The use of precast concrete products as floor plates, is relatively prevalent here. With the use of precast usage of formwork and scaffolding is greatly reduced thus saving implementation time. One floor is is produkprecast for precast hollow core slab.
Precast hollow core slab system using pre-tensioning prestressed cables which first pulled on a special holder that has been prepared and then do the casting. Therefore making precast products should place special fabrication that provides the holder in question. There is a hole in the middle plate effectively reduce weight naturally without reducing the capacity of bending. So it is relatively mild compared to precast slab solid even as the use of pre-stressing the capacity dukungngya greater.
The presence of a hole in the slab is very useful when applied to high-rise buildings because it reduces the weight floor. Just imagine, for a solid slab, thickness 120 mm only, the weight is about 288 kg/m2 is almost equal to the weight of life plans for an office of 300 kg/m2. Though only contribute forces to support the loading plate anyway (DL + LL).
Even the weight is going to be a major contributor magnitude earthquake forces. So if weight is reduced, the floor plan is also less earthquake loads.
Thus, the use of lightweight precast floor also reduces the risk of seismic hazard.