Forms were removed at approximately 18 hours of concrete age, and the beams were instrumented with demountable
mechanical (DEMEC) gauge points before strand tension was released at approximately 24 hours. Gauge
points were placed at the level of the prestressing steel using fast-setting epoxy beginning at 1 in. (25 mm) from
each end of the beam and then at 4 in. (100 mm) increments for the first 60 in. (1525 mm) from each end. This
allowed for overlapping 8 in. (200 mm) gauge lengths in the area of prestress transfer. Five additional gauge points
spaced at 4 in. (100 mm) increments were placed with the center gauge point at the midpoint of each beam to monitor
length change in the area of constant prestress