Escalator Field Guide

What this guide is

A plain-English field reference for working on escalators and moving walks. Built from the same three official documents that govern this equipment — the construction and maintenance code (A17.1ASME A17.1 — the U.S. Safety Code for Elevators and Escalators. Companion to CSA B44.-2016 / CSACSA — Canadian Standards Association; publisher of B44 (the Canadian elevator code), C22.1 (the Canadian Electrical Code), and many other Canadian standards. B44-16), the inspection guide (A17.2ASME A17.2 — the Guide for Inspection of Elevators, Escalators, and Moving Walks. Companion to A17.1. Tells inspectors HOW to verify each rule.-2017), and the safety code for existing units (A17.3ASME A17.3 — the Safety Code for Existing Elevators and Escalators. Sets the minimum retroactive safety level older units must still meet.-2008), with field experience folded in.

An escalator is governed by more than one document, and they don't all do the same thing. Knowing which book answers which question saves a lot of arguing on the job. This guide is written for two readers at once: the mechanic asking "what do I check?" and the building or facilities manager asking "what does this cost me if I get it wrong?"

1. The three books

B44 / A17.1 — how the equipment must be built and kept. This is the safety code (in full, A17.1ASME A17.1 — the U.S. Safety Code for Elevators and Escalators. Companion to CSA B44.-2016 / CSACSA — Canadian Standards Association; publisher of B44 (the Canadian elevator code), C22.1 (the Canadian Electrical Code), and many other Canadian standards. B44-16). Part 6 is the design-and-construction part — what the truss, the steps, the handrails, the balustrades and all the clearances must physically be (those rules are marked 🔵). Part 8 is the upkeep part — maintenance, inspection, alteration and testing over the unit's service life (marked 🟣). Part 6 covers escalators and moving walks. (ASME A17.1 and CSA B44 were harmonized in 2000 and, since the 2007 edition, have been published as one combined book — that's why you'll see it written "ASME A17.1 / CSA B44".)

A17.2 — how an inspector checks it. This is the Guide for Inspection of Elevators, Escalators, and Moving Walks (A17.2ASME A17.2 — the Guide for Inspection of Elevators, Escalators, and Moving Walks. Companion to A17.1. Tells inspectors HOW to verify each rule.-2017). It does not set new rules. It walks an inspector through how to verify each rule in A17.1/B44: what to measure, where to stand, what to operate. In this guide, every note drawn from it is marked 🟢.

A17.3 — the minimum an older escalator must still meet. This is the Safety Code for Existing Elevators and Escalators (A17.3ASME A17.3 — the Safety Code for Existing Elevators and Escalators. Sets the minimum retroactive safety level older units must still meet.-2008). Older units were built to whatever code was current the year they went in, so A17.3 sets a retroactive floor — the baseline safety level every existing unit must reach regardless of its age. Where its numbers differ from the current construction rules, we flag it as an Older units note.

The guide also points you to the external standards (NFPA 70, CSA C22.1, ANSI Z97.1 and others) that the code refers to but doesn't reproduce — those are marked 🟠.

2. How they fit together

A useful way to hold it in your head:

• A17.1 / B44 says what the escalator must be (and stay).
• A17.2 says how someone proves it still is.
• A17.3 says what an old one must never fall below.

When a new unit is designed and installed, it is measured against A17.1/B44. When any unit, new or old, is inspected, the inspector follows A17.2. When the unit is decades old and the question is "does this grandfathered escalator still pass," the answer lives in A17.3.

Heads up — what the colours mean Citations are colour-coded so you can see at a glance what kind of pointer you're following.

• 🔵 a rule inside Part 6 of A17.1 / B44 — e.g. "see 6.1.3.5"
• 🟣 Part 8 — maintenance, inspection, alteration and type tests
• 🟠 a standard outside the A17 series — e.g. CSACSA — Canadian Standards Association; publisher of B44 (the Canadian elevator code), C22.1 (the Canadian Electrical Code), and many other Canadian standards. C22.1CSA C22.1 — the Canadian Electrical Code. Referenced from 6.1.7.4.1 for all electrical work on the unit (in Canada)., NFPA 70
• 🟢 A17.2 — how an inspector verifies the rule

Three things worth knowing before we go further

• "It's grandfathered" is not always true. Some Part 6 rules apply retroactively through 🟣 Part 8.7 (Alterations). Covered in Chapter 9.
• The books are updated on cycles that aren't synced. This guide is built on A17.1-2016 / B44-16 and A17.2-2017. Newer editions of each exist and your jurisdiction may not have adopted them. When in doubt, ask your regulatory authorityRegulatory authority — the body with legal power to enforce the code in your jurisdiction. The code calls it 'AHJ.' See Appendix A. which edition applies to you.
• Outdoor units have extra rules (6.1.8 and 6.2.8). If your unit is exposed to weather, this matters.

3. How the source code is laid out

The construction rules in Part 6 of A17.1 / B44 are split into two big halves, one for each kind of equipment, and they mirror each other almost perfectly.

Section 6.1 — Escalators

Section 6.2 — Moving Walks

6.2.1 through 6.2.8 — the same eight buckets, applied to moving walks.

If you can find a rule for an escalator in 6.1.x, the equivalent rule for a moving walk lives at the same number under 6.2.x. That's the shortcut.

4. Where each topic lives — quick map

How the search bar works

There's a search box at the top of every page, and it does three things.

Ask it a question the way you'd say it out loud. Type "how much force to open the deck lid" and you get a plain-English answer, with the clause it came from printed underneath so you can check it or quote it.

Type a rule number on its own and it takes you straight there. If an inspection report says 6.1.6.3.13, type that and nothing else, and the guide jumps to it.

It knows the words people actually use on the job. Ask about a deck lid and it finds the access plate. You don't have to know the code's name for something to find it.

For Mechanics

What this means on the job. Part 6 is what an inspector is checking against. If you hear "the angle is over 30 degrees," they're looking at 6.1.3.1. If you hear "the loaded gapLoaded gap — the gap between step and skirt when 110 N (25 lbf) is applied sideways. Must be ≤ 5 mm (6.1.3.3.5). is wrong," they're looking at 6.1.3.3.5.

Get used to the 6.1.x.y.z numbering: the deeper you go, the more specific the rule. 6.1.3.5.6 is just about step demarcationStep demarcation — the yellow stripes on the back and sides of each step. Specified in 6.1.3.5.6. lines, the yellow stripes on the step nose. That's how granular this thing gets.

When you're stumped on a moving walk question, look up the same number under 6.2 first. Nine times out of ten the requirement is identical or nearly so.

Don't try to memorise Part 6. Learn the layout so you can find any rule in under a minute.

Critical reminder. A lot of what you'll actually do day to day lives in 🟣 Part 8, not Part 6: replacing parts, periodic tests, maintenance intervals. Part 6 tells you what the unit must be. Part 8 tells you what you must do to keep it that way.

Quick-find cheat sheet

For Building Managers

What this means for your building. Part 6 is the safety standard your escalators and moving walks were designed and installed to meet. Canadian provinces and territories adopt B44 through their elevator safety regulations, and most U.S. states either adopt A17.1 directly or reference it through their building code. Check with your regulatory authorityRegulatory authority — the body with legal power to enforce the code in your jurisdiction. The code calls it 'AHJ.' See Appendix A. (Appendix A) for which edition applies where you are. That determines your legal baseline.

When a contractor's inspection report cites a section like "6.1.6.3.5", that's a specific clause in Part 6. This guide translates those numbers into plain English so you can have a real conversation about what's being flagged.

Part 6 covers the equipment itself. The day-to-day things a building manager actually deals with, required maintenance, testing schedules, what counts as an alterationAlteration — a change beyond like-for-like maintenance. Triggers Part 8.7 conformance to current code on the changed portion., are in 🟣 Part 8, covered in Chapters 7, 8 and 9.

You don't need to read the code. You need to know enough to:

• read an inspection report and tell what's serious from what's cosmetic
• ask your contractor the right questions
• spot when something the public reports, a wobbly handrail or a step that sticks, is a code issue
• sign off on alteration work knowing what it triggers

Sources. ASMEASME — American Society of Mechanical Engineers; publisher of the A17 elevator and escalator safety code series. A17.1-2016 / CSA B44-16, Safety Code for Elevators and Escalators, Part 6 (pp. 222–245). All A17.1/B44 section numbers in this guide refer to the 2016 edition. ASME A17.2-2017, Guide for Inspection — Parts 7 and 8 (escalator external and internal), Parts 9 and 10 (moving walk). All 🟢 callouts are paraphrased from that source in original wording.