Beams are typically considered structural components and are made in one of three key shapes:
• Inverted Tee Beams
• Double Tee Beams
• Box Beam
Beams are horizontal components that support deck members like double tees, hollow-core, solid slabs, and sometimes other beams. They can be reinforced with either prestressing strand or conventional reinforcing bars. This will depend on the spans,loading conditions, and the precast producer’s preferred production methods.
Typical sizes: Practically any size needed to satisfy structural requirements
Typical depths: 16 to 40 in.
Typical widths: 12 to 24 in.
Typical span-to-depth ratios: 10 to 20 .
Finishes: Since beams are cast upright, the bottom, sides, and ledges are cast against a form and will typically be provided with an "as cast" finish that results in a smooth, hard finish. The top of the beam is troweled by the finishing crew and can be smooth, roughened to simulate the finish of supported double tees (as in a parking structure), or intentionally roughened to create a bond with cast-in-place concrete that may be poured on top.