I do not think they are required, but since the food trucks have heating and cooling elements, maybe they are more likely to have fires and can be used in the case of a fire to prevent further damage to the truck until the Fire Department arrives.
Freight trucks are 13'6". The delivery trucks are slightly shorter at around 11' or so.
the type that spray foam
Most semi commercial trucks or delivery trucks can be 50 ft long.
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Some trucks have much stickers. Others have not much sticker. I like stickers.
US postal delivery trucks are Grumman LLV trucks built on a GM chassis.
25000
100,000
Delivery trucks are useful for when you need to move house or just have some extra furniture to get rid or purchase. Their dimensions are around 23m long, 2.6m wide and 4.15m high.