[RE-wrenches] TJI rafters

[Chris Worcester]

We've done roof mount pv on tji's. Our engineer required 4x blocking installed between the tji rafters that we lag bolted into. You're not allowed to cut or drill/bolt into the top and bottom cords of the tji's. We also packed out both sides of the tji plywood webbing prior to installing the blocking. Our snow loads oftentimes are too high and won't allow me to screw into the plywood roof deck only. 


Chris Worcester chris at solarwindworks.com 530-448-9692on my Samsung Galaxy S7.
-------- Original message --------From: Aaron Mandelkorn <reosolar at gmail.com> Date: 3/4/18  6:44 AM  (GMT-08:00) To: RE-wrenches <re-wrenches at lists.re-wrenches.org> Subject: Re: [RE-wrenches] TJI rafters 
I have also used the sunmoto mounts with the multiple holes. They are called the AL shoe I believe.  It makes a great alternative to the DPW ez foot which are very expensive and take forever to receive.  We but butal mastic tape on the back.  Just like the ez foot.  

Aaron Mandelkorn
President / Founder
Renewable Energy Outfitters
www.reosolar.com
Off Grid Depot
www.offgridnow.com
970-596-3744

    
On Mar 3, 2018 5:54 PM, "August Goers" <august at luminalt.com> wrote:
Hi All - We tie into TJIs commonly, if you Google "TJI solar" you'll find manufacturer docs on how to properly lag in.
August
On Mar 2, 2018 1:24 PM, "Jerry Caldwell" <solarcowboy at yahoo.com> wrote:
Dear Wrenches,
I have a customer with a low slope roof supported by TJI beams. Does anyone have experience permitting and installing on TJIs? I'm curious if jurisdictions are requiring Structural Engineer stamps. 
Since the top chord of the beams is only 1 3/8" thick should we be using shorter lag bolts for these installations? It also seems that it would be undesirable to penetrate into the web of the beam.
Any advice would be appreciated here.
Thank you,
Jerry Caldwell

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