Ladder Jack Scaffolds
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.
This worker is using a standard two-rung ladder jack scaffold while installing siding. Is the vertical lifeline safely secured to a fixed point of anchorage independent of the scaffold?
When inspecting these platforms, check the following:
- Check that all ladders used to support ladder jack scaffolds comply with 1926 Subpart X - Stairways and Ladders.
- Make sure job-made ladders are NOT used to support ladder jack scaffolds.
- Verify ladder jacks are designed and constructed to bear on:
- the side rails and ladder rungs
- the ladder rungs alone
- If ladder jacks bear on the ladder rungs alone, check that the bearing area includes a length of at least 10 inches on each rung.
- Make sure ladders used to support ladder jack scaffolds are:
- placed to prevent slipping
- fastened to prevent slipping
- equipped with devices to prevent slipping
- Verify platforms are not being placed higher than 20 feet from the supported base. Make sure scaffold platforms are not being bridged together.
- Verify the intent is not to exceed the ladder jack scaffold load limit of 25 pounds per square foot.
- Verify not more than two employees are occupying any platform at one time.
- Check that the maximum span between supports is no more than 8 feet.
Knowledge Check Choose the best answer for the question.
4-5. What is the ladder jack scaffold load limit?
You forgot to answer the question!