N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 23-1.11 - Lumber and nail fastenings
(a)
The lumber used in the construction of equipment or temporary structures
required by this Part (rule) shall be sound and shall not contain any defects
such as ring shakes, large or loose knots or other defects which may impair the
strength of such lumber for the purpose for which it is to be used.
(b) The lumber dimensions specified in this
Part (rule) are nominal or trade size except as otherwise specifically stated
with the words "full size" and except in the case of ladders.
(c) All nails shall be driven full length and
shall be of the proper size, type, length and number to provide the required
strength at all joints. Only double-headed or screw-type nails shall be used in
the construction of scaffolds.
Notes
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