Napier House, Essex

Preventing punching shear failure with flat slab construction is critical and while traditional solutions such as links in the punching area work fairly effectively, there are disadvantages. They are time-consuming to install and risk installation inaccuracy and positional stability during concreting. A product that does offer a cost-effective, easy-to-install solution, is the widely used and dependable Schöck Bole shear rail; and one of the many construction sites where Bole is the system of choice is the New Green project at Rainham in Essex, where two outdated 13-storey tower blocks are being replaced by mid-rise, high density buildings, providing 197 homes. As with any reinforced concrete slab design, the New Green project is at risk of punching shear failure, which traditionally has been resolved by adding further concrete, such as the use of downstand beams or localised thickened column heads. However these measures require complex formwork and significantly reduce the benefits offered by the flat slab design. By incorporating the Schöck Bole shear rail system, installation is cost-effective and significantly faster than traditional loose links. The ready-to-install reinforcement element consists of double-headed studs with spacing bars to ensure correct positioning.  Spacers allow installation on the formwork, making installation on the construction site and in the precast plant quicker, safer and easier to achieve. The dramatically reduced fixing time far outweighs any additional material costs that may be involved with a prefabricated system.