Hang Conduit Below Roof Trusses

Preparing roof trusses for hanging dry wall poses no particular difficulties but you need to understand the strength and stability limitations of drywall and plan your work accordingly.

Hang conduit below roof trusses.

It s part of the primary infrastructure of a lighting system and one of the unseen expenses of the system as well as one of the most dangerous parts. Screw down the panels using the pre drilled holes then continue across the roof until it is completely covered. Truss t hanger is the new industry standard for hanging pipe electrical hvac fire suspension and more in open web bar joist. If metallic conduit or wiring needs to be placed near the roof assembly nrca recommends it be positioned and supported at least 11 2 inches from the bottom side of the roof deck or substrate to which the roof system is applied.

Truss t hangers are shaped like a t and unlike traditional hanging systems are installed by going through the middle of the truss and then being locked into place by a coupling device. I want to go under the top member of the truss. The good news is that we illustrate 3 time tested techniques for connecting unistrut channel to bar joists below which means you can choose the strategy that best suits your specific needs. Compromised trusses can lead to severe structural problems such as bowing exterior walls sagging ridge lines and roof collapse.

Here s your code on rafters and trusses. Putting up runners or furring strips beforehand and planning for that in the design of the roof will usually solve the problem. Also hangers or other supports used to attach and support metallic. A pdf illustrating the basic strategies for connecting unistrut to bar joists is also available for download by clicking here.

R802 7 cutting and notching. Pipe truss and all of the equipment used to hang stuff from the building s structure is collectively called rigging and is one of the unsung heros of the lighting industry. The notching and boring rules for rafters are much different than the rules we ve learned for joists and studs. Conduit or wiring be embedded within roof assemblies or placed directly below roof decks.

If dead loads must be hung from trusses then extra support can be provided by installing support beams perpendicular to the trusses reducing the span of the bottom chords and increasing their ability to carry the weight load. Since mc cable can t be bent sharply minimum bend radius of 7x the cable diameter i was going to go under the top truss member and put a mc strap on. Notches in solid lumber.