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
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 /
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