2" non-structural topping mix
2" non-structural topping mix
(OP)
It's a 2" non-structural topping over pre-cast floor planks. I am specifying 3000 psi concrete with, W/C = 0.40 and slump 4 +/- 1. But I am not sure about the reinforcement (WWM) to be specified. What would be a suitable choice?






RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
We typically don't design as composite unless necessary to reduce cost. I feel as though the increased labor cost to get the topping to act compositely with the precast often outweighs the small material increase. Also, often times on longer spans, the precast plank is cambered. When the non-structural topping is poured, its thickness often varies up to 1" from edge to center and therefore it is just more conservative to let the plank carry all of the loading.
RE: 2" non-structural topping mix
How do you attach it to get composite action? By doweling in rebar or shear studs of some sort?
RE: 2" non-structural topping mix
The camber note above is valid for longer spans. You can also have an issue at balconies or other sloped slabs where your topping slab thickness can get decreased.
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix
RE: 2" non-structural topping mix