A B unit is normally a 1 ton cargo van,most companies require 2000 pound cargo capacity. A C unit is a small 6 wheel staight truck that has to have as a minimum a 12 foot cargo area and a 5000 pound cargo capacity.A D unit must have as a minimum a 20 foot cargo area and carry up to 13,000 pounds. A E unit is a tractor trailer combination., most companies stay with 48 foot trailers vs 53 foot due to the road restrictions on 53 footers. The most popular units in expediting are B and D units.
