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deflection. n. 1. the act of deflecting or the state of being deflected. 2. the amount of deviation. 3. (General Physics) the change in direction of a light beam as it crosses a boundary between two media with different refractive indexes.
Either way, reinforcing a beam improves safety and design effectiveness, and decreases deflection. Deflection is the tendency of a steel member to bend. Decreasing deflection creates a stiffer, stronger structural member. Both concepts are important in the operation of a steel beam.rill holes in the beam for the bolts that will connect the beam and the column. For residential use, they will typically be 9/16-inch diameter holes, so that 1/2-inch high-strength steel bolts can be used to connect the members.