 Medium duty squad trucks can range from smaller fire engines specifically designed for extrications to International truck cabs and chassis.Class III, or heavy duty squad trucks are usually the dimensions of a full sized fire engine and often include more exotic tools such as cascade systems and plasma torches.The tools and equipment listed below are tools found on squad trucks, though the size, amount, and combination of these tools depends on both the size of the truck and the needs of the community in which the truck serves.