Horizontal Formwork Systems: Hand-Set Systems
Horizontal formwork systems are used to temporarily support horizontal concrete work such as concrete slabs. There are seven horizontal forming systems that can be used to support different slab types. They are: (1) conventional wood system (stick form), (2) conventional metal (aluminum) system (improved stick form), (3) flying formwork system, (4) column-mounted shoring system, (5) tunnel forming system, (6) joist-slab forming system, and (7) dome forming system. Joist-slab and dome forms are steel or fiberglass pans usually placed above the plywood sheathing and thus can be used with any of the first five horizontal formwork systems. As a result, they will not be considered in this book as separate systems.
Formwork systems for horizontal concrete work can be also classified into two main categories: hand-set systems and crane – set systems. Conventional wood systems and conventional metal systems are classified as hand-set systems. In hand-set systems, different formwork elements can be handled by one or two laborers. Flying formwork systems, column-mounted shoring systems, and tunnel formwork are classified under crane-set systems. In crane-set systems, adequate crane services must be available to handle formwork components.