Subject: Re: self drilling screw spacing for light gage
Date: Wed, 9 Jun 1999 19:09:52 EDT
Larry Williams (director of LGSEA) may be able to help you on this one. He
can be reached at lgsea(--nospam--at)aol.com. At worst case, he should be able to lead you
to the sourse of an answer.
In a message dated 6/9/99 9:09:04 AM Pacific Daylight Time,
<< I have run into an interesting problem. That being the difficulty in
finding information on minimum spacing and edge distances of screws for
connecting light gage members (web to chord connections in light gage
trusses, specifically). The particular screw that has been used is a 12-14
TEK3 as manufactured by Triangle Fastener Corp. under the trade name
"Blazer". A call to TFC was of no help whatsoever. I then tried the Hilti
catalog under the assumption that a similar screw by different manufacturers
would, in essence, be indentical. Unfortunately, Hilti does not provide
this information in their catalog either (at least for their "Kwik-Pro"
I had some info at one time calling for 3/4" minimum spacing and that is
what was specified. I have since misplaced it. The problem is that my
trussess were assembled with screw spacing of 1/2" or even slightly less. I
would like a firm number on minimum spacing as well as a formula or table
that will allow me to decrease the allowable load per screw based on some
spacing less than the minimum. If anyone has this information, or can point
me in the proper direction on how to obtain it, please let me know.
Sherman D. (Dan) Vines
Willett Engineering Co., Inc.