Concrete Slab On Metal Deck Detail

Transverse shrinkage cracking on the bottom of slabs.

Concrete slab on metal deck detail.

Aci 318 99 building code and commentary by american concrete institute june 1999. Reinforced concrete slab systems on steel decks decking can serve as form shoring and finished surface. These are typical shrinkage cracks that may be reduced by. Slab over the supports will pre ve n t the formation of tension cracks due to flexure when slabs are continu ous for two or more spans.

This differential shrinkage within the deck slab could be among other reasons one of the reasons for transverse cracking. We never use a copperhead or laser because of the potential for overloading the decks. The decking not only acts as permanent formwork to the concrete but also provides sufficient shear bond with the concrete so that when the concrete has gained strength the two materials act together compositely. For slabs on metal deck the goal often dictates the means and methods.

As a contractor therefore don t be afraid to talk to the engineer about all this. Click on the insert button to create a new layer and use the up and down buttons to move them into the correct order. For a metal or steel deck floor system you need to have 2 layers ie one for the metal deck and one for the concrete topping. We don t use a rail system says david buzzelli of texas a m concrete in houston.

Everything we do is unshored. We l d e d w i r e fabric is usually re c o m m e n d e d for tempera t u r e and shrinkage re i n f o rc e m e n t. We pin all our decks for thickness and wet screed them. The formation of light rust on the top side of the deck prior to concrete placement is common and does not adversely impact the deck or composite deck slab assembly.

On the function column to the left you can select from the drop down the appropriate category. In the composite deck worksheet since the composite deck is interlocked or engaged with the concrete the deck is. Engineers who design slabs on metal deck aren t thinking about the contractor. Composite slabs consist of profiled steel decking with an in situ reinforced concrete topping.

Designing with steel form deck by steel deck institute sdi 2003 steel deck and floor deck catalog by vulcraft corporation 2001. The standard gray primer is applied to the underside of the steel deck as compared to both sides for roof deck leaving the top side bare for concrete adhesion. Floor decking sheets is also known as profiled steel deck metal deck roof decking etc the earliest name of bondek is called corrugated steel deck and all steel floor decking sheets that are pressed and formed by a platen press and are collectively referred to the floor slab is made from galvanized steel sheet by cold roll forming and its cross section is v shaped u.