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Steel Roof Deck Designation

Steel Roof Deck Designation

Steel Roof Deck Designation

(OP)
I am reviewing a project that has a 7 1/2" deep steel roof deck. The thickness is indicated as 14-16. Is anyone familar with this designation? Thanks.

RE: Steel Roof Deck Designation

Canam Steel Corporation manufactures 7 1/2" deep steel roof deck. Their designations are H7.5, HA7.5, and LS7.5. I have not specified it recently, but Epic Metals used to make 7 1/2" deep steel roof deck.

RE: Steel Roof Deck Designation

Well first thought is 14 or 16 gage thickness - I can't see that the deck would vary in gage thickness...such as a different thickness on top vs. bottom or something like that.

RE: Steel Roof Deck Designation

Could be a cellular deck 7.5" deep with 14 gauge over a flat sheet of 16 gauge, but I don't think it is a safe assumption without checking the actual deck.

BA

RE: Steel Roof Deck Designation

(OP)
BA it is a 7 1/2" cellular deck but I can't find info on the thickness. Obviously either 14 or 16 gauge. Called the supplier and they didn't know either.

RE: Steel Roof Deck Designation

I think it is a QL deck made by Robertson, pan deck with a mix of 14 and 16 gage like BA said. Was used to provide electrical / mechanical chases in the floor. Seem to recall the nomenclature...

I don't have my catalog with me but will check on Monday at the office.

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: Steel Roof Deck Designation

ron9876, I am wondering if the 16 gauge refers to the liner panel and the 14 gauge refers to the 7.5" deep structural deck, but I don't know if that is the case, so it would be necessary to measure the materials on site.

BA

RE: Steel Roof Deck Designation

Sorry, but nothing by that description in Roberston. They had a 3" pan with a 4.5" overlay of concrete for a 7.5" total thickness of the structural system, but no stopped at 16/16. No 7.5" deep pans and no 14/16.

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: Steel Roof Deck Designation

Good find, JAE.

BA

RE: Steel Roof Deck Designation

(OP)
Thanks JAE. That is the type of deck. I believe it means that the bottom is 14 ga. and the upper section is 16 ga. Thanks again.

RE: Steel Roof Deck Designation

ron,
Since the 14-16 is heavier than the 16-14, I think the pans in the 14-16 would be 14 gauge, and the bottom cover 16 gauge. Looks like you need the next page for the load tables.

RE: Steel Roof Deck Designation

I agree with hokie. Another convincing reason is that the maximum allowable reactions are identical for the 14/14 and 14/16.

BA

RE: Steel Roof Deck Designation

I don't recall if there are load tables for this after the page I posted but you can access the whole document at slideruleera's site that I linked to.

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