What size are bison beams?
There are three beam types, which are produced in standard profiles of 150 x 125mm, 150 x 215mm and 225 x 135mm (depth x width) to give a range of capacities to suit all loading options. Beams are placed at appropriate centres depending on span and applied load.
What is the maximum span for a block and beam floor?
Introduction: Beam and block ground floors The concrete beams can span up to 8m without the need for subfloor walls, although a typical span is around 6m or less.
How thick is a bison slab?
100mm thick solid prestressed slabs can be used as permanent formwork for a cast in-situ balcony. We have 150mm thick solid prestressed slabs that incorporate top reinforcement to form the balcony and backspan slab as a single unit.
How far can precast concrete span?
between 25 and 45 feet
Precast, prestressed flat slabs are used in short span bridges. They typically have spans between 25 and 45 feet between supports. They can have a concrete or asphalt wearing surface cast onto the structure.
Who owns Bison precast?
Forterra
Acquired by Forterra in 2017, Bison Precast as it is now known – and which benefits from three manufacturing facilities at Swadlincote, Hoveringham and Somercotes – has continued to lead the way in concrete innovation and develop its expertise in offsite manufacture and Design for Manufacture and Assembly (DfMA).
What is bison block?
The Bison wall-frame construction system was a construction method used in tower block construction. It was launched in 1963 by Concrete Ltd who set up factories across the UK to pre-fabricate the parts it. It was not a frame structure as such, instead pre-cast concrete panels formed the structure of high rise blocks.
How long can concrete beams span?
Generally reinforced concrete becomes not economic with spans bigger than 10m. For bigger spans you use prestressed concrete and you can reach up to 150m span. Longer spans are generally done with composite steel concrete or only steel structures.
Do you need a DPM under a block and beam floor?
A DPM or concrete oversite in not usually required, unless needed for gas or vapour protection as per the Building Regulations. Some manufacturers do recommend a DPM over the beam and block floor before insulation – be sure to check manufacturers instructions.
What is a Bison slab?
Bison Precast is able to offer several solutions to incorporate balconies within a floor layout: additional reinforcement can be incorporated into hollowcore slabs to accept bolt-on steel balconies. 100mm-thick solid prestressed slabs can be used as permanent formwork for a cast in-situ balcony.
How far can hollow core slab span?
6-inch depth hollowcore plank: 22-foot spans. 8-inch depth hollowcore plank: 29-foot spans.
What is the maximum span of a slab?
Theoretically there is no limit on maximum length. But practically and economically they are restricted. A flat slab between span of 6.0 to 9.0m is economically feasible.
What is the maximum span allowed for an RCC slab without beams?
The pre stressed slabs are used, the depth of the slab can be reduced. The load is transferred to columns in proper reinforcement details. Hence practically a designer can avoid beams (the word used as a conventional one) for a span of 50m or even more.