34 Pa. Code § 45.58 - Shingle mills
(a) The front
or cutting face of knife-type shingle jointers shall be completely enclosed,
with the exception of a narrow slot through which the shingles may be fed
against the knives.
(b) The saw
used in shingle mills shall be guarded with a hardwood or heavy metal strip. If
practicable, the saw shall be completely enclosed, except the operating
edge.
(c) Shingle bolts for
vertical shingle mills shall be piled not more than two high.
(d) Shingle clip saws shall be entirely
enclosed, except for the operating edge.
Notes
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