One-way slab or steel on metal deck?
One-way slab or steel on metal deck?
(OP)
I am designing an underground corridor which connects two buildings. The walls are reinforced concrete basement-type retaining walls. The floor is a concrete slab on grade. There is about 2 feet of soil above the roof of the tunnel. I am trying to decide if the roof should be a one-way concrete slab or structural steel with slab on metal deck. Does anyone have any recommendations/suggestions for the roof of this underground structure? Is it better to provide a one-way slab or steel with slab on metal deck? Thanks in advance.






RE: One-way slab or steel on metal deck?
Whichever system you use, make sure of the waterproofing, and protection for the waterproofing, before the backfilling is done.
RE: One-way slab or steel on metal deck?
RE: One-way slab or steel on metal deck?
RE: One-way slab or steel on metal deck?
RE: One-way slab or steel on metal deck?
RE: One-way slab or steel on metal deck?
RE: One-way slab or steel on metal deck?
a) I assume that there will need to be a waterproofing membrane on the top of the concrete to prevent leakage into the space below, but it is not good practice to apply a waterproofing membrane to concrete that cannot breathe on the opposite side; most waterproofing manufacturers / contractors will not give any warranty for this condition (see CSA S413);
b) eventually all waterproofing leaks and this will lead to corrosion of the steel deck.
RE: One-way slab or steel on metal deck?
Am with Chicopee and AJK1, Structure is one consideration, waterproofing a very important as well. I have seen large concrete garages with serious water problems. If posible, design it with at least some slope for drainage and a very good waterproofing detail. Arched would be best...I think.
RE: One-way slab or steel on metal deck?