. Allegion.

A chart that gives you four door labels has answered the door-label question. It has not yet identified the closer model, arm, cover or mounting arrangement. That is why the two-label closer result belongs beside the four-label door result rather than replacing it.

Source: Allegion, “How do I determine the hand of a door?”, checked September 14, 2026. This is a convention crosswalk, not a compatibility matrix. A non-handed closer does not acquire a handed body merely because the opening has a hand.

The two non-reverse conditions do not flip: the key side and push side are the same face. The reverse conditions do flip. Two of four mappings is the complete denominator behind the headline finding. It says nothing about the proportion of installed openings that are reverse or the frequency of wrong-part orders.

The push-side shortcut answers a different question

Allegion’s knowledge-base page includes key-side, push-side and pull-side instructions. Its final paragraph explicitly introduces the push-side instruction as a way to determine a door closer’s hand. The page therefore does identify that component distinction; it would be inaccurate to say the manufacturer never explains it. Allegion.

Work through the geometry as a paper example. An LHR opening has its hinges on the left and swings toward an observer on the key side. Its push face is opposite that observer. From the push face, the same hinge jamb appears on the right. The key-side classification is LHR; the push-side left/right result is RH.

Those are not competing measurements. They are labels produced by different reference rules. The mistake would be writing RH in the door-hand field when the intended four-hand system requires LHR, or treating RH as proof that a particular closer assembly is suitable.

This derivation uses the verified four-case records and reverses the viewing face. It is our explanation of the geometry, not a quotation from Allegion and not a claim that the manufacturer reports an ordering-error rate. The opening record below keeps the door label and component labels in separate fields for exactly this reason.

How are double doors handed when one leaf is active?

For a conventional pair with both leaves swinging the same direction and one identified active leaf, the published notation adds A to that active leaf’s hand. The four results are LHA, RHA, LHRA and RHRA. This table does not classify pairs with both leaves active or leaves swinging in opposite directions. Allegion’s Handing 101 and Trudoor.

Identify the active leaf before using left or right. The active leaf carries the operative lock/latch in the arrangement described by the cited reference; the other leaf is commonly secured with flush bolts. A drawing’s left leaf is not automatically its active leaf. Imperial USA also publishes separate active-pair arrangements.

Source: Allegion/iDigHardware, Trudoor, and Imperial USA. Checked September 14, 2026. “Left” and “right” refer to the active leaf as viewed from the same designated reference side throughout.

Active-pair handing — CSV.

Both-active and double-egress pairs need their own record

Some pairs have no inactive leaf. Trudoor illustrates push-pull pairs, pairs with surface vertical rod exit devices on both leaves, and pairs with rim devices against a removable mullion. Those arrangements cannot be reduced to a table that requires one inactive and one active leaf. Trudoor’s paired-door reference.

Double-egress pairs are a separate case: the two leaves swing in opposite directions. The opening, frame and exit-hardware notation need their own scope; they are not automatically interchangeable. Allegion’s explanation distinguishes the door/frame designation from the panic-hardware designation in its double-egress example. Allegion’s Handing 101.

Hager’s 5100 documentation lists Double Egress Hold Open Track Arm and Double Egress Non-Hold Open Track Arm options. Their presence in the catalog demonstrates a separately documented configuration, not universal compatibility with every double-egress opening. Record each leaf, the actual hardware option and the applicable manufacturer document rather than converting the pair with the one-active-leaf table. Hager 5100 specifications.

Where do the published handing references disagree?

The comparison contains 16 selected reference records, including charts, a technical-manual excerpt, a residential/commercial comparison and an ANSI/BHMA scope reference. We recorded viewpoint instructions, terminology, abbreviations, pair coverage, format and verification depth. The records show why a label must travel with its reference rule; they are not 16 independent publishers or a census of all available charts.

Source: each record’s named publisher and linked primary document; full titles, document vintages and access notes appear in the source register. Checked September 14, 2026. ★ means the relevant primary content, including graphics where needed, was read directly. ● means the stated field was checked against an indexed excerpt of the primary document, not the complete document. The Steelcraft row does not assign values to uninspected pair diagrams.

Sixteen-reference comparison — CSV. The export includes the individual source URLs, field-level scope notes, check dates and the controlled terms used for the counts below.

A blank terminology array in the download means that no generic term was assigned from the inspected material. It does not mean the publisher never uses such a term anywhere. “Not evaluated” in a pair field is likewise not evidence that a publisher has no paired-door guidance.

Five instruction formulations—not five distinct physical sides

The recorded instructions normalize to five formulations: outside/security/key side; push side with hinge position; pull side with hinge position; back against the hinge side; and pull side with knob position. The last two pull-side descriptions differ in the feature the observer reads, not necessarily in where that observer is physically located. This is an editorial coding of the recorded wording, not five industry standards.

Three formulations appear in Allegion’s knowledge-base article. CDF and CDI also describe a back-to-hinges approach. BROSCO’s residential instruction uses the pull side and knob position, but that same BROSCO page also supplies a commercial chart with reverse hands. It cannot accurately be classified as a residential-only two-hand reference. Allegion, CDF, CDI, BROSCO.

The comparison does not endorse every shortcut as a complete four-hand test. A method that returns only left or right has not, on its own, supplied the reverse condition. Pair status and component scope remain additional inputs rather than hidden assumptions.

Five recorded names for non-reverse, four for reverse

The non-reverse terminology field contains straight hand, regular hand, standard swing, standard bevel and standard handing. The reverse field contains reverse, reverse swing, reverse bevel and reverse handing. These are distinct text values in this compilation; case and surrounding punctuation are normalized, while different words remain different values.

Allegion’s knowledge base supplies straight hand and reverse swing. Imperial USA supplies regular hand and reverse bevel. Beacon supplies standard swing/standard bevel and reverse swing/reverse bevel. CDF adds standard handing and reverse handing. Those primary records support the complete five-and-four count without depending on unseen pages of the Steelcraft manual. Sources: S03, S11, S13 and S14 in the source register.

The Steelcraft excerpt independently records regular hand and reverse swing; Allegion’s quick-reference sheet uses reverse. That is variation within related documentation, not evidence that one word is the only valid description. The diagrams and observer rule settle the geometry; the words document how a particular publisher expresses it.

This count deliberately excludes full labels such as “right hand reverse bevel,” product names and every word in a user comment. Changing that coding rule would change the count. The exported arrays and build script make the rule inspectable instead of leaving the headline number to interpretation.

One live chart has a mismatched caption

QualityDoor.com’s LH panel contains a specific internal conflict: “Right Hand Reverse” appears in its written-out caption while its abbreviation is LH and its adjacent geometry describes left hinges with an inward swing. The abbreviation and geometry agree with a left-hand condition under that page’s outside-reference rule. The written-out caption does not. QualityDoor.com, checked September 14, 2026.

Source: QualityDoor.com, Door Handing Guide, checked September 14, 2026. The table paraphrases the geometry and consistency assessment; the conflicting three-word caption is quoted above. This dated observation may cease to describe the live page after a correction.

The point is not that every published chart is unreliable. It is that a picture, abbreviation and written label should be checked against each other. The shared wording visible on distributor charts does not establish who wrote a passage first, who copied whom, or whether this error propagated. This compilation makes none of those claims.

There is a second documented wording conflict worth keeping separate. Special-Lite’s reference-position paragraph associates toward/away motion with inswing/outswing terms differently from its later single-door descriptions. Rather than import the conflicting shorthand, this page records toward and away relative to the stated observer. Special-Lite, checked September 14, 2026.

Which door hardware is actually handed?

Handing is not one property shared by every component of an opening. Under the cited records, a door can be RHR, its handed closer LH, a lock chassis non-handed and a closer cover handed. The useful question is therefore which component, from which manufacturer, under which document? Allegion’s component comparison and Schlage’s ND specifications.

One closer, four component fields

Source: Allegion, “What is the difference between the 4040, 4010, 4020, and 4110 series closers?”, checked September 14, 2026. The inspected web document is undated. These are named model/component records, not rules for every closer produced by LCN or another manufacturer.

Two findings fall out of that table. The 4010 and 4020 are described as sharing a closer body, but their plastic-cover handing differs. All four listed series have handed metal covers, including the non-handed 4040XP. The manufacturer’s comparison supports both findings; it does not establish a universal explanation for why every cover is designed that way.

Allegion separately states that the 4010 is handed and not field reversible. That is a model-specific restriction, not a basis for classifying every handed closer as irreversible. Allegion’s 4010 answer.

For contrast, Hager lists the 5100 Series Grade 1 surface closer as non-handed, with adjustable sizes 1 through 6 and its stated BHMA/ANSI A156.4 certification. The same company page lists a St. Louis address, 139 Victor Street, Saint Louis, Missouri. That is a local manufacturer reference—not a claim that handing conventions change at the Missouri border. Hager 5100 specifications and company details.

LCN component matrix — CSV, 16 component records.

The separate fields are the point. Reading “non-handed” in the body field cannot fill in the arm or cover fields. Nor does the existence of handed accessories turn a manufacturer’s non-handed-body statement into an error. Both statements can be true at the same time.

When a non-handed lock preparation stops answering the whole question

A cylindrical lock preparation and a completed door assembly are not the same object. Allegion’s explanation pairs LH with RHR and RH with LHR for the matching cylindrical preparation. Schlage independently describes the ND Series chassis as non-handed. Neither statement determines every other opening component. Allegion’s preparation discussion and Schlage ND.

Add glazing, a sidelite or a louver and an additional orientation can matter. SDI 111C-24 places detachable louver moldings on the room/non-security side and notes that a louver in a nonhanded door can require reversal to suit the actual hand. That is a documented louver condition—not a statement that every glazed door is a different product whenever its swing changes. SDI 111C and 111J.

SDI 111J-25 addresses non-labeled exterior glazing. For a lite kit, record the manufacturer’s glazing-system details rather than copying the louver rule into a universal glazing rule. The glass, stop, door and frame are separate specification items. A symmetric bored-lock preparation is not proof that the complete glazed opening can be turned around.

Source: the named manufacturer documents in each row; BHMA’s index for the related product-standard categories, and SDI for its component guidance. Checked September 14, 2026. A related-standard entry does not mean that the standard supplies the row’s handing rule or establishes certification for every product listed.

The Von Duprin row preserves a verified copyright-2004 catalog example, specifically the 9875-F/9975-F fire-exit device. Its -2 and SS exceptions cannot be silently promoted into a current rule for every 9975 variant. Likewise, the SARGENT row is the October 2021, function-42 record—not a statement that all mortise locks or all current 8200 functions share that restriction.

These historical examples are kept because they expose a useful specification problem: a model family, a function and an option can carry different restrictions. Their dates are part of the fact, not a footnote that can be discarded when the fact is reused.

Four manufacturers can publish different handing treatments within the exit-device category without any contradiction in the underlying chart. The device body, order configuration and outside trim are different objects. “Is a rim exit device handed?” therefore needs a manufacturer and model before it has a dependable product-level answer.

Hardware handing matrix — CSV. Each row retains its source URLs, component scope, historical status and check date. This file contains 13 category/model records; it is not an exhaustive hardware catalog.

When does the building code determine the swing direction?

The IBC’s direction-of-swing provision requires covered doors to swing in the direction of egress travel at an occupant load of 50 or more, or for Group H occupancy, within the section’s scope. That rule does not choose the left or right hinge jamb, and it does not define the key-side observer. A reverse label follows only when the required swing moves toward the observer on the designated reference side. ICC’s 2021 and 2024 provisions.

The threshold is a swing-direction rule, not a universal panic-hardware trigger. This table records a narrow piece of model-code history. It does not determine whether a specific project falls under a particular edition, an exception, an existing-building provision or a local amendment.

Source: International Code Council, the linked edition-specific Chapter 10 or section records above, checked September 14, 2026. ● identifies verification against the issuer’s indexed section excerpts; complete chapter retrieval was restricted. The table records only the confirmed section, threshold and wording distinction, not an exhaustive legal comparison.

The consequential history correction is straightforward: the 2012 text already refers to a room or area containing the occupant load. That wording was not first introduced when the section became 1010.1.2.1 in 2015. The 2009 record uses the earlier door-serving-load formulation. ICC 2012 §1008.1.2 and ICC 2009 Chapter 10.

A bare reference to 1008.1.2 therefore does not prove a specification is wrong; it may refer to an earlier edition. Conversely, finding the newer section number does not establish that its edition was adopted for the project. Record the code name, year and section together, rather than converting a section number without preserving its edition.

Balanced doors are expressly included in the inspected 2021 wording. This compilation does not assign a first-ever introduction date for that term across every code publication, supplement or amendment. The six-row table should not be used to manufacture a change-history claim it was not built to prove.

IBC edition and swing-section ledger — CSV, six rows.

Which swing-rule reference applies on each side of the Mississippi?

The code reference must follow the adopting jurisdiction and the project’s scope, not the website’s home city. The City of St. Louis publishes a 2018 IBC adoption; St. Louis County identifies its building code as 2015 IBC with amendments. Illinois’s framework effective January 1, 2025 also distinguishes covered work without a locally adopted code from jurisdictions that have adopted their own codes. City, County, Illinois Capital Development Board.

Source: Missouri Secretary of State, 20 CSR 2030-2.040; City of St. Louis Building Division; St. Louis County’s current code index and county-produced ordinance convenience copy; Illinois Capital Development Board. Checked September 14, 2026. Model section pointers are not representations that every local amendment has been reviewed.

The City of St. Louis is an independent city, not part of St. Louis County. Its ordinances cannot simply be assigned to a county municipality because the project’s postal address includes “St. Louis.” The City itself identifies the County as a separate government. City government structure.

The County’s published adoption record is Ordinance 27,654, approved December 18, 2019, with the convenience copy identifying an April 1, 2020 effective date. That copy expressly calls itself unofficial. The current County index and the adoption text are used together; neither establishes a uniform code for every municipality without checking the applicable adoption and administrative arrangement. County-produced copy, opening provisions.

The Missouri professional-conduct rule is narrower than a statewide building-code adoption. 20 CSR 2030-2.040 gives the licensing board a 2018 IBC evaluation criterion when no local building code exists. It does not, by its own terms, turn this ledger into a statewide permit determination. This page makes no claim that every building type is free of other statewide requirements. Missouri’s rule, PDF page 3.

Illinois needs two statutory references, not one. The Capital Development Board places the no-local-code and state-funded framework under 20 ILCS 3105/10.09-1, using the current or immediately preceding IBC/IEBC edition for covered work, with the scope and exclusions stated by the agency. Its separate explanation of 10.18 concerns the minimum structural provisions for locally adopted codes. That second rule is not proof that every Illinois jurisdiction uses one uniform egress-code edition. Illinois Capital Development Board.

The grouped Madison, St. Clair, Monroe, Clinton and Bond entry is a regional scope reference to that state framework. It is not five independently verified county adoption records. The download keeps that distinction visible instead of turning a conditional state rule into a map of local ordinances.

Missouri–Illinois swing-rule ledger — CSV, eight scoped records.

Can the hand of a fire-rated door be changed?

Not on the authority of a handing chart. A proposed change must be assessed against the actual listed assembly, the manufacturer’s instructions and the applicable requirements. Intertek’s published guidance calls for listing-agency review of modifications beyond allowed job-site preparations, with manufacturer consultation before field changes. Intertek, published by the Steel Door Institute.

The distinction is between an allowed preparation and a modification that needs further evaluation—not between a convenient change and an inconvenient one. A different hand can involve the door, frame, hardware and glazing configuration. This page cannot determine whether the exact proposed change is permitted from the letters LH, RH, LHR or RHR alone.

Intertek describes possible outcomes including an engineering evaluation, additional testing, a field visit or replacement of the affected component. It does not say that every handing question automatically requires a new assembly. The manufacturer and the listing laboratory named on the certification must evaluate the proposed configuration; the authority having jurisdiction determines acceptance for the project. Intertek’s field-modification guidance.

Two label points also need to remain separate. First, an illegible or missing label is an identification and acceptance issue that needs resolution; a chart cannot restore it. Second, paint on a label does not automatically erase a rating: UL specifically permits paint on an embossed fire-door-frame label when the required information remains legible. UL distinguishes those labels from non-embossed printed metal or Mylar labels, which should not be painted. UL Solutions, May 7, 2019; verified September 14, 2026.

Closing and latching performance cannot be inferred from a legible label alone. A listed configuration still has to function as required; the Intertek guidance identifies component and clearance defects that can prevent proper closing or latching. “No protection whatsoever” is not a measured conclusion this reference can assign to an uninspected opening.

This is work for the manufacturer, the listing laboratory and the authority having jurisdiction. The record below captures identification and documents; it is not a set of instructions for rehanding, drilling, machining, moving hardware or altering a fire-door assembly.

What should an opening record capture?

Record the inputs, not just the conclusion. A second reader should be able to reconstruct the reference side, hinge position, travel direction and component scope without guessing where the first observer stood. The blank record below is an organization aid derived from the fields used in this compilation.

Source: St. Louis Dock Door Repair Research, derived from the documented fields and distinctions in Tables 1–8; created September 14, 2026. The blank entry cells are intentional.

The record does not replace an approved door schedule, a hardware submittal or a professional assessment. Nor does filling it out certify a product’s listing or a project’s code compliance. Its job is narrower: to preserve what was observed, which convention was used and which document supports the resulting label.

An unresolved input should remain unresolved in the record. For example, an unidentified active leaf is not a reason to choose the left leaf by default. A model number without an option suffix is not a complete statement about an option-specific restriction. Those are missing inputs, not new handing categories.

What does this page show, and what does it not show?

It compares published reference records, not the frequency of real-world practice. The 16-record set was selected for its relevance to the draft’s terminology and component questions; it is not a random sample or an exhaustive census. All original counts on this page refer to those disclosed records or their fields.

The conventions themselves are the industry’s, not ours. What is original here is the join: reference side, hinge and swing geometry, door label, alias, scoped closer label, active-leaf notation, component-level exceptions, model-code section and jurisdictional scope. The download retains the boundaries between those fields instead of presenting them as a single universal rule.

A source can be authoritative about its own product or wording without settling another manufacturer’s terminology. A historical catalog can document a historical option restriction without proving that today’s version is unchanged. An adoption page can identify an edition without deciding every alteration on every opening in its jurisdiction.

The compilation makes no claim to be the first such reference ever published anywhere. Its original contribution is the particular structured comparison, explicit normalization rules and inspectable records supplied here. Reconstructing a single manufacturer’s fact is different from reproducing the cross-source join; both remain traceable to their respective sources.

How was this reference assembled and checked?

The research records were checked on September 14, 2026, then normalized into one structured dataset used for the tables and downloads. Primary publisher documents support the technical statements; official code and agency records support the legal-reference fields. Directly inspected content is distinguished from issuer-indexed excerpts, and historical documents retain their own dates.

What we collected. The 16-reference comparison covers selected material from the Steel Door Institute, Allegion and its named brands, door/hardware distributors, and the ANSI/BHMA preparation preview. Additional records cover the four-case door-to-closer translation, active pairs, four LCN closer series, 13 hardware category/model entries, six IBC editions and eight jurisdiction/scope entries. The latter are eight rows of different scope—not eight independently adopted local building codes.

Where from, and when. Every retained source appears below with a primary-document URL, document vintage when established, evidence location and access note. September 14, 2026 is the verification date, not the publication date of every source. The quick-reference sheet is Rev. 10/14; the Steelcraft manual is Book Rev. 09/26/24; the historical Von Duprin example carries a 2004 copyright; and the SARGENT example is an October 2021 catalog.

How the comparison was selected. This is a purposive set of records addressing the specific handing-confusion questions in the page. Two SDI sections and multiple Allegion documents are retained as separate records because their document formats and terminology are being compared. They are not treated as independent publishers or used to estimate market share, practice frequency or a probability of making an error.

How it was processed. Reference side, hinge side and travel direction are separate fields. Aliases are joined by the matching configuration in the cited charts, not by similar spelling alone. The handed-closer translation stays attached to the Allegion convention. Product records retain the model, function, option, component and vintage necessary to prevent a narrow statement from becoming an unsupported category-wide rule.

How the original counts were calculated. The two inversions are counted from the four door-to-closer records. The five instruction formulations are a controlled coding of the instructions recorded in Table 4. The five non-reverse and four reverse terms are distinct normalized text values in the designated terminology arrays. None of these counts measures installed doors, prevalence, purchase failures or the number of official industry standards.

Verification tiers. ★ means the relevant primary text, table or diagram was read directly. ● means the published field was checked against an indexed excerpt of the primary document while full retrieval was restricted or exceeded the reader’s size limit. An excerpt-level record is not represented as a full-document audit. It contains only what the accessible primary evidence supports.

Access limits, disclosed. The Steelcraft PDF’s complete contents exceeded the reading tool’s size limit; the recorded terminology and viewpoint came from its primary-document excerpts. The ICC edition entries were checked through issuer-indexed section excerpts, not complete purchased code books. St. Louis County’s current index was accessible at excerpt level, while the separate county-produced ordinance convenience copy was read directly. That copy labels itself unofficial and is not presented as certified codification.

Images were treated as evidence. SDI’s chart labels and BROSCO’s commercial graphic were inspected instead of being marked absent because they were not ordinary body text. Manufacturer PDF pages were inspected for the historical SARGENT and Von Duprin records and the PHG product specifications. The page does not reproduce those publishers’ artwork or claim an original diagram that is not supplied.

What the build checks. The included script verifies four-case coverage, the expected door/closer mapping, four active-pair records, the 16-reference count, the controlled term counts, all 16 LCN component entries and source-ID resolution. It regenerates the page’s data tables and CSV/JSON exports from the same records, checks internal anchor targets and download files, and verifies that the visible FAQ answers match their structured-data answers. Those are internal consistency checks, not a second physical inspection or product certification.

What refresh means. A future verification date should follow a real source review. A product revision, corrected chart caption, code adoption or source relocation can change a record; changing a calendar year alone cannot. A dated edition remains identifiable in the download path, and a substantive revision should receive a new edition rather than quietly overwriting the old findings.

What are the limits of this chart and its data?

This page identifies documented handing terminology. It does not determine whether a particular opening, hardware combination or proposed alteration is approved for its application. Product suitability, listing conditions and project-specific code acceptance require the applicable documents and responsible authorities; a label translation does not resolve them.

Specific exclusions and boundaries:

• Overhead and rolling doors are outside scope. This is a reference for the stated swinging pedestrian-door configurations. It does not classify sectional, rolling, high-speed-door or operator handedness, and it does not claim that those products lack their own handing terminology.
• The closer crosswalk is scoped to the cited convention. It is not a universal part-selection rule for non-handed bodies, concealed or floor closers, automatic operators, arms, covers or every mounting arrangement. Those products and configurations require their own documentation.
• Product rows describe named components and document versions. The four-series matrix describes the cited LCN comparison. The 2004 Von Duprin and 2021 SARGENT examples remain historical, and the undated PHG/trim extracts do not establish that every later variant is identical.
• Reference counts are not field statistics. The page contains no observed rate of wrong orders, no cost study and no count of installed doors by hand. It does not claim that no such dataset could exist elsewhere; none was collected for this project.
• Charts can be revised. The QualityDoor caption conflict and Special-Lite wording conflict are dated observations of particular pages. A later correction changes the live evidence and should be reflected in a new verification pass.
• Legal coverage is narrow. The code table records the identified model-code provision, not every exception or local amendment. The jurisdiction table does not assign one edition to all Missouri buildings, every St. Louis County municipality or every Illinois county. The County index and ICC records have the excerpt-level limitations stated in the methodology.
• Unassigned fields are not guessed. The comparison does not fill Steelcraft’s uninspected pair coverage, declare a first-ever introduction date for balanced-door wording, or assign handing behavior to unexamined hinges, electric strikes, electromagnetic locks, thresholds or gasketing. A related standard alone would not establish that behavior.
• Other national conventions and special assemblies are not classified. The reference does not translate DIN or other international systems. Both-active, double-egress and other special openings are identified as separate cases rather than forced into the single-active-leaf table.

What other commercial door handing questions does this reference answer?

The answers below use the same reference side, component boundaries and document dates as the tables. A short answer should not silently discard the condition that makes it correct.

What does “reverse” mean in door handing?

In this chart, the leaf swings toward the observer on the designated outside/key side. Reverse, reverse swing and reverse bevel describe that matching condition in the cited records; “outward” is meaningful only when the reference side is stated. Sources: Allegion (S03); Allegion (S06); Imperial USA (S11).

Is LHR the same as LHRB?

In the cited commercial charts, yes: LHR and LHRB describe matching left-hinge/reverse-swing geometry from the same reference side. Allegion uses LHR; Imperial USA uses LHRB. The alias does not establish product compatibility or field reversibility. Sources: Allegion (S06); Imperial USA (S11).

Can I determine handing from the hinge side alone?

No. The full four-hand result requires a designated reference side, hinge position as seen from that side, and whether the leaf travels toward or away. A left/right result alone does not distinguish non-reverse from reverse. Sources: Allegion (S03); Allegion (S06).

Why does an RHR door take an LH closer?

Under Allegion’s cited handed-closer convention, the key-side door classification and push-side closer classification use opposite faces on a reverse opening. RHR maps to LH and LHR maps to RH. This is a label crosswalk, not a universal closer-selection rule. Sources: Allegion (S03).

Which leaf determines the handing of a pair?

For the conventional one-active-leaf pair covered here, use the designated active leaf and the notation LHA, RHA, LHRA or RHRA. Both-active and double-egress configurations need their own records and cannot be classified by assuming an inactive leaf. Sources: Allegion / iDigHardware (S08); Trudoor (S09); Imperial USA (S11).

Does a non-handed lock mean the opening is non-handed?

No. A lock chassis or preparation is only one component. Schlage’s ND chassis is listed as non-handed, while the door, glazing system, closer, cover or trim can have separately documented orientation requirements. Sources: Schlage (S38); Allegion (S04); Steel Door Institute (S01).

Is there an ANSI standard that defines door handing?

This review does not establish an exhaustive answer for the ANSI/BHMA series. The inspected A156.115-2016 preview and BHMA scope summary concern hardware-preparation dimensions and include handed/non-handed preparation topics. They do not support a blanket claim that no ANSI standard contains handing definitions. Sources: ANSI / BHMA (S22); Builders Hardware Manufacturers Association (S23).

When does the code require a door to swing in the direction of egress?

The IBC provision recorded here uses an occupant load of 50 or more, or Group H occupancy, within its stated door and project scope. It appears at §1008.1.2 in the 2009 and 2012 records and §1010.1.2.1 in the 2015–2024 records. The applicable edition and amendments still have to be established, and the rule alone does not assign LH, RH, LHR or RHR. Sources: International Code Council (S25); International Code Council (S26); International Code Council (S27); International Code Council (S28); International Code Council (S29); International Code Council (S30).

Can the hand of a fire-rated door be changed?

Not on the authority of a handing chart. Intertek’s published guidance calls for manufacturer consultation and listing-agency evaluation of field modifications beyond permitted job-site preparations. Acceptance depends on the proposed listed configuration and the authority having jurisdiction, not merely a new handing label. Sources: Intertek, published by Steel Door Institute (S36).

Does this chart apply to overhead dock doors?

No. It covers the stated swinging pedestrian-door configurations, not sectional, rolling, high-speed-door or operator handedness. Those products require their own manufacturer terminology and documentation.

Which primary sources support the chart and the comparison?

The register below identifies the publisher’s document, its own vintage where established, the evidence used and the September 14, 2026 verification date. A source link is not a claim that the entire document was reviewed: the entry states when only a preview, historical extract or issuer-indexed excerpt supports the published field.

S01. Steel Door Institute — SDI 111: Recommended Details for Standard Steel Doors, Frames, Accessories and Related Components. Document vintage: 111A/C/D-24; 111J-25. Verified September 14, 2026; ★. Evidence: 111A and 111D handing graphics; 111C louver installation notes; 111J glazing provisions. HTML and handing images inspected; image labels are part of the evidence. https://steeldoor.org/sdi-111/

S02. Steel Door Institute — Technical Data Series index. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: SDI 111 document descriptions. Primary document read directly. https://steeldoor.org/tech_data/

S03. Allegion — How do I determine the hand of a door?. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Door/closer translation; key-side, push-side and pull-side methods; final paragraph explicitly identifies closer determination. Primary document read directly. https://kc.allegion.com/kb/article/how-do-i-determine-the-hand-of-a-door/

S04. Allegion — What is the difference between the 4040, 4010, 4020, and 4110 series closers?. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Four model subsections: bodies, arms, plastic covers and metal covers. Primary document read directly. https://kc.allegion.com/kb/article/what-is-the-difference-between-the-4040-4010-4020-and-4110-series-closers/

S05. Allegion — Is the 4010 closer handed?. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Handed and not field reversible. Primary document read directly. https://kc.allegion.com/kb/article/is-the-4010-closer-handed/

S06. Allegion — Door Handing Quick Reference Sheet. Document vintage: Rev. 10/14; printed identifier 005169. Verified September 14, 2026; ★. Evidence: Single page: four configurations, Outside labels, printed footer. Official Canadian host; PDF text and page image inspected. Filename contains 105169; printed footer reads 005169. https://allegion.ca/content/dam/allegion-us-2/web-files/allegion/information-documents/Door_Handing_Quick_Reference_Sheet_105169.pdf

S07. Steelcraft — Doors and Frames Technical Data Manual. Document vintage: Book Rev. 09/26/24. Verified September 14, 2026; ●. Evidence: Handing paragraph: regular hand; reverse swing; outside reference. Publisher PDF indexed excerpts read; full retrieval exceeded the reading tool size limit. Unseen pair notation not assigned. https://www.steelcraft.com/content/dam/steelcraft/documents/Steelcraft_Tech_Data_Manual_105001.pdf

S08. Allegion / iDigHardware — Back-2-Basics: Handing 101. Document vintage: August 19, 2014. Verified September 14, 2026; ★. Evidence: Author text on key side, single leaves, active pairs, hardware conventions and cylindrical preparation; B alias explained in author reply. Primary document read directly. https://idighardware.com/2014/08/back-2-basics-handing-101/

S09. Trudoor — Door Handing Chart. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Four single hands; four active pairs; three both-active configurations. Primary document read directly. https://www.trudoor.com/pages/door-handing

S10. QualityDoor.com — Door Handing Guide. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: LH panel abbreviation, written-out caption and left-hinge/inward description; other single panels and pair notation. Primary document read directly. https://qualitydoor.com/pages/door-handing-guide

S11. Imperial USA — Door Handing Chart. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Outside viewpoint; regular hand/reverse bevel; RH/LH/RHRB/LHRB and active pairs. Primary document read directly. https://impusa.com/door-handing-chart/

S12. Reeb — Commercial Door Handing. Document vintage: Page updated October 21, 2024. Verified September 14, 2026; ★. Evidence: Key/secure-side rule and single/pair captions. Primary document read directly. https://learn.reeb.com/knowledge-base/commercial-door-handing/

S13. Beacon Commercial Door & Lock — How To Determine The Handing Of A Door. Document vintage: October 20, 2017. Verified September 14, 2026; ★. Evidence: Keyed-side rule; standard swing/standard bevel and reverse swing/reverse bevel; single/pair labels. Primary document read directly. https://beaconcdl.com/blogs/news/how-to-determine-the-handing-of-a-door/

S14. CDF Distributors — Door Handing Explained: A Beginner’s Guide to Door Swing Direction. Document vintage: May 29, 2026. Verified September 14, 2026; ★. Evidence: Outside-reference four-hand table; standard handing/reverse handing wording; back-to-hinges explanation. Primary document read directly. https://www.cdfdistributors.com/blog/post/door-handing-explained-a-beginners-guide-to-door-swing-direction

S15. Special-Lite — How to Determine Door Handing: A Comprehensive Guide. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Outside viewpoint and single/pair labels; toward/away terminology conflicts with subsequent descriptions. Primary document read directly. https://special-lite.com/how-to-determine-door-handing-a-comprehensive-guide/

S16. CDI Doors — Door Swing Chart (Door Handing Guide). Document vintage: April 15, 2025. Verified September 14, 2026; ★. Evidence: Thirteen-entry model; explicit non-official-standard qualification; key-side and back-to-hinge discussion. Primary document read directly. https://cdidoors.com/door-swing-chart-door-handing-guide/

S17. BROSCO — Door Handing. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Residential pull-side/knob instruction and separate commercial handing graphic. HTML and https://www.brosco.com/wp-content/uploads/2018/09/Commercial-handing-1.gif inspected. https://www.brosco.com/resource-center/homeowner-resources/door-handing/

S18. Hager Companies — 5100 Series General Information. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Non-handed specification; adjustable sizes 1–6; BHMA/ANSI A156.4 certification statement; optional double-egress track arms; St. Louis contact location. Primary document read directly. https://www.hagerco.com/door-controls/5100-series-grade-1/5100-series-closer-general-information/5100-series-general-information

S19. Hager Companies — Exit Devices. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Manufacturer describes its exit devices as non-handed. Primary document read directly. https://www.hagerco.com/products-portal/exit-devices

S20. Philadelphia Hardware Group — Advantage Exit Devices catalog. Document vintage: Revision date not printed in inspected evidence; filename includes 2023. Verified September 14, 2026; ★. Evidence: 8800/F8800 and 8900/F8900 specification page, PDF page 12. Manufacturer-authored exhibitor literature; cover and specification-page images inspected. https://www.buildersshow.com/assets/docs/ibs/logos/ExhibitorProductLit_205993_ExitDevices2023_24Pweb.pdf

S21. C.R. Laurence — Panic-device product listing: DL1190LHRA. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: DL1190LHRA listed as left-hand-reverse-bevel rim configuration. Manufacturer listing inspected; individual product detail request was refused. https://www.crlaurence.com/products/brands/listing/D12FA_DW

S22. ANSI / BHMA — ANSI/BHMA A156.115-2016 preview. Document vintage: 2016. Verified September 14, 2026; ★. Evidence: Preview and table of contents only; handed/non-handed preparation topics are present. Preview PDF and page image inspected; not a review of the complete standard or entire A156 series. https://webstore.ansi.org/preview-pages/BHMA/preview_ANSI+BHMA+A156.115-2016.pdf

S23. Builders Hardware Manufacturers Association — A156.115-2016 Hardware Preparation in Steel Doors and Frames: Hardware Highlights. Document vintage: 2016 standard summary. Verified September 14, 2026; ★. Evidence: Dimensional preparation scope and common configurations. Primary document read directly. https://buildershardware.com/ANSI-BHMA-Standards/Hardware-Highlights/A156115-2016-Hardware-Preparation-in-Steel-Doors-and-Frames

S24. Builders Hardware Manufacturers Association — Hardware Highlights / ANSI-BHMA standards index. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Product-category mapping: A156.2 bored locks; A156.3 exit devices; A156.4 closers; A156.13 mortise locks. Related standards are category references, not proof of a product’s handing or certification. https://buildershardware.com/ANSI-BHMA-Standards/Hardware-Highlights

S25. International Code Council — 2009 International Building Code, Chapter 10. Document vintage: 2009 model-code edition. Verified September 14, 2026; ●. Evidence: 1008.1.2: door serving load of 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/content/IBC2009P13/chapter-10-means-of-egress

S26. International Code Council — 2012 International Building Code, Chapter 10. Document vintage: 2012 model-code edition. Verified September 14, 2026; ●. Evidence: 1008.1.2: room or area containing load of 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/s/IBC2012P13/chapter-10-means-of-egress/IBC2012P13-Ch10-Sec1008.1.2

S27. International Code Council — 2015 International Building Code, Chapter 10. Document vintage: 2015 model-code edition. Verified September 14, 2026; ●. Evidence: 1010.1.2.1: pivoted or side-hinged; room or area; 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/content/IBC2015/chapter-10-means-of-egress

S28. International Code Council — 2018 International Building Code, Chapter 10. Document vintage: 2018 model-code edition. Verified September 14, 2026; ●. Evidence: 1010.1.2.1: pivoted or side-hinged; room or area; 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/s/IBC2018P6/chapter-10-means-of-egress/IBC2018P6-Ch10-Sec1010.1.2.1

S29. International Code Council — 2021 International Building Code, Chapter 10. Document vintage: 2021 model-code edition. Verified September 14, 2026; ●. Evidence: 1010.1.2.1: side-hinged, pivoted and balanced; room or area; 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/s/IBC2021P1/chapter-10-means-of-egress/IBC2021P1-Ch10-Sec1010.1.2.1

S30. International Code Council — 2024 International Building Code, Chapter 10. Document vintage: 2024 model-code edition. Verified September 14, 2026; ●. Evidence: 1010.1.2.1: direction of swing; 50 or more or Group H. Issuer-indexed section excerpts verified. Full chapter retrieval was restricted; no exhaustive exception or amendment review claimed. https://codes.iccsafe.org/s/IBC2024P1/chapter-10-means-of-egress/IBC2024P1-Ch10-Sec1010.1.2.1

S31. Missouri Secretary of State — 20 CSR 2030-2.040: Evaluation Criteria for Building Design. Document vintage: Rule amendment effective July 30, 2020. Verified September 14, 2026; ★. Evidence: PDF page 3; professional-conduct evaluation against 2018 IBC absent local code; does not include later amendments. Primary document read directly. https://www.sos.mo.gov/cmsimages/adrules/csr/current/20csr/20c2030-2.pdf

S32. City of St. Louis Building Division — Building Codes Adopted by the City. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: 2018 IBC, Ordinance 70794; 2018 IFC, Ordinance 70796; adoption August 1, 2018. Primary document read directly. https://www.stlouis-mo.gov/government/departments/public-safety/building/building-codes.cfm

S33. St. Louis County — Codes and Ordinances. Document vintage: Undated. Verified September 14, 2026; ●. Evidence: County’s indexed listing identifies Chapter 1115 as 2015 IBC. Current county index excerpt read; direct page request restricted. County-produced adoption text also checked at S34. https://stlouiscountymo.gov/st-louis-county-departments/transportation-and-public-works/codes-and-ordinances/

S34. St. Louis County; copy hosted by City of Pagedale — 2015 Building / Existing Building / Residential Code: user-friendly copy. Document vintage: Ordinance 27,654 approved December 18, 2019; effective April 1, 2020. Verified September 14, 2026; ★. Evidence: Opening pages: 1115.020 adopts 2015 IBC with amendments; 1115.030 application and municipal adoption/contract provisions. County-produced convenience copy, expressly unofficial; hosted in an official municipal document system. Not presented as certified codification. https://public.powerdms.com/Pagedale/documents/2893041/2015%20Building-Exist%20Bldg-Residential%20Code%20User%20Friendly

S35. Illinois Capital Development Board — Building Codes and Regulations. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: January 1, 2025 effective date; 20 ILCS 3105/10.09-1 no-local-code/state-funded scope; 10.18 local structural baseline; Public Act 103-0510. Primary document read directly. https://cdb.illinois.gov/business/codes/buildingcodesregulations.html

S36. Intertek, published by Steel Door Institute — Common Field Issues Affecting Fire Doors & Frames. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Intertek-authored field-modification guidance; listing-agency review and manufacturer consultation; label identification. Primary document read directly. https://steeldoor.org/common-field-issues-fire-doors-frames/

S37. UL Solutions — Q&A: Fire Door Frames Label Considerations. Document vintage: May 7, 2019. Verified September 14, 2026; ★. Evidence: Embossed frame labels may be painted if legible; non-embossed printed/Mylar labels should not be painted. Primary document read directly. https://www.ul.com/news/qa-fire-door-frames-label-considerations

S38. Schlage — ND Series Grade 1 Cylindrical Locks. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Technical specifications: chassis, non-handed. Primary document read directly. https://commercial.schlage.com/en/products/mechanical-locks/nd-series-grade-1-cylindrical-locks.html

S39. SARGENT / ASSA ABLOY — 7800/8200 Series Mortise Locks catalog, document 90115. Document vintage: October 2021. Verified September 14, 2026; ★. Evidence: Printed page 23 / PDF page 23: 8200 function 42, handed and not field reversible. Historical manufacturer catalog; page image inspected. No assertion of equivalence to all current variants. https://www.assaabloy.com/hk/en/product-assets/mechanical-lock/sargent/assets/documents/SARGENT_Mortise_Lock_78008200_Series_Catalog.pdf

S40. Von Duprin / Ingersoll-Rand — 9875-F/9975-F Mortise Lock Fire Exit Device catalog cut. Document vintage: Copyright 2004. Verified September 14, 2026; ★. Evidence: Printed page 10: non-handed except -2 double-cylinder or SS signal-switch options. Historical manufacturer-authored catalog cut hosted by Openings Studio; page image inspected. Current option equivalence not established. https://www.openingsstudio.com/AAOS/res/ASSA%20ABLOY/CatalogCuts/Von%20Duprin/ED/9875-F_9975-F_Mortise%20Functions%20Trims.pdf

S41. Von Duprin — 98/99 Series catalog extract, XP rim devices and trim. Document vintage: Undated manufacturer catalog extract. Verified September 14, 2026; ★. Evidence: Printed page 13: 996L-R/V, 996L-NL-R/V, 996L-BE-R/V and 996L-DT trim listed handed/reversible. Manufacturer-authored catalog extract hosted by distributor; page image inspected; not a current full-series option audit. https://objects.eanixter.com/PD511588.PDF

S42. City of St. Louis — City Government Structure. Document vintage: Undated. Verified September 14, 2026; ★. Evidence: Independent city, not part of any county; St. Louis County separate government. Primary document read directly. https://www.stlouis-mo.gov/government/about/city-government-structure.cfm

What are the publication details for a citation?

These details identify the reference and the dataset edition described on this page. September 14, 2026 is the documentation-check date; historical source dates remain attached to their individual records.

Publication: St. Louis Dock Door Repair Research Title: Commercial Door Handing Chart: LH, RH, LHR and RHR URL: https://stlouisdockdoorrepair.com/research/commercial-door-handing-chart/ Dataset edition: 1.0.0 Last verified: September 14, 2026

What is included in the downloadable dataset?

The September 14, 2026 edition contains the comparison records, geometry/closer mapping, active-pair table, hardware and component matrices, code/jurisdiction ledgers, and source register. CSV files provide separate tables; the JSON file retains the structured arrays and provenance together.

Complete dataset — ZIP · Complete dataset — JSON.

Source: St. Louis Dock Door Repair Research, compiled from the cited primary records; edition 1.0.0, September 14, 2026. The downloads contain normalized reference data, not copies of the manufacturers’ full catalogs or code books. No registration or email is required.

By St. Louis Dock Door Repair Research. Last verified: September 14, 2026.

St. Louis Dock Door Repair Research is the independent research and reference section of stlouisdockdoorrepair.com.