Precast floor slabs such as Omnia and other elements with lattice reinforcement are used with a structural concrete topping.  At the slab edge, this needs an edge shutter, and there is often a requirement to incorporate cast-in channels into the edge as well.  One way of achieving this is to incorporate the channel into an edge shutter, which is incorporated into the precast during manufacture.  This is often the best way to provide a channel either for restraining cladding, or attaching a brick support angle.

The precast arrives on site with the edge trim and channel al incorporated.  By incorporating the shutter and the channels into the precast, several site operations are done away with.  This also removes the need for any site scaffolding, or working outside the slab edge.