Fittings for conduit passing through ceiling/floor

cablingconduit

A follow up to this question: Running Coax cable to the upper floor

If I cut a hole in the ceiling of my dining room and then another in the floor so I can run a conduit from the upstairs all the way to the basement, what should I use to secure the top and bottom of the conduit so it doesn't just fall through to the basement!

I need some kind of clamp (or maybe a bushing?) that will secure the conduit at the top (either on the ceiling of the dining room or the floor of the attic) and then again either at the floor of the dining room or the ceiling of the basement. I know I can clamp it to the wall (assuming I can find the stud), but it still seems like I should secure the top and bottom or else it could slide vertically out.

Best Answer

Depending on the type of conduit used, the codes for securing and supporting it are a bit different. In general, the conduit will have to be supported every 3-10 ft, depending on the type and size conduit used.

Fireblocking between floor may also be required.

International Residential Code 2012

Chapter 3 Building Planning

Section 302 Fire Resistant Construction

R302.11 Fireblocking. In combustible construction, fireblocking shall be provided to cut off all concealed draft openings (both vertical and horizontal) and to form an effective fire barrier between stories, and between a top story and the roof space.

Fireblocking shall be provided in wood-frame construction in the following locations:

4. At openings around vents, pipes, ducts, cables and wires at ceiling and floor level, with an approved material to resist the free passage of flame and products of combustion. The material filling this annular space shall not be required to meet the ASTM E 136 requirements