Code and standard reference
AS 1657 Stairs
Last reviewed · BuildMath editorial team
AS 1657 addresses fixed platforms, walkways, stairs, and ladders rather than ordinary residential stairs. Common planning checks include a stair angle between 20 and 45 degrees, consistent risers and goings, landings, handrails, and slip resistance. The standard is copyrighted; purchase or access the current edition and have the workplace design professionally verified.
Limit table
| Item | Limit or rule | Reference | Verification note |
|---|---|---|---|
| Application | Fixed industrial access | Scope | Do not substitute it for residential stair rules. |
| Stair angle | Common planning range 20°–45° | Stair geometry section | Verify the current purchased edition. |
| Risers and goings | Uniform within each flight | Stair geometry section | Measure finished surfaces. |
| Landings and access | Required where specified | Platforms and stairs sections | Check workplace use and fall exposure. |
| Handrails and guarding | Required by configuration and exposure | Guarding sections | Connection and load design also matter. |
How to use this code summary
- Confirm which code edition and local amendment applies to the project address.
- Measure the actual completed geometry, not only rough framing or nominal dimensions.
- Compare the calculator output with every relevant row and exception in the primary source.
- Escalate structural, accessibility, egress, guard, and fall-protection questions to the authority or qualified professional.
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Frequently asked questions
Is this the complete code text?
No. This is a focused planning summary with a direct primary-source link. Definitions, exceptions, local amendments, and adjacent sections can change how a limit applies.
Which edition should I use?
Use the edition adopted by the authority having jurisdiction for the project address, including local amendments.
Can the calculator certify compliance?
No. It can flag a value against a displayed planning limit, but approval belongs to the authority, designer, or qualified professional.
Why is the source linked?
The source link lets readers and answer engines distinguish a cited rule from an unsupported numerical claim.
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