The other option is a wood structure with assumed 2 layers of 3 4 subfloor vapor barrier and then 2 3 of light weight concrete.
Lightweight concrete floor thickness.
The thickness of solid lightweight concrete floor system is determined according to the specifications of aci 318 14 as discussed in the following sections.
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The light weight concrete density is less because lightweight coarse aggregates and sometimes lightweight fine aggregates are used which make the concrete weigh less.
It is used in the construction of multistory buildings.
Plus rebar and concrete.
An example is lite deck which costs around 3 25 sqft of floor surface for the form.
Suspended floors have been benefiting from lightweight concrete for years as it reduces the weight on the structure and increases fire resistance.
This type of lightweight floor system is constructed by pouring lightweight aggregate concrete into the fixed forms of the concrete slab.
If one uses a lightweight concrete weighing 90 pounds per cubic foot a 1 1 2 inch thickness of this concrete weighs about 11 pounds.
Lightweight concrete after being placed in a drying oven at 230 9ºf 110 5ºc for a period of time sufficient to reach a density that changes less than 0 5 in a period of 24 hr.
Because lightweight concrete is typically thinner it is made.
Most notably renzo piano s the shard a marvelous 95 floor structure made of lightweight concrete that took only four years to build.