This is a type of slab that is constructed with hollow clay pots or blocks. Hollow clay pot slabs are usually constructed with fewer concrete and reinforcement compare with solid slab. Hollow blocks are used to fill portions of the slab thickness; this results in deeper the amount of concrete and hence the weight of the slab. Hollow floors, which floor system in Office buildings, auditoriums, hotels, commercial buildings, residential dwellings, houses of worship, nursing homes and educational facilities, are all ideal applications. This is because of the advantage it gives in large span and of course its aesthetics cannot be compared to that of the solid slabs. In either way, floor slabs could be fabricated off- site (as pre-fabricated or pre-cast) The eventual on-site assemblage of these slabs will require newer technology and methods.

The Hollow slab construction method involves the following:

• Formwork construction: This is done either by laying the formwork to cover the floor area and then lay the pots on them, or laying the formwork just directly under the ribs of the pot.
• Laying and arrangement of hollow blocks: This is done according to the structural drawing.
• Placing of reinforcement: for ribs and concrete topping.
• Pouring of concrete: workable Concrete and compaction by the use of vibrator.
• Curing: Curing of the slab for 28days to attain its design strength.
• Removal of formwork: This is done after 28days of curing

-Reduced material usage (reinforcement and concrete): The quantities materials require such cement, gravel, sand and reinforcement are minimal. Also, the form work area is reduced. As a result of this, workmanship force and cost are minimal.

-Decrease in construction time: As a result of the simplicity of its construction and reduced quantity of materials and labour required, the time require for its construction is less but requires technicality

-Enhance structural efficiency: Due to its less weight property, total load of the building on the foundation is reduced thereby reducing the complexity of the foundation at design stage. it also good as fire resistance and sound insulator.