For the closely spaced wheels of dual and dual-tandem legs and even for adjacent legs of aircraft with complicated undercarriages the effects of distributed loads from adjacent wheels overlap at the subgrade level. In such situations, the successful pressures are these combined from two or far more wheels and ought to be attenuated sufficiently by the pavement structure. Within a subgrade strength category the relative effects of two aircraft types on pavements can be uniquely stated with very good ...
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