24.B.05 Spacing of rungs, cleats, and steps on ladders.
Ladder Safety Tips - Elvis Benoit.
- On portable ladders, spacing of rungs must be 12 in (30.4 cm) on center and uniform, except for job-made ladders where the spacing must be 10 in (25.4 cm) to 14 in (35.5 cm).
- On step stools, spacing must be not less than 8 in (20.3 cm) or more than 12 in (30.4 cm) apart, as measured from their centerlines.
24.B.06 Ladders must be surfaced so as to prevent injury to an worker from punctures or lacerations and to prevent snagging of clothing.
24.B.07 Wooden ladders must not be coated with any opaque covering, except for identification or warning labels that may be placed on only one face of a side rail.
24.B.08 Portable ladders must have slip-resistant feet.
24.B.09 The rungs and steps of portable metal ladders must be corrugated, knurled, dimpled, coated with skid-resistant materials, or otherwise treated to minimize slipping.
24.B.10 A metal spreader bar or locking device must be provided on each stepladder to hold the front and back sections in an open position.
24.B.11 Set-up of ladders.
- Ladders must not be placed in passageways, doorways, drives, or any locations where they may be displaced by any other work unless protected by barricades or guards.
- Portable ladders must be used at such a pitch that the horizontal distance from the top support to the foot of the ladder will not be greater than 1/4 the vertical distance between these points.
- Wooden job-made ladders, with spliced rails, must be used at an angle such that the horizontal distance is 1/8 the length of the ladder.
- Ladders must be secured by top, bottom, and intermediate fastenings, as necessary, to hold them rigidly in place and to support the loads that will be imposed upon them.
- The steps or rungs of all ladders must be set to provide at least 7 in (17.7 cm) toe space from the inside edge of the rung to the nearest interference.
- The top of a non-self supporting ladder must be placed with the two rails supported equally, unless the ladder is equipped with a single support attachment.
- Step-across distance. The step-across distance from the nearest edge of ladder to the nearest edge of equipment or structure must be not more than 12 in (30.5 cm) or less than 2-1/2 in (6.4 cm).
Knowledge Check Choose the best answer for the question.
24-4. Why must the rungs and steps of portable metal ladders be corrugated, knurled, dimpled, or coated with skid-resistant materials?
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