An elevated concrete slab that is flat level of uniform t h i c k n e s s and at the speci fied elevation.
Elevated concrete slab on metal deck detail.
As the metal frame takes shape the metal pan deck is staged.
Millions of square feet of suspended concrete slabs are placed every year in the u s much of it on a structural steel frame and metal deck.
At 15 to 16 per square foot a concrete porch slab supported by a steel frame costs roughly the same as 5 4x6 treated syp decking installed on conventional pt framing.
On top of the steel frame we lay out a metal pan deck to support the concrete slab.
Saw cutting an elevated slab however doesn t create the same weakened plane that it does in a slab on ground.
When the designer specifies these slabs there is sometimes a misconception that it can meet the same requirements as a slab on ground.
That s why american co n c r ete institute aci tolera n c e documents spell out perm i s s i b l e va r iations in flatness leve l n e s s slab thickness and elevation.
Wide with six 3 in deep corrugations.
Laps are figure 1.
Once installed the concrete slab is ready for tile the most durable and cost effective deck surface in my opinion with minimal prep.
Even with these tolera n c e s how.
Composite slabs consist of profiled steel decking with an in situ reinforced concrete topping.
All three types of slabs may also be exposed to restrained drying shrinkage and thermal contraction that can cause cracks.
End elevated for dra i n a g e and pro tected from the elements with a wa.
Each pan deck panel is 36 in.
The reinforcing steel and steel deck either composite or noncomposite.
The panels are also puddle welded to the steel girders from above.
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 use when metal deck is used as a leave in place form 1 1 panel features and benefits 4 5d 12 4 5df 24 6d 12 6df 24 7 5d 12 7 5df 24 non composite deck 41 2 inch depth 12 inch coverage 12 foot to 21 foot span range no acustadek option allows for longest unshored spans for use when metal deck is used as a leave in place form.
They don t have any real design guidance concerning deflection or crack control or how the tolerances can be different between the concrete and the steel.
Floor details for sheets placed perpendicular to wall and parallel to wall and.
Decking sheets are usually lapped two inches at the ends.
Lloyd concrete services the contractor should ask the engineer if it s ok to run laser guided screeds on the deck.
The panels click together with a male and female seam on each panel.
Engineers who design slabs on metal deck aren t thinking about the contractor.
