stiffened grid type beam and slab foundation

Precast ribbed slabs are manufactured off-site under controlled conditions while cast-in-situ ribbed slabs are poured on site using formwork. The One-way Joist Slab can be constructed using precast or cast-in-situ methods depending on project requirements. It offers several advantages over other types of slabs including reduced weight due to the voids created by the ribs which also provide an efficient ventilation system for air conditioning ducts and electrical wiring. This type of roof slab is suitable for medium-span structures such as residential buildings, offices, schools or hospitals. The ribs are usually spaced at intervals of 400mm to 600mm and have a depth ranging from 75mm to 300mm. However, there are also some limitations when it comes to using this type of system such as limited flexibility in design due to its linear nature and difficulty accommodating openings like skylights or chimneys without compromising structural stability. They require less formwork than two-way systems which makes them more cost-effective. The main advantage of using one-way slabs on beams is their ability to span longer distances than other types of roof slabs while still maintaining structural integrity. They can be designed as simply supported or continuous depending on the span length, loading conditions, and other factors. One-way slabs are typically used in buildings with rectangular floor plans where the spans between supports are relatively long compared to their depth. The one-way slab is then placed on top of these beams, spanning between them and creating a flat surface for roofing.

This type of slab consists of reinforced concrete beams that support the load and transfer it to columns or walls.

One-way slabs on beams are a popular type of roof slab that is commonly used in construction projects.

Stiffened grid type beam and slab foundation