34 Pa. Code § 21.40 - Stepladders
(a) Stepladders
over 20 feet in length may not be used.
(b) Stepladders shall have side rails of the
following solid cross section or a section which is equivalent in strength; the
required thicknesses provide for the cutting of a gain not over 1/8 inch in
depth and shall be increased when gains of greater depth are used:
| Length of Side Rails (feet) | Thickness (inches) | Depth (inches) |
| Up to and including 10 | 25/32 | 2 3/4 |
| Over 10, up to and including 12 | 25/32 | 3 |
| Over 12, up to and including 16 | 25/32 | 3 1/4 |
| Over 16, up to and including 20 | 1 | 3 1/4 |
(c)
Stepladders shall be so constructed that when they are placed in the open
position the front section shall have a minimum slope of 3 1/2 inches and the
back section a minimum slope of 2 inches for each 12 inch length of side
rail.
(d) Stepladders shall be so
constructed that when they are placed in the open position all treads shall be
level. Treads shall be in accordance with the requirements of §
21.33 (relating to
steps).
(e) Except as specified in
§
21.31(b)
(relating to general) the minimum width between side rails at the top step,
inside to inside, may not be less than 12 inches with a spread of at least one
inch for each foot of length of stepladder.
(f) A locking device or spreader to hold the
front and back sections in open position shall be a component of each
stepladder. This device shall have all sharp points covered or removed to
protect the user.
(g) The back
section of stepladders, if provided with steps, shall be built with side rails
having a thickness not less than that specified for the front section in
subsection (b) and the depth of side rails shall be such that the section will
not develop a working stress for woods listed in §
21.63 (relating to group three
woods) greater than 1,600 pounds per square inch when tested by the formula in
§
21.32 (relating to side rails). If
not provided with steps, the back section shall be built with side rails and
bracing necessary to provide for all probable stresses in the
section.
Notes
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