§ 21.36. Extension ladders.
(a) Side rails of extension ladders when fully extended shall conform with the dimensions of § 21.32 (relating to side rails) for such extended length. On a two piece extension ladders it is recommended that allowance be made for a 3 foot lap up to approximately 38 feet, a 4 foot lap for 40 and 44 feet extended lengths, a 5 foot lap for 46 feet and up, and for three section ladders 4 feet at each lap for 46 feet and up of extended length. Rungs shall be according to the requirements of § 21.33 (relating to steps).
(b) The minimum distance between side rails of bottom section of extension ladders shall be as follows:
Full working length ladder
(feet)Minimum distance
(between side rails)
(inches)Up to and including 23 14 1/2 Over 23, up to and including 36 16 Over 36, up to and including 55 18 (c) Each ladder shall be equipped with two automatic locks of an approved type.
(d) Locks and guide irons shall be of such construction as to make the extension ladder equal in strength to a ladder constructed of continuous side rails.
(e) Locking devices other than as specified in this section may be used after they are approved for such service.
(f) Ladders over 30 feet in length shall be equipped with metal shackle, pulley, and rope for operation. It is recommended that ladders less than 30 feet in length be also so equipped.
Cross References This section cited in 34 Pa. Code § 21.39 (relating to fire ladders).
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