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When using straight ladders, the base of the ladder should be one feet away from the wall or other vertical surface for every four feet of height to the point of support.
What is 4-1 Ladder?
For every four feet the base extends from the wall, the base should also. By counting the rungs, which are spaced about a foot apart, one can estimate this. To avoid overloading a rail, make sure the latches (or locks) are in place and functional.
- Portable stepladders must be longer than 20 feet.
- All portable ladders must have a minimum of 16 inches between side rails to be considered clear.
- Portable ladders must have non-slip feet.
- Rungs, cleats, and steps on portable ladders must be positioned no closer than 10 inches apart than 14 inches apart along the side rails of the ladder.
- On step stools, the distance between the center lines of the rungs, cleats, and steps cannot be less than 8 inches or greater than 12 inches.
- Each stepladder must include a metal spreader bar or locking mechanism to keep the front and back parts open.
- Surfaced ladder parts must be used to avoid clothes snagging and harm from cuts or punctures.
- Wooden ladders must not be painted in order to conceal wood flaws.
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