In the above example, the capacity of the truck bed, 11.83 CY, is less than an even number of cubic yards, which is not acceptable. It should be an even number of cubic yards or slightly over. To ensure an accurate count of the cubic yards of aggregate for which the contractor is paid, the bed capacity must be expanded. The easiest method to accomplish this is to add sideboards.

By adding a standard

2x4

on top of the metal truck bed sides, the capacity can be increased to slightly over 12 CY, which would be acceptable as a 12 cubic yard truck. The addition of boards (

2x4s

or

2x6s

) is common practice. This is acceptable if the trucks do not exceed the gross vehicle weight established by law.