Section 408.10341. Special rules for utility manhole fixed ladders.

(1) A utility manhole fixed ladder shall have:

(a)    Rungs of not less than 3/4-inch diameter steel rod or material capable of supporting 300 pounds with not less than 10-inch clear length. Rungs existing before the effective date of this part may be 5/8 inch diameter steel rod or material of equal strength capable of supporting 200 pounds.

(b)   Rungs not less than 4 inches from the center of the rungs to the wall on the side opposite the climbing side. The rungs shall be embedded not less than 3 inches in the wall and aligned one above another.

(c)    Rungs not less than 27 inches from the center of the rungs to the wall or projections on the climbing side.

(d)   After November 15, 1971, rung configuration shall be so designed that an employee's foot cannot slide off the end. (See figure 1.)

(e)   Spacing between rungs of not more than 16 inches on center and uniformly spaced throughout the entire length.

(2) A utility manhole with a conical shape shall not be provided with a fixed ladder. Access shall be by a portable ladder only.

History: 1979 AC.