Report - DURA-BLOK Rooftop Supports - Talley fileDURA-BLOK Supports DURA-BLOK™ Rooftop Supports 153 Strut Systems Bolt Size 1/4”-20 5/16”-18 3/8”-16 1/2”-13 Foot/Lbs. 6 11 19 50 Nm

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