290

Purlin Clamp

Figure: 290

Function

Designed for use with large-lip rolled steel purlins to eliminate the need to modify steel purlin for standard C-clamp.

Material: Malleable iron with hardened steel cup point set screw and locknut

Finish: Plain or electro-galvanized

Approvals: Underwriters’ Laboratories Listed in the U.S. (UL) and Factory Mutual Approved. Complies with Federal Specifications A-A-1192A (Type 23) and Manufacturers’ Standardization Society ANSI/MSS SP-58 (Type 23) which supersedes ANSI/MSS SP-69.

Ordering: Specify figure number and finish.

NOTE: When a torque wrench is unavailable, the setscrew should be tightened so it contacts the I-beam and then an additional 1/4  to 1/2 turn.

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