How To Hang Conduit Below Roof Girders

Ceiling joists support whatever is directly above them.

How to hang conduit below roof girders.

How to hang ceiling joists. 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. Also hangers or other supports used to attach and support metallic. Notching posts lends itself well to cantilevered beam construction as does the practice of chamfering the corners of the deck.

3 4 inch conduit is used for more than five wires. 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. They also help to keep the. A pdf illustrating the basic strategies for connecting unistrut to bar joists is also available for download by clicking here.

If it is not a major effort i would recommend re routing the conduit by attaching it to structural steel other than roof deck. In order to install a cantilevered beam you must have enough clearance below the joists to install the beam. Codes have detailed rules regarding conduit size but generally 1 2 inch conduit is large enough for five or fewer wires. Use a metal conduit strap that corresponds to the conduit size.

Conduit or wiring be embedded within roof assemblies or placed directly below roof decks. The conduit should have been attached to strucutural members that support the roof deck and not the roof deck itself. Outdoors use intermediate metal conduit imc or pvc conduit. For most interior home installations emt also called thinwall is strong enough.

Step 7 attach a metal conduit strap on the conduit and onto the building within 3 feet of each box and every 10 feet horizontally or vertically.