Why are hollow core slabs used?
slabs have been used in a variety of structural ap- plications, including residential and commercial buildings, parking structures, and short-span bridges. The slabs contain voids that run continuously along their length, which helps reduce dead weight and material cost.
What is the thickness of the hollow core slabs required?
The slabs are typically 120 cm wide with standard thicknesses normally between 15 cm and 50 cm. Reinforcing steel wire rope provides bending resistance. Slabs in prestressed concrete are usually produced in lengths of up to 200 meters.
What are two advantages of precast hollow core concrete planks?
There are several advantages of the precast hollow core slab or prestressed hollowcore slab such as: heavy weight capacity, exceptional fire resistance, lower self-weight, superior acoustic insulation and thermal properties, cost-effective construction solution, offers better designing flexibility to builders , rapid …
What is hollow core floor?
Milbank hollowcore floors (also known as slabs or planks) are pre-stressed concrete slabs with internal tubular voids, creating an efficient and lightweight plank that is far lighter than other floor slabs of equal thickness or strength.
How far can hollow core slab span?
8-inch depth hollowcore plank: 29-foot spans. 10-inch depth hollowcore plank: 35-foot spans. 12-inch depth hollowcore plank: 40-foot spans. 16-inch depth hollowcore plank: 50-foot spans.
How are hollow core slabs installed?
THE HOLLOW-CORE SLABS WILL BE INSTALLED BY USING A SPREADER BEAM AND LIFTING CLAMPS. MAINTAIN EYE OR RADIO CONTACT WITH THE CRANE OPERATOR. TIGHTEN AND LOCK THE SAFETY CHAIN WHEN THE HEIGHT OF THE SLAB IS LESS THAN 100 MM. DO NOT LIFT A DAMAGED SLAB.
What are the advantages and issues of hollow core slabs precast system?
Hollow core slab Advantages: Hollow core ribbed slab not only reduces building costs it also reduces the overall weight of the structure. Excellent fire resistance and sound insulation are other attributes of hollow core slab due to its thickness.
What is hollow block slab?
Introduction: Hollow block and Ribbed slabs are formed by placing blocks on the slab and concrete ribs. In case of hollow block slab voided blocks are placed to reduce the total weight of the slab .
How much does a hollow core slab cost?
Maximize space in any house plan for approximately $20 per square foot with Hollowcore Roof and Floor Systems from County Materials. Hollowcore systems are prestressed concrete plank that serve as both a readymade sub floor for a garage, and a ceiling for additional living areas.
How wide are hollow core planks?
The planks are manufactured on 500-foot-long steel beds in standard widths of 48 inches and thickness of: 8, 10, 12 and 16 inches.
How much are hollow core slabs?
What is hollow core slabs or corefloor?
A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multi-story apartment buildings.
Where should hollow concrete blocks be used?
Hollow blocks are often used to build large structures like boundary fences. The reduced volume of concrete used to make each block adds up to a significant savings in cost for the materials for the whole wall. Their lighter weight also makes them easier to lift.
What is hollow core construction?
Definition of Hollow Core in Construction. The term hollow core is normally used to describe a construction product that has a core that is not filled. For example a hollow core door, is a door that is a molded shell of material, such as vinyl or fiberglass and is not filled with anything other than air.
What are hollow concrete blocks?
Hollow Concrete Blocks. Hollow concrete block is considered an economical alternative to solid concrete block. It can also be used in place of poured concrete (also known as cast-in-place concrete) or traditional wood or steel framing. Concrete blocks allow builders to construct some types of structures more quickly and economically due to…