Ultralintels are made of high strength concrete under strict quality control. They are manufactured in four convenient sizes to suit all standard and modular bricks and are easily rendered or covered with gyprock internally. They are fire rated under load in accordance with AS 1530.4-1990 and are non-corrodible and thus ideal for marine and industrial exposure conditions. They can also be used in pier and beam situations for new house foundations and also for re-cladding of existing houses. Lastly they are good for use in creating an upstand (“hob”) on a concrete slab.