Bats without composite materials in the barrel can have any drop. Bats with composite barrels are permitted in Junior League but must meet the BBCOR .50 standard and be permanently labeled so.
In the example, our order is for 150 cubic yards of concrete with each truck carrying 10 cubic yards and unloading every 10 minutes. We further estimate that the travel time to the job is 20 minutes and that your plant takes 5 minutes to load a truck. Divers will check the load after batching, which takes 5 minutes.
The single axle holds 7 cubic yards or so and the maximum payload of a double axle is 20 Tons. Of course these are highway qualified trucks, and there are much larger off highway only trucks for use in construction and mining sites. Here it's usually four cubic metres or five and a third cubic yards.