Prelocate

Manufactured strain gage rosettes are now being used to prelocate the gages with respect to the proposed hole center.

Where sections are more than about 500 feet (152.5 m) apart, prelocate all cross sections on aerial photographs.

In addition, the green ventilation ducts which emerge at two points in the wall had to be cut into the mosaic, as it had not been possible to prelocate them.