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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Sheet rock screws: fine vs coarse thread?
"Ed Huntress" wrote:
The Gougeon Brothers of sailboat fame did tests of coarse- versus fine-thread screws in wood back in the '60s. Coarse-thread won. Sheet metal screws beat wood screws in wood every time. That was before sheet rock screws. Normally I'd go with what you said but, I constructed two envelope walls (no studs having conduction from inside to outside for my machine room. The studs are tamarack, fine pitch was easier to use but I did finally resort to drywall nails, some that bent over. For a soft wood, tamarack sure doesn't know it. Generally fine pitch is for steel studs iirc. Wes |
#2
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Sheet rock screws: fine vs coarse thread?
"Wes" wrote in message ... "Ed Huntress" wrote: The Gougeon Brothers of sailboat fame did tests of coarse- versus fine-thread screws in wood back in the '60s. Coarse-thread won. Sheet metal screws beat wood screws in wood every time. That was before sheet rock screws. Normally I'd go with what you said but, I constructed two envelope walls (no studs having conduction from inside to outside for my machine room. The studs are tamarack, fine pitch was easier to use but I did finally resort to drywall nails, some that bent over. For a soft wood, tamarack sure doesn't know it. Generally fine pitch is for steel studs iirc. I'm sure there are exceptions. What the Gougeons learned first was that conventional wood screws didn't hold as well as sheet-metal screws in any wood they tested, probably due to their deeper and fuller threads. -- Ed Huntress |
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