Carl,
In the past we have had 8"x8"x 1/4" aluminum plates made up by the
local machine shop for about $9 each and used them to distribute the
compression for L feet on SIP roofs. It works very well and allows you
to adequately tighten the lags and not compress the foam. For more
specifics give me a call.
Daryl
> Hi Carl,
>
> Have you looked at the DPW easy feet.
>
> Very large foot that shouldn't compress the foam.
> You may want to use more feet to distribute the load as well.
> They may be able to give you some help on the calcs.
>
> jay
>
> peltz power
> On Sep 8, 2009, at 1:04 PM, Carl Adams wrote:
>
>> Hello Wrenches,
>>
>> I have a job on a 3.5/12 pitched rubber roof. We have 1.5 foam under
>> the EPDM, then the steel decking, then the purlins. Purlin spacing
>> supports adequate attachment points for a conventional rail mounted
>> system. I have 2 questions
>> 1) A typical L-foot attachment to the roof would likely compress the
>> underlying foam and result in divets at each foot. What do you
>> recommend to disperse the load at the point of attachment
>> 2) What type of screw do you recommend for attaching the L-Feet to
>> the purlins
>>
>> With Regards
>> Carl Adams
>> NABCEP Certified Solar PV Installer
>> NABCEP Certified Solar Thermal Installer
>> SunRock Solar
>> Cincinnati, Ohio
>> 513.766.6025
>> www.sunrocksolar.com
>> _______________________________________________
>>
>
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