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Determination of Bending Moment in Beam



model beam, weights, deflection gauge, hangers.


The purpose of this experiment is to record the deflection in beam experimentally and then compare it with theoretical value.


  • Take a beam model and place it on a table in such away that it should be horizontal and firm.

  • Record the length and cross section.

  • Set the deflection gauge at a point where the deflection is to be measured.

  • Bring deflection gauges value to zero before the application of load on the bar.

  • Now apply load with the help of weight hangers

  • Record loaded weight its location from left side of the beam.

  • Record deflection when first of all the smaller dial has rotated.

  • Each division of main dial is 0.01mm

  • Also record deflection at any other point record location of that point and value.

Find the moment by = ML2 / 12 ET


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