superload

plural superloads

1. A very heavy load.

   For loads over 500,000 lb (superloads), any other vehicles may not pass under the structure the permit vehicle is crossing.

   2006, Gongkang Fu, Clementine Fu, Bridge Rating Practices and Policies for Overweight Vehicles, page 75

   1 more example

   The superload permits were approved based on conservative analyses, recommending crossing of the bridge in two patterns[…]

   2011, Mohammed M. Ettouney, Sreenivas Alampalli, Infrastructure Health in Civil Engineering, page 434