[RE-wrenches] Low slope membrane roof attachment

[Chris Worcester]

Hi Carl,

In a similar scenario with TJI rafters and OSB sheathing we had the
carpenters install 4x8 blocking between the rafters up against the bottom of
the OSB for us to lag into. It is nice in new construction to be able to do
this as they are building the roof system before the sheathing goes on.
There were packing/blocks placed in the TJI webbing to pack out the TJI's on
both sides of their plywood vertical core, so the 4x8 blocking had solid
purchase and nailing through this part of the TJI.

We were then able to lag our standoffs into the blocking, staying away from
the TJI flanges as they aren't designed to be drilled or lagged into. 

 

Chris Worcester

Solar Wind Works

NABCEP Certified PV Installer

Office 530-582-4503

Cell 530-448-9692

Fax 530-582-4603

www.solarwindworks.com

chris at solarwindworks.com

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Carl Adams
Sent: Monday, November 25, 2013 12:59 PM
To: RE-wrenches
Subject: [RE-wrenches] Low slope membrane roof attachment

 

Hello Wrenches,

 

I am looking at a new construction project where the roof will be 5 degree
pitch, 5/8" OSB on top of TJI (truss joists).  I am not sure the TJI will
support a lag attachment, as we would use with a conventional wood frame
trusses.  

 

Have any of you run into this, and if so what attachment method did you use.


 

I have attached tow pictures.  One of a similar low slope roof which appears
to use Pro Solar rails and perhaps the Pro Solar Fast Jack E-series.   I'm
not sure a single lag would work with the TJI.  The other attached picture
is of the TJI.  Looking at this amkes me think another connection method
might be a better choice.

 

With Regards

Carl Adams  NABCEP 031508-1

SunRock Solar

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20131125/4ee41b56/attachment-0004.html>