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Poles shall be secured at the top by rigid triangular bracing or equivalent 1926.452(j)(2): Poles shall be secured at the top by rigid triangular bracing or equivalent.
 

Note: Aurora, Illinois, OSHA office recommendation is that play is no more than 3/4 inch in either direction. Also, wood gusset is to be 3/4 inch thick plywood, 18 inches wide, 5' to 8' in length, secured with 4 sixteen penny nails, and nailed through roof deck into truss/rafter.

Pumpjack - 9
Photo: John Newquist
 
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