10.2.2 Deformation Readings:
10.2.2.1 Deformation readings can be obtained in a number of ways. One of the simplest methods is by use of a taut wire placed along the length of the beam. When a taut wire is used, the mountings for the wire should be above the two end supports on the beam at or close to the neutral axis. Maintain a reasonably constant tension on the wire by means of pulleys and weights, springs, or by other suitable means. Take readings from a scale and mirror attached to the beam at the measurement points. Read the scale by lining up the taut wire with its reflection in the mirror.