OSHA Compliant Stairs: Our OSHA compliance
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OSHA requirements for alternating tread stairs

General stair requirements §1910.25(b)

Compliant fall protection
Uniform riser heights and tread depths ❷❸

Alternating tread stair requirements §1910.25(c)

Slope between 50° and 70° from the horizontal
Minimum tread depth of 8.5”
Open risers if tread depth is less than 9.5”
Minimum tread width of 7”
Distance between handrails of 17” to 24”

Duty to provide fall protection 1910.28(b)

Handrails on both sides

OSHA classifies alternating tread stairs (alternating tread devices) as non-standard stairs and states they are acceptable to use in applications where it is not feasible to use standard stairs. §1910.25(b)(8)

Maximum safety, minimum space

Alternating tread stairs are safer and more comfortable than other space-saving devices.

OSHA requirements for alternating tread stairs

General stair requirements §1910.25(b)

Compliant fall protection
Uniform riser heights and tread depths ❷❸

Alternating tread stair requirements §1910.25(c)

Slope between 50° and 70° from the horizontal
Minimum tread depth of 8.5”
Open risers if tread depth is less than 9.5”
Minimum tread width of 7”
Distance between handrails of 17” to 24”

Duty to provide fall protection 1910.28(b)

Handrails on both sides

OSHA classifies alternating tread stairs (alternating tread devices) as non-standard stairs and states they are acceptable to use in applications where it is not feasible to use standard stairs. §1910.25(b)(8)

Maximum safety, minimum space

Alternating tread stairs are safer and more comfortable than other space-saving devices.

OSHA requirements for standard stairs

General stair requirements 1910.25(b)

Compliant fall protection (guardrail system)
Uniform riser heights and tread depths ❷❸

Requirements for standard stairs 1910.25(c)

Slope between 30° and 50° from the horizontal
Maximum riser height of 9.5”
Minimum tread depth of 9.5”
Minimum width of 22”

Duty to provide fall protection 1910.28(b)
Guardrail system requirements 1910.29(b)
Handrail requirements 1910.29(f)

Top edge height of top rails is 42”
Maximum baluster spacing of 19”
Handrail height of 36”
Minimum finger clearance of 2.25”

What type of stair is the best fit for your application?

Compare the space requirements for standard stairs and alternating tread stairs to determine which type of stair to choose.

View guidelines

OSHA requirements for standard stairs

General stair requirements 1910.25(b)

Compliant fall protection (guardrail system)
Uniform riser heights and tread depths ❷❸

Requirements for standard stairs 1910.25(c)

Slope between 30° and 50° from the horizontal
Maximum riser height of 9.5”
Minimum tread depth of 9.5”
Minimum width of 22”

Duty to provide fall protection 1910.28(b)
Guardrail system requirements 1910.29(b)
Handrail requirements 1910.29(f)

Top edge height of top rails is 42”
Maximum baluster spacing of 19”
Handrail height of 36”
Minimum finger clearance of 2.25”

What type of stair is the best fit for your application?

Compare the space requirements for standard stairs and alternating tread stairs to determine which type of stair to choose.

View guidelines

Additional OSHA requirements for all stairs

Additional stair requirements §1910.25(b)

Minimum vertical clearance above each tread of 6’8”
Landings/platforms at least the width of the stair
Landings/platforms at least 30” deep
Door/gate swing does not reduce usable depth less than 22”
Capable of supporting five normal anticipated load (not less than 1000#)

Additional guardrail requirements §1910.29(b)

Capable of withstanding force of at least 200#
Must be smooth-surfaced
Top rail diameter of at least .25”

Additional handrail requirements §1910.29(f)

Capable of withstanding force of at least 200#
Must be smooth-surfaced
Have shape and dimension to allow firm grasp
Must be free of projection hazards

Blog posts about OSHA stair codes


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