Hollow-CORE SLABS SYSTEM

Hollow-core concrete slabs offer several advantages over insitu floor casting, including speed of installation, lower building costs and consistent quality levels –attributes not often found in one convenient package.

Structural pre-cast concrete floor elements are manufactured under controlled plant conditions at the same time as site foundation work is being prepared. When the site is ready, we can immediately commence with the erection of pre-cast components, dramatically shortening construction time. This reduces on-site congestion, financing costs, while accelerating the occupancy date.

Slabs are available in a standard width of 1200 mm, in thicknesses of 160 mm, 200 mm, 265 mm, 320 mm and 400 mm. Slabs are available in spans of up to 15 m (refer to individual manufacturers specifications concerning product specific criteria).

Due to the weight saving (up to a third or more), the use of high strength concrete (Minimum concrete strength after 3 days: 28 MPa; Minimum concrete strength after 28 days: 45 MPa), coupled with pre-stressing means that hollow-core slabs can achieve considerably larger spans than insitu reinforced concrete slabs of similar depths. Only a 40 mm leveling screed is required over the slab with a steel mesh.

The slabs can be used in the construction of virtually any type of building in which suspended floors or roofs are required. These include flats, hospitals, office blocks, hostels, factories, hotels, townhouses, schools, shopping malls, multi-storey car parks, culverts and reservoir roofs.

Hollow core has a smooth finished underside. The smooth ceiling provided by a hollow core slab requires only caulking of the longitudinal joints. Further more, it has good thermal insulation properties.

When using a hollow-core product, the installation is done by means of a mobile or tower crane, depending on the site conditions. The panels are lifted off the delivery trucks and placed onto their supports. Up to 500 m2 can be erected in a day with one team which enables the contractor to proceed with the balance of

the structure without being delayed by props and wet concrete. No storage space is required.

Why ?? HOLLOW CORE SLABS

Economical Advantages

1 .Substantial saving in over all cost of slab.

2 .Substantial reduction in building time.

3 .Substantial saving in labour &Machinery.

Technical Advantages

1 .High quality concrete.

2 .Pre stressed concrete section by using steel strands with certified strength.

3 .High elasticity modulus (1.3-1.5) times

than cast in situ Concrete.

4 .Good Thermal Insulation .

Versatility in Application

1 .Eliminating number of columns inside the building.

2 .flexibility in internal design.

3 .Fantastic solution for long spans.