Injection formed polypropylene troug and waffle moulds were originally released to the market as a cost-efficient and high bearing power solution for ribbed concrete floor in the construction industry by GKN 50 years ago. The utilisation area has gradually expanded until today, and they have become a moulding system that is in use almost all over the world. Still known as troug and waffle mould products are produced and commercialised by Lam Plastik with a wide range of products.