Concrete Raft Floor Construction

Then a waterproof plastic sheet is laid over the earth and a thin 3 layer of plain cement concrete pcc is poured just to create a perfectly flat and level base for the foundation.

Concrete raft floor construction. Common mistakes in concrete floor slab construction can be avoided with proper base preparation mix design placement finishing and curing. A raft foundation spreads the weight of the building over the whole ground floor area of that building. Standard concrete floor slab thickness in residential construction is 4 inches. Raft foundation is also known as mat foundation.

They offer considerable benefits over conventional block base type slabs at significant cost savings reduced construction time increased strength and superior insulation. Ready super slab is an above ground engineered raft foundation system commonly known as a raft foundation pod floor waffle slab or floating foundation that delivers real benefits over a conventional concrete floor and foundations. Each slab structure is designed for a specific span load and is priced accordingly. Here is a breakdown of the average prices for the different reinforced concrete slab.

A raft foundation is a reinforced concrete slab under the whole of a building or extension floating on the ground as a raft floats on water. The concrete slab price is determined by the tonnage of steel and concrete required to construct the slab or concrete structure. Rafts are most suitable when the ground is of good load bearing capacity and little work is required to get a solid foundation. Raft slabs are now a well established and proven type of concrete floor slab.

Typically a thickened reinforced area is created at the perimeter of the raft to form an edge beam supporting the external walls of the building. Each raft slab is engineer designed to suit onsite conditions. This type of foundation spreads the load of the building over a larger area than other foundations lowering the pressure on the ground. The raft is laid on a hardcore or scalping bed and usually thickened at the edges especially in very poor ground.

The raft foundation is a very commonly used type of foundation system. Ribraft floors are an innovative method of raft concrete floor construction is quick and efficient to lay it offers excellent insulation benefits and is seismically strong. This is an alternative if you can t use a traditional strip or trench fill foundations. Definition of raft foundation along with working principle when to choose raft types of raft foundation materials of raft foundation raft construction steps etc are discussed below.

Concrete slab raft foundation pricing. Insulation will generally be laid on top of the raft with a concrete floor or raised floor above. An engineered raft foundation and flooring system that offers real benefits over a conventional concrete slab.