What is a Bison unit?
Prestressed hollowcore units form part of the comprehensive range of precast concrete ooring products from Bison Precast. Hollowcore has excellent sound reducing qualities and inherent fire resistance making it the solution of choice for specifiers of floors for apartments, care homes and commercial projects.
What is hollow core floor?
Hollowcore floor planks are precast concrete elements with continuous longitudinal voids providing an efficient lightweight section. Hollowcore planks may be used to produce a diaphragm to resist horizontal forces, either with or without a structural topping.
What is a precast floor slab?
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 big are precast concrete slabs?
Typical sizes are 12 ft (3.7 m) wide and 8 ft (2.4 m) to 12 ft long. Panels can be made up to 20 ft (6.1 m) long or even longer. The construction process starts with cutting out the existing pavement repair area.
What are precast concrete panels?
Precast Concrete Manufacturing Precast concrete is created off-site using a mold. Precast concrete is poured into a wooden or steel mold with wire mesh or rebar. This mold may also have prestressed cable, if needed. It is cured in a controlled environment — usually at a plant.
What is hollow core precast concrete?
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. Slabs in prestressed concrete are usually produced in lengths of up to 200 meters.
How much does hollow core concrete 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 are precast floors classified?
Types of precast concrete floors Precast floors can also be classified according to their manufacture into totally & partially precast floors. Totally precast concrete floors are composed of units, which are totally cast at the plant.
What is the average span for precast hollow core concrete slabs?
Hollow-core slabs are economical, have good fire resis- tance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. Common depths of prestressed hollow-core slabs range from 6 to 10 in. (150 to 250 mm) for spans of approxi- mately 30 ft (9 m).
What is a group of bison called?
herds
Bison are social creatures and live in groups called herds. A herd usually contains females and their offspring.
What are the specifications for a b bison hollow core slab?
Design to other classifications is as agreed in the contract. contract Durability: The standard B Bison hollow core slab is designed to comply with the durability ollow requirements of BS 8500.
How big is a Hollowcore flooring unit?
The Bison Precast range of hollowcore units is available in 150, 200 and 250mm deep sections and can be supplied nationwide, either on a supply and install basis by specialised teams from Bison Precast, or supply only for installation by the main contractor.
What are the dimensions of a hollow core?
Hollow core units are nominally 1200mm wide, of rectangular cross section with a series of longitudinal cores through the section to provide a weight saving to improve structural performance performance.
What should the span be for bison precast flooring?
Bison Precast hollowcore units exhibit an upward curve known as camber which is a result of the compressive force near the bottom generated by the prestressing tendons. An allowance of span/300 should be taken into account in floor finishes or bearing levels.
