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<p>I can see that the TJI manu doesn't want us blowing 3/8" lags
through the top chord of their engineered system. On the other
hand, it IS designed to have nails and at least deck screws put
into it, as that's how the builder attaches the roof decking. It
seems that William's measured approach is (as usual) good advice.
I think that multiple 1/4" lags with predilled holes might be
acceptable, but that would be up to the engineers and AHJ. My
issue with the EZ feet is that you are entirely dependent on how
well the roof decking was installed. Nails and construction
staples don't have great pull out resistance, so I would hope that
the builder uses some type of rated screws to attach the decking.<br>
</p>
<p>Ray Walters</p>
<p>Remote Solar<br>
</p>
<br>
<div class="moz-cite-prefix">On 3/3/18 10:52 AM, William Miller
wrote:<br>
</div>
<blockquote type="cite"
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d">Jerry:</span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d">We
have successfully used the DPW EZ-feet on sheet metal,
cathedral roofs with TJI rafters. The cathedral roof made
it impossible to install blocking. </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d">The
EZ-feet is supposedly rated to screw solely to roof
sheeting. When we first investigated the product, we
discovered the fasteners recommended were not properly rated
for sheeting thickness ranges. I understand DPW corrected
this. </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d">Nonetheless,
we used the EZ feet and used longer sheet metal screws where
the foot landed over the TJI. This way we were not using
fasteners quite as large in diameter as a lag and we gained
the rating for the screws into sheeting that don\u2019t lie over
the rafter.</span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d">William
Miller</span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><img
id="Picture_x0020_1"
src="cid:part1.B139A7F3.5ECA25B3@solarray.com"
alt="Gradient Cap_mini" class="" height="35" width="80"><br>
Lic 773985<br>
<a href="http://www.millersolar.com/"
moz-do-not-send="true">millersolar.com</a><br>
805-438-5600</span></p>
</div>
<p class="MsoNormal"><span
style="font-family:"Arial","sans-serif";color:#1f497d"> </span></p>
<div>
<div style="border:none;border-top:solid #b5c4df
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
RE-wrenches [mailto:<a
href="mailto:re-wrenches-bounces@lists.re-wrenches.org"
moz-do-not-send="true">re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Jerry Caldwell<br>
<b>Sent:</b> Friday, March 02, 2018 1:24 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] TJI rafters</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Dear
Wrenches,</span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">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. </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">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.</span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Any
advice would be appreciated here.</span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Thank
you,</span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> </span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Jerry
Caldwell</span></p>
</div>
</div>
</div>
<br>
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