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Skanska lands £450m Lower Thames Crossing deal

Construction Enquirer

The Kent Roads contract will deliver the southern part of the route that connects the A2/M2 to the tunnel approach, and includes almost four miles of new road and structures, one of the widest green bridges in Europe, a new public park, and 12 miles of new or improved pathways for walkers, cyclists and horse riders.

Deals 83
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STRUCTURAL USES OF PRECAST CONCRETE

The Constructor

Use of Precast Concrete in frames: There are two main types of precast building frame. The structural frame consists of slabs, beams and columns. Structural frames are mainly used for offices, car parks and retail developments. The cross-wall frame consists of floor slabs and solid walls. It is used mainly for hotels, schools and hospitals.

Concrete 233
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TYPES OF PRECAST CONCRETE CLADDING & FEATURES

The Constructor

This allows a greater performance from the cladding panel than simple building enclosure. Panels can be manufactured in many shapes and sizes, but mainly they are either storey height spanning from floor to floor, or spandrel panels forming a sill wall beneath windows.

Concrete 223
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TYPES OF PRECAST COMPONENTS IN A BUILDING

The Constructor

Precast Beams: There are two main categories of beams: Internal beams – where floor loading is approximately symmetrical External beams – where floor loading is predominantly non-symmetrical. The numbers of different types of components in these structures over the years have become very large.

Concrete 240
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TYPES OF CRACKS IN CONCRETE BEAMS

The Constructor

Cracks parallel to main steel in case of corrosion in beams 4. Cracks in concrete beams due to increased shear stress 2. Cracks in concrete beams due to corrosion or insufficient concrete cover 3. Cracks due to increased bending stress in beams 5.

Concrete 244
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HYBRID CONSTRUCTION TECHNIQUE AND STRUCTURAL.

The Constructor

Precast and in-situ concrete can be used together in many different ways to extend the design horizons for architects, engineers and contractors. Hybrid concrete construction can incorporate all the benefits of precasting, (e.g. economy, flexibility, moulability, continuity and robustness).

Concrete 214
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PERMANENT FORMWORK METHOD FOR BEAM CONSTRUCTION

The Constructor

Indeed some beams, particularly in seismic areas are designed to act both compositely and non-compositely in the same span. More efficiently, they can act compositely with the in-situ concrete.

Concrete 230