Any info on "Robertson" 5 - 75 - 16 metal roof deck
2

Question

Any info on "Robertson" 5 - 75 - 16 metal roof deck

BrettUW (Structural)

(OP)

24 Mar 10 15:58

We're renovating and adding on to a building built in the 60's and the roof deck spans almost 27'-0". I'm concerned about drifting snow that our addition may add to the existing roof. Does anyone have information on this metal roof deck. It is 7 1/2" deep ... I'm assuming based on the callout that it is 16 ga deck. I can't seem to find any info on this so any help would be appreciated.

JedClampett (Structural) · Answer 1 · 2010-03-24 16:46:22

I've got a old Robertson Catalogue. It has a DC and ADC 7.5 roof deck that's made up of two sections welded together. There's eight combinations of 18, 16, 14 and 13 gauge plates. If it's 16/16, the top Sections Modulus is 4.56 in^3 for a 24 inch wide section and the bottom is 4.92 in^3. See the attached scan.

http://files.engineering.com/getfile.aspx?folder=4da7f051-878e-44da-ba88-5c

msquared48 (Structural) · Answer 2 · 2010-03-24 23:08:45

I've got an old Robertson Cataqlogue too.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

BrettUW (Structural) · Answer 3 · 2010-03-25 11:18:06

Thanks for the quick responses and for the scan from the catalog. The decking is very similar to this except that there is no pan at the bottom. Each inverted U shaped section of deck is connected at the bottom and you can see the voids from below ... it is very similar to Deep-Dek 7.5 by the Metal Dek Group. Is there anything else in the catalog without the 24" wide pan at the bottom?

JedClampett (Structural) · Answer 4 · 2010-03-25 11:45:52

Your wish is my command:

http://files.engineering.com/getfile.aspx?folder=aeb7b65b-c0bf-4c68-aba4-d2

BrettUW (Structural) · Answer 5 · 2010-03-25 11:47:34

RE: Any info on "Robertson" 5 - 75 - 16 metal roof deck

BrettUW (Structural)

(OP)

25 Mar 10 11:47

That's it ... thank you!

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Any info on "Robertson" 5 - 75 - 16 metal roof deck
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