# Directives
1 1982 - 04/26/1982 - STD 01-01-011 [STD 1-1.11] - The Alternating Tread Type Stair
# Federal Registers
1 1998 - 09/30/1998 - Submission for OMB Review; Comment Request - 63:52298-52300
2 1998 - 06/26/1998 - Walking-Working Surfaces; Information Collection Requirements. - 63:34933-34934
3 1990 - 07/18/1990 - Extension of Written Comment Period and Scheduled Hearing on Proposed Rule on Walking and Working Surfaces and Personal Protective Equipment (Fall Protection Systems) - 55:29224-29
4 1982 - 05/28/1982 - Ladders, Fixed - 47:23479
5 1982 - 05/28/1982 - Ladders, Fixed - 47:23479
6 1972 - 03/31/1972 - Ladders, Fixed - 37:6575
# Standard Interpretations
1 2015 - 02/13/2015 - Requirements for Rails and Steps for Access to Semi-Trailers (Walking and working surfaces, motor vehicles, stairs)
2 2012 - 06/06/2012 - Step Sizes and Angles of Fixed Industrial Stairs
3 2010 - 06/15/2010 - Clarification of OSHA requirements pertaining to winding stairway systems.
4 2006 - 02/10/2006 - Circumstances under which installation of fixed industrial stairs with a slope between 50 degrees and 70 degrees from the horizontal would be considered a de minimis violation.
5 2003 - 12/10/2003 - Fixed industrial stair requirements for access to secondary containment structures surrounding bulk chemical storage tanks.
6 1996 - 07/12/1996 - Use of toeboards to protect a floor hole and variations in riser heights for stairs.
7 1991 - 10/03/1991 - Width of Manhole Covers
8 1978 - 11/17/1978 - Clarification of 29 CFR 1910.24(b).