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A steel beam is made composite by using shear connectors

A steel beam is made composite by using shear connectors -...

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1. A steel beam is made composite by using shear connectors, composite metal decking and concrete is much stronger and stiffer than the base beam alone 2. In a composite floor system the concrete acts together with the steel to create a stiffer, lighter, less expensive structure 3. Connecting the concrete to steel beams reduces live load deflection i.e stiffer floors 4. Composite metal decking works together with the concrete fill to make a stiff, light-weight, economical floor system 5. Steel decking with deformed ribs (or embossed decking) is commonly used for composite floors, the deformations on the ribs allow for a stronger bond between the concrete and the decking. 6. Depending on the welding process used, the tip of the shear connector may be placed in a ceramic ferrule (arc shield) during welding to retain the weld. This bond allows the concrete slab to work with the steel beams to reduce live load deflection 7. The electrical arc process is commonly used for shear stud welding, an arc is drawn between the stud and the base metal 8. Concrete is installed by a concrete contractor on top of the composite metal decking, shear connectors, and welded wire fabric or rebar grid (crack control reinforcing). Pumping is a typical placement method for concrete being placed on metal decking 9. A standard steel cross section with L4x3x5/8 is an angle 10. C12 x 30 is a channel 11. W27 x 161 is a W beam 12. S18 x 54.7 is a S beam 13. A W27 x 161 is a W beam has a nominal depth of 27 in . and has a nominal weight per foot of 161 lb/ft 14. A L4x3x5/8 is an angle with one 4 in leg, one 3 in leg and having a thickness of 5/8 of an inch 15. A C12 x 30 is a Channel with a depth of 12 in and having a nominal weight per foot of 30 lb/ft 16. (Same answer as #13) 17. The primary connection methods for structural steel are bolting and welding. Bolting and welding may be used for shop connections and field connection. 18. A fabrication shop will have a desired fastening method suited to its equipment and fabrication methods: a) Field connections are typically bolted b) Welding may be used for field connections where bolting is either impractical
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