[RE-wrenches] Steel roof attachments

[Chris Mason]

I have a large steel roof project to install that is giving me some
problems. There are many locations so no one is the same.
Most of the roofs are steel sheet over steel purloins with no insulation.
The steel sheeting is lying right on top of the purloins.
Can I use a self drilling self tapping screw to attach? Who makes one large
enough?
In some cases I get get to the underneath but working off 30' ladders to
make each attachment is too labour intensive as the warehouses are full of
goods..

In the case of the roofs that have foam filled panels or corrugated I will
have to use EJOT fasteners but these seem overkill for steel on steel
fastening, they are very expensive.

Thanks for the help,
-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20121021/d1059ddc/attachment-0002.html>