ANSI A14.3 : 2008(R2018)

Section 1 - General
1.1 Scope
1.2 Purpose
1.3 Application
1.4 Pitch
1.5 Exceptions
1.6 Existing Installations
1.7 Interpretation
1.8 Mandatory and Advisory rules
1.9 Equivalent
1.10 Recognized Design Practice
Section 2 - Related Standards
2.1 Related American National Standards
2.2 Other Related Standards
Section 3 - Definitions
Section 4 - General Design Criteria
4.1 Maximum Ladder Lengths and Protection Requirements
4.2 Design Loads
4.3 Design Stresses and Fabrication
4.4 Design Supervision
Section 5 - Design Details for Fixed Ladders
5.1 Steps and Rungs
5.2 Side Rails
5.3 Termination at the Top of the Ladder
5.4 Clearances
5.5 Grounding
5.6 Moisture Resistance
Section 6 - Design Details for Cages, Wells, and Platforms
6.1 Cages
6.2 Wells
6.3 Platforms
Section 7 - Ladder Safety Systems
7.1 General Design
7.2 Safety Factors
7.3 Ladder Safety Systems Consisting of a Carrier,
      Safety Sleeve, and Body Belt
7.4 Ladder Safety Systems of Other Designs
Section 8 - Protective Finishes
8.1 Metal Ladders
8.2 Wood Ladders
8.3 Combined Materials
Section 9 - Maintenance and Use of Ladders
9.1 General
9.2 Use
9.3 Maintenance
Section 10 - Revision of American National Standards
      Refered to in this Document
Figures
Fig. 1 Pitch of Fixed Ladders
Fig. 2 Length of Climb 24 ft. or less - Cage, Well or
        Ladder Safety System Not Required
Fig. 3 Length of Climb 24 ft. or less with Elevated
        Access - Cage or Ladder Safety System Required
Fig. 4 Single Length of Climb Greater than 24 ft. but
        not exceeding 50 ft. - Cage, Well, or Ladder
        Safety System Required
Fig. 5 Total Lengths of Climb Greater than 50 ft. -
        Platforms and Cages, Wells, or Ladder Safety
        Systems Required
Fig. 6 Support and Ladder Dimensions and Side Clearances
Fig. 7 Individual Rung Ladders - Suggested Design of Rungs
Fig. 8 Termination at Floor or Platform
Fig. 9 Terminations at Roof
Fig. 10 Grab Bars
Fig. 11 General Arrangements for Ladders in Wells
Fig. 12 Deflector Plate for Hatch Opening With
        Reduced Clearance
Fig. 13 Counterbalanced Hatch Cover at Roof
Fig. 14 Minimum Ladder Clearances
Fig. 15 Through Ladder Clearances - Ladder Placed Far
        From Wall
Fig. 16 Example of the General Construction of Cages
Fig. 17 Example of a Cage Plan
Fig. 18 Display of Power Grip

This standard prescribes minimum requirements for the design, construction, and use of fixed ladders, and sets forth requirements for cages, wells, and ladder safety systems used with fixed ladders, in order to minimize personal injuries.