we pushed that proposal out on the table a couple of cycles ago and
pulled back a bloody stump. The TC likes the idea of being REALLY
conservative.
Roland
On Oct 12, 2010, at 12:37 PM, Thom wrote:
http://www.sammysuperscrew.com/pdf/sammys%20steel%20vertical.pdf
UL/FM Sammy screws for steel from 20ga. To 1/2" thick have a rating
of 1475#
so even if you're using 4" sch. 40 at max. spacing the load plus
your 250#
falling fitter, you won't exceed the pull-out.(P.S. that falling
fitter
hanging onto the sprinkler pipe is an OSHA violation, since he
should be
tied off to the structure. For years now many have advocated getting
rid of
that extra 250# load.)
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