Hang Conduit Below Roof Trusses

A pdf illustrating the basic strategies for connecting unistrut to bar joists is also available for download by clicking here.

Hang conduit below roof trusses.

Screw down the panels using the pre drilled holes then continue across the roof until it is completely covered. I want to go under the top member of the truss. The mc cable is 7 16 thick the space between the top of the truss and the roof is 1 1 2 2x4 on its side minimum space per the nec is 1 1 4. 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.

Also hangers or other supports used to attach and support metallic. Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses. 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.

Here s your code on rafters and trusses. Truss t hanger is the new industry standard for hanging pipe electrical hvac fire suspension and more in open web bar joist. Structural roof members shall not be cut bored or notched in excess of the limitations speci fied in this section. Putting up runners or furring strips beforehand and planning for that in the design of the roof will usually solve the problem.

Compromised trusses can lead to severe structural problems such as bowing exterior walls sagging ridge lines and roof collapse. R802 7 cutting and notching. 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. Notches in solid lumber.

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. 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. 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.