Composite Deck, 18 GA metal pan with Welded Rebar

[mayur]

Is there any valid theory to consider Metal pan (18GA) with welded rebar (#4) as a composite structure? This assembly may have been utilized for stair landing. Any input would be appreciated. Thanks!

 

[JAE]

Do you mean that the rebar is welded to the deck?

 

[jike]

There used to be a composite metal deck years ago that was plain deck with shear wires shop welded to it. I cannot think of the name of the manufacturer.

I would not trust any homemade or site made product that was not shop produced with tightly controlled welding procedures and certified manufacturer's test data.

 

[JAE]

jike - good point - for a composite deck system, the primary mode of failure is shear-bond failure of the concrete-deck interface. With a composite system, there would be this unknown limit state of when the bond would break - so you'd not be sure exactly what you would have in terms of capacity without the testing data for that particular deck/rebar combination.