Supported Scaffolds Ladder Jack
A ladder jack scaffold is a simple device consisting of a platform resting on brackets attached to a ladder. Ladder jacks are primarily used in light applications because of their portability and cost effectiveness.
NOTE: The requirements on this page are specific to ladder jack scaffolds only. For requirements that apply to all types of supported scaffolds, please refer to the Frame or Fabricated module of this eTool.
- All ladders used to support ladder jack scaffolds must comply with 29 CFR 1926 Subpart X - Stairways and Ladders. [29 CFR 1926.452(k)(2)]
- Exception: Job-made ladders must not be used to support ladder jack scaffolds.
- Ladder jacks must be designed and constructed to bear on [29 CFR 1926.452(k)(3)]:
- The side rails and ladder rungs.
- Or the ladder rungs alone.
- If ladder jacks bear on the ladder rungs alone, the bearing area must include a length of at least 10 inches on each rung.
- Ladders used to support ladder jack scaffolds must be [29 CFR 1926.452(k)(4)]:
- Placed to prevent slipping.
- Fastened to prevent slipping.
- Or equipped with devices to prevent slipping.
- Ladder jack scaffolds have a maximum intended load of 25 pounds per square foot. [29 CFR 1926 Subpart L Appendix A (2)(k)]
- Not more than two employees may occupy any platform at one time. [29 CFR 1926 Subpart L Appendix A (2)(k)]
- The maximum span between supports is 8 feet. [29 CFR 1926 Subpart L Appendix A (2)(k)]