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Beams and beam structures
A beam is a structural element that primarily resists loads applied
laterally to the beam's axis. Its mode of deflection is primarily by
bending. The loads applied to the beam result in reaction forces at the
beam's support points.
A statically determinate beam, bending (sagging) under a
uniformly distributed load

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CLASSIFICATION OF BEAMS
BASED ON SUPPORTS
1 Simply supported beam - a beam supported on the
ends which are free to rotate and have no moment
resistance.

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Fixed - a beam supported on both ends
and restrained from rotation.

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Over hanging - a simple beam
extending beyond its support on one
end.

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TRUSSED - A BEAM STRENGTHENED BY ADDING A CABLE
OR ROD TO FORM A TRUSS.

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Cantilever - a projecting beam
fixed only at one end.

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Continuous - a beam extending over more than
two supports.

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Classification of beams as Geometry
1. Straight beam – Beam with straight profile

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2. CURVED BEAM

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BASED ON THE SHAPE OF CROSS
SECTION:
1. I-beam – Beam with ‘I’ cross section

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T-beam – Beam with ‘T’ cross section

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C-beam – Beam with ‘C’ cross section (Channel)

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BASED ON EQUILIBRIUM CONDITIONS:
1 Statically determinate beam – For a statically
determinate beam, equilibrium conditions
alone can be used to solve reactions.

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STATICALLY INDETERMINATE BEAM
In Statically Indeterminate beam, equilibrium conditions are
not enough to solve reactions. Additional deflections are
needed to solve reactions.

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