Driving in a few wood screws tonight made me remember a few things memorized. Are they correct or good standards if not? No idea of the standards other than possibly "Backstage Handbook" on the tie line.
-80% of the holding power of a wood screw is in the tip of the screw. (Thru drilling or extra depth pilot holes don’t help in holding power, you want to at least finish driving the screw by digging it into the wood.)
-Sheer strength of a drywall screw is 120#. (Suspect this is in reference to a #6 drywall screw.) So any plate that is in sheer - with load on the screw instead of lumber to lumber should have at least 100% more screws for load rating than expected load say per step.
-Breaking strength of a 5/16" Lag bolt, or anything Grade 2 is about 200# in general.
-90# SWL for 1/16" GAC wire rope.
-280# SWL for 1/8" GAC wire rope.
-40# SWL for tie line - static line.
-14 TPI blade for anything 16ga or thicker up to 3/8" in mild steel, but marginally up to only 3/16" in aluminum - all with brushed on cutting fluid for say up to 10" length of cut. 10TPI after for corded type hand tools for thicker excluding band saw. 18TPI for anything down to say 20ga including EMT conduit, and 20-24TPI for less thickness in cutting. (Been around longer than I in the industry someone’s use a 14 TPI Sawzall on Din Rail.... Yea, he went back to his hack saw. Really old timer...)
-80% of the holding power of a wood screw is in the tip of the screw. (Thru drilling or extra depth pilot holes don’t help in holding power, you want to at least finish driving the screw by digging it into the wood.)
-Sheer strength of a drywall screw is 120#. (Suspect this is in reference to a #6 drywall screw.) So any plate that is in sheer - with load on the screw instead of lumber to lumber should have at least 100% more screws for load rating than expected load say per step.
-Breaking strength of a 5/16" Lag bolt, or anything Grade 2 is about 200# in general.
-90# SWL for 1/16" GAC wire rope.
-280# SWL for 1/8" GAC wire rope.
-40# SWL for tie line - static line.
-14 TPI blade for anything 16ga or thicker up to 3/8" in mild steel, but marginally up to only 3/16" in aluminum - all with brushed on cutting fluid for say up to 10" length of cut. 10TPI after for corded type hand tools for thicker excluding band saw. 18TPI for anything down to say 20ga including EMT conduit, and 20-24TPI for less thickness in cutting. (Been around longer than I in the industry someone’s use a 14 TPI Sawzall on Din Rail.... Yea, he went back to his hack saw. Really old timer...)