Stresses in bridges. Tests made on the river severn bridge at sharpness, gloucestershire (E-140)

The permitted loading across the River Severn Bridge at Sharpness is "yellow'' locomotive" but it would be advantageous to increase this to "rod" locomotives Calculations indicate that the bridge could carry "red" engines at 3 revs. per second, without any strengthening to the girderwork. The Chief Civil Engineer Western Region...