[RE-wrenches] anchoring racks to concrete roof

Geoff Greenfield geoff at third-sun.com
Thu Feb 12 10:50:01 PST 2009


This doesn't apply to your specific project, but a heads up in general - we "thought" we had a concrete roof and were looking to use masonary fasteners, but it turned out to be really weak "grout" that was an overpour over steel deck to serve as firestop and drainage slope.   sometimes concrete isnt concrete. 



For a brighter energy future, 

Geoff Greenfield 
Founder and President 
Third Sun Solar & Wind Power Ltd. 
340 West State Street, Unit 25 
Athens, OH 45701 

740.597.3111     Fax 740.597.1548 
www.Third-Sun.com 

Clean Energy - Expertly Installed 






----- "Tump" <tump at hughes.net> wrote: 
> Hey Jay we have used epoxy in the past, drill hole, clean, fill w/ E, put SS 
> threaded rod in hole & there ya go! ( all the feet at the hi school)  you 
> will probably need to talk to a PE if your getting a permit, but it works 
> great. Contact Chris of me off list FMI TUMP 
> -----Original Message----- 
> From: re-wrenches-bounces at lists.re-wrenches.org 
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz 
> Sent: Tuesday, February 10, 2009 8:35 PM 
> To: RE-wrenches 
> Subject: [RE-wrenches] anchoring racks to concrete roof 
> I've got a client with a foam core concrete covered roof. 
> the concrete is 2.5" thick + over metal mesh over 6" ridged foam and   
> then the same on the inside. 
> What anchor choices are best to mount the feet to? 
> Thanks in advance 
> jay 
> peltz power 
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