10.2.2.2 Other common methods of measuring deformations involve the use of micrometer dial gages or linear variable differential transformers attached to a suitable reference bar and bearing at the desired points on the beam. Mount the reference bar for supporting the deflection-measuring
apparatus on the beam above the two end supports at or close to the neutral axis. Deformations can also be determined by using a surveyor’s level and reading scales attached to the beam. In all cases, the method used shall compensate for any settlement of the reaction supports.