§ 21.65. Wood for ladder use.
(a) The classification of wood into four groups as set out in § § 21.61—21.64 (relating to group one woods; group two woods; group three woods; and group four woods) is made on the basis of mechanical properties considered from the standpoint of use for ladder construction.
(b) The species of wood set out in § § 21.61, 21.62 and 21.64 (relating to group one woods; group two woods; and group four woods) may be substituted for those in § 21.63 (relating to group three woods) for side rails in the indicated sizes.
Cross References This section cited in 34 Pa. Code § 21.21 (relating to wood side rails).
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