Steel Fiber Reinforcement for Composite Steel Deck
Steel fibers have been used in composite steel decks for over 15 years. The Standard for Composite Steel Floor Deck Slabs (ANSI/SDI C-2011) governs the materials, design, and erection of composite slabs utilizing cold formed steel deck functioning as a permanent form and as reinforcement for positive moment in floor applications in buildings. Steel fibers are used for temperature/shrinkage reinforcement in these buildings. In these applications, any concrete floor cast on a metal frame and deck system is severely restrained from movement. When the concrete shrinks, the steel frame does not. This restraint causes tensile stress to develop in the concrete, which leads to shrinkage cracks. CFS 150-5 or 100-2 fibers are the best way to control shrinkage cracks in composite steel decks.
The use of steel fibers in multi-story applications was made possible by International Building Code 2015 (IBC-2015), adopting SDIC-2011, allowing for the use of steel fibers in place of welded wire fabric to control temperature and shrinkage cracking in composite metal deck applications. Fiber-reinforced concrete can be poured and finished in the time it takes to set wire mesh on deck, and while cranes are required to hoist rebar to each floor, concrete fibers are simply pumped with the concrete, eliminating a major expense.
Additionally, wire mesh is a major job site tripping hazard and extremely difficult to install and keep in place in a way that effectively reinforces the concrete. Steel fiber is preferred over wire mesh for its ability to better control cracking and therefore improve performance and finish. Unlike welded wire mesh, which is located in a single plane and therefore allows cracks to grow until they meet this plane, steel fibers are distributed uniformly throughout the concrete matrix to meet micro-cracks where they originate.
Data Sheets and Guide Specifications