A brief detailing about simply supported beams, continuous rectangular beams and cantilever rectangular beams. Learn more about beams detailing.

Carries transverse external loads that cause bending moment, shear forces and in some cases torsion

Concrete is strong in compression and very weak in tension.

Steel reinforcement is used to take up tensile stresses in reinforced concrete beams.

Mild steel bars or deformed or high yield strength deformed bars (HYSD)

HYSD bars have ribs on the surface and this increases the bond strength at least by 40%

Drawings generally include a bar bending schedule

The bar bending schedule describes the length and number, position and the shape of the bar

Anchorage in steel bars is normally provided in the form of bends and hooks

The anchorage value of bend of bar is taken as 4 times the diameter of bar for every 450 bend subjected to maximum of 16 times the diameter of bar.

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The beams are classified as:

According to shape: Rectangular, T, L, Circular etc.

According to supporting conditions: Simply supported, fixed, continuous and cantilever beams

According to reinforcement: Singly reinforced and doubly reinforced

Minimum cover in beams must be 25 mm or shall not be less than the larger diameter of bar for all steel reinforcement including links.

Nominal cover specified in Table 16 and 16A of IS456-2000 should be used to satisfy the durability criteria.

Generally a beam consists of following steel reinforcements:

Longitudinal reinforcement at tension and compression face.

Shear reinforcements in the form of vertical stirrups and or bent up longitudinal bars are provided.

Side face reinforcement in the web of the beam is provided when the depth of the web in a beam exceeds 750 mm. 90.1% of the web area and shall be distributed equally on two faces at a spacing not exceeding 300 mm or web thickness whichever is less)