Two loading tests have been performed on long span culverts using single axle loads up to 455 kN. The culverts were a 9.83 m span horizontal ellipse and a 7.47 m span high-profile arch with depths of cover to the crown of 1.90 m and 0.95 m respectively. Measurements of culvert deflection gave maximum values of 1 mm and 4.25 mm for the two sites with corresponding maximum bending strains of 10 and 170 microstrain: the maximum ring compression strains were 25 and 80 microstrain respectively. The results obtained from the loading tests are discussed in the context of the design methods available for long span corrugated steel culverts.

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