Winsteel/Alpi’s Tunnel Form is a Formwork System which allows you to cast cellular walls and slabs in one operation on a daily cycle. The system creates an efficient load-bearing structure for use in a wide variety of applications. It combines the speed, quality and accuracy of onsite production with the flexibility and economy of in-situ construction. This approach is recognized as a contemporary method of construction. The result is a cellular reinforced concrete structure; the surfaces of which are of sufficiently high quality to require only minimal finishing for direct decoration.