Deliveries and collections for pallet networks (Palletways, UPN, etc) tend to range from private residental addresses and town centre shops all the way up to factories, warehouses, etc.
Types of load can be, errm, anything that will fit on a pallet, ranging from pet food all the way up to dumpy bags of gravel weighing over 1 tonne or more, which you have to tip with nothing else but a pump truck and a tail lift, which can be murderous sometimes! 
However, most commerical addresses will be in possesion of a fork truck, so just a simple case of opening the curtain(s) and letting them whip the pallets on or off the wagon.