Jerry,

            The only thing I feel compelled to add with your decision would be dang sure to pre-drill AND I sure wouldn't be putting a 3/8" lag into a TJI flange, maybe 1/4" Simpson lags? or tech screws?


Bill

Feather River Solar Electric


On 3/6/2018 3:57 PM, Jerry Caldwell wrote:
Bill,

Mineral bitumen roll roofing. 2:12 slope.

Everyone who gave input below, thanks for the suggestions.

I've decided to go with the Quick Mount Q-Base product. It allows you to get 2 lag bolts into the top chord on either side of the OSB web.

Cheers,
Jerry Caldwell

On Sunday, March 4, 2018, 1:19:51 PM PST, Chris Worcester <ch...@solarwindworks.com> wrote:


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
 ch...@solarwindworks.com
 530-448-9692
on my Samsung Galaxy S7.

-------- Original message --------
From: Aaron Mandelkorn <reoso...@gmail.com>
Date: 3/4/18 6:44 AM (GMT-08:00)
To: RE-wrenches <re-wrenches@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 <http://www.reosolar.com>
Off Grid Depot
www.offgridnow.com <http://www.offgridnow.com>
970-596-3744


On Mar 3, 2018 5:54 PM, "August Goers" <aug...@luminalt.com <mailto:aug...@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" <solarcow...@yahoo.com
    <mailto:solarcow...@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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--
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net



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