Conduit in Composite Slab
Conduit in Composite Slab
(OP)
On a job I am working on, the electrical eng wants to run conduit through our composite slab. It is 3" deck with 4 1/4" concrete over the deck with 3/4" DIA. 6" long studs. In areas where conduit runs, he shows each flute with 2 1" DIA conduits running parallel and on top of each rib anothe 2 1" DIA conduit. This seems unacceptable to me, but what is general consensus? Are there any papers written on this or code recommendations on spacing, placement and maximum daiameter conduits??? I looked through ACI but didn't see anything regarding conduits. Thanks






RE: Conduit in Composite Slab
MECHANICAL AND ELECTRICAL CONDUIT IN SUSPENDED SLABS SHALL RUN UNDER TOP LAYER OF SLAB REINFORCING. PROVIDE A MINIMUM OF 1 1/2" CLEAR BETWEEN CONDUITS AND BETWEEN REINFORCING AND ADJACENT CONDUITS PARALLEL TO REINFORCING. IF MAXIMUM SIZE OF CONDUIT EXCEEDS ONE THIRD OF THE SLAB DEPTH, CONTACT ENGINEER FOR ADDITIONAL FRAMING OR REINFORCING.
RE: Conduit in Composite Slab
Where i think this is a problem, is that the condiuts will need to converge at an electrical room, so you may get many condiuts spaced very close together.
RE: Conduit in Composite Slab
Our requirements are pretty stringent. A lot of times, the installer will have PVC priced, and won't want to bother, so they install under the deck (which is our preference). Using these requirements, we have not had any issues with our slabs related to embedded conduits.