Concrete slab on metal decking
Concrete slab on metal decking
(OP)
Is only anticracking reinforcement specified for these slabs? My problem is a steel building was purchased and the concrete slab and reinforcement were not specified for the metal pan decking. I have no literature on how to design such (one way) slabs . The span is 8 ft so I estimate that 6" max depth slab 4000PSI reinforced one layer of A193 mesh placed 1 " above the crests of the metal decking would be more than adequate.
Please provide some guidance. Thanks.
Please provide some guidance. Thanks.






RE: Concrete slab on metal decking
1) I'm assuming you're using composite decking. Even so, we never trusted the composite action, and added regular reinforcing (temperature and bending) whenever we used it.
2) Check your construction case. An eight foot span without shoring might not support the wet weight of six inches of concrete. If it can't, you probably should remind the contractor to shore the metal deck.
RE: Concrete slab on metal decking
Get a reference on designing it properly. Vulcraft will send you a free copy of their "Steel Roof and Floor Deck" design manual, which is very good and has all the information you need, including tables, specs, details and sample calculations.
RE: Concrete slab on metal decking
We have design hundreds of buildings using composite metal deck (2" 20 gauge as the standard) with 10 foot spans with not a single problem. These buildings are used for manufacturing, office, sensitive equipment, etc. I think adding deformed steel to a composite slab is being TOO conservative.
For what its worth
RE: Concrete slab on metal decking
Kieran
RE: Concrete slab on metal decking
For typical office floors, I agree with you - the composite deck itself is adequate tension reinforcing. However, some deck manufacturers warn that you should provide separate reinforcing for applications such as vehicular traffic or vibratory loads where there is a possibility of the concrete delaminating from the deck.
RE: Concrete slab on metal decking
The one time you may need rebar, is in designing for diaphragm action, especially with a long narrow floor that is not adequately connected to the supporting steel framimg for enough shear.
Hope this helps...
RE: Concrete slab on metal decking
RE: Concrete slab on metal decking
What do you do about strength design for fire resistance in you provide no bonded reinforcing steel?
RE: Concrete slab on metal decking
I'm not sure I understand your question. Do you want to know what is done for strength design and fire resistant rating? Or is you question related to strength design with a fire/high temperature application?
Please clarify - and maybe start a thread.