Current through Register Vol. 54, No. 50, December 14, 2024
Section 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. This section cited in 34 Pa. Code § 21.21 (relating to wood side rails).