§ 3a.35. Ladders and runways.

 (a)  Walkways, runways and platforms are required between and on top of boilers, which are more than 8-feet high from the operating floor to afford accessibility for the operation and servicing.

 (b)  Walkways, runways and platforms must meet the following requirements:

   (1)  Be constructed of metal.

   (2)  Be constructed of safety treads, standard grating, or similar material with a minimum clear width of 30 inches.

   (3)  Be constructed by bolts, welds or rivets.

   (4)  Be equipped with handrails that are 42-inches high with an intermediate rail and 6-inch toeboard.

 (c)  A stairway that is a means of access to the walkways, runways or platforms must not exceed an angle of 45°.

 (d)  A ladder that serves as a means of access to walkways, runways or platforms must be constructed:

   (1)  Of metal.

   (2)  So the rungs extend through the side members and are permanently secured to the side rails.

   (3)  So the front of the rungs have a distance of at least 30 inches from the nearest permanent object on the climbing side of the ladder.

   (4)  So the back of the rungs have a distance of at least 6 1/2 inches from the nearest permanent object.

   (5)  So there is a clear width of at least 15 inches from the centerline of the ladder on either side across the front of the ladder.

 (e)  A welder qualified under Standard Qualification Procedures of the American Welding Society is required for welding a walkway, runway, platform or ladder.

 (f)  A walkway, runway or platform exceeding 6 feet in length must have at least two means of exit access.

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