Easy to understand design criteria for Fixed Roof Ladders. Precision Ladders, LLC - building superior Aluminum Ladders since 1942. Made in the USA. Easy Installation and NO Maintenance.

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2. Fixed Vertical Ladders

3. Applicable Codes for Fixed Ladders
0 OSHA-Occupational
Safety & Health Admin.
0 ANSI-American National
Standards Institute
0 OSHA and ANSI code are similar. The
more stringent code element in each is
used as a guideline in this presentation.
0 National codes
0 OSHA 1910.27
0 www.OSHA.gov
0 ANSI A14.3
0 www.ANSI.org
0 Websites offer easy code reference
Note: Some states may have special code requirements

4. Current OSHA and ANSI Code Covers
Fixed Vertical Ladders Only

5. Ladder Security Doors and
Security Gates

6. Ladder Extensions at Walk Thru Exit
0 24” clear opening
0 Standard true for caged ladders
0 Exit Straight through = 42” side
rail extension is required

7. Step Across Distance
0 Distance from the top tread to
a weight bearing surface:
0 OSHA = 2-1/2” to 12”
0 ANSI = 7” to 12”
0 Platforms are required to gap
larger step across distances

8. Ladder Extensions at Side Exit
0 Side Exit = Overshoot
0 Overshoot = at least 48” above
the top tread
0 Rungs are NOT omitted
0 Standard true for caged ladders

9. Areas of Angle
0 Ladders may not have angles
greater than 90°
0 Preferred pitch – 76° to 90°
0 Substandard pitch (inclined, ships
ladder) – 60° to 75°

10. 0 Live Load per Rung Requirements
0250 lbs. (ANSI)
0200 lbs. (OSHA)
0 Note: Industry standard is +/- 1000 pounds
Rungs, Cleats or Treads

11. Rungs, Cleats or Treads
0 Requirement = burr free power grip surface
0 Any shape is accepted
0 ¾” minimum cross section standard
0 1” minimum in high corrosion areas
0 Anti-slip texture preferred

12. Rungs, Cleats or Treads
0 First rung level with exit point at top
of ladder
0 Rungs descend in 12” increments
0 Spacing must be equal
0 Bottom rung must be within 14” of
ground

13. Rungs, Cleats or Treads
0 12” maximum vertical tread spacing
0 Uniform spacing throughout climb
0 ANSI states bottom rung 14”
maximum above ground
12” MAX
14” MAX
14” MAX
12” MAX

14. Clearances (Clear Width of Tread)
16”
MIN16” min
0 16” minimum between side rails

15. Clear Space Behind Ladder
0 7” minimum clear space behind ladder
0 Exceptions for unavoidable obstructions are rarely granted.
7”
MIN
7” min

16. Climber Clearance
15”
MIN15“ min 15” min
0 15” Clear width left and right
0 Except when cage required

17. Climber Clearance
0 Minimum 30” clearance
0 Minimum 36” at a 76° pitch
0 All others proportional distance determined
by slope
2’ 6”min

18. Safety Cages (OSHA)
0 Cages provided on ladders more than
20’
0 Recommended on shorter ladders in
dangerous locations
0 Cages extend past exit point
0 Cages start between 7’ and 8’ above
ground
0 Cage sizes and shapes set by code

19. Safety Cages (ANSI)
0 Cages provided on ladders more than 24’
0 Recommended on shorter ladders in
dangerous locations
0 Cages extend past exit point
0 Cages start between 7’ and 8’ above
ground
0 Cage sizes and shapes are set by code

20. Landing Platforms
0 Landings provided for each 30’ of height except where no
cage, well, or ladder safety device is provided
0 Rest platforms offset at each level
0 Rest platforms have handrails and toe boards on all
exposed sides
0 Landing minimum 48” length and 30” width
0 Ladder accessing landing have rung level with platform

21. 4188 East Andrew Johnson Highway
Morristown, TN 37814
800-225-7814
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