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Roll-off (dumpster)
A roll-off is a usually open top dumpster characterized by a rectangular footprint, utilizing wheels to facilitate rolling the dumpster in place. The container is designed to be transported by special roll-off trucks. Roll-offs are commonly used to contain loads of construction and demolition waste or other waste types. While most roll-off containers have a swinging door on the end for easier disposal of waste, some roll-off containers are not open top and are used with commercial or industrial trash compactors.
Construction debris may originate from a building site where something is being built, renovated, or demolished. Roll-off dumpsters are also used for various jobs that need much material to be taken away. The material in the roll-off may be taken to a landfill, recycled or disposed/recovered of in some other way.
== Size ==
Roll-off containers have a rectangular footprint typically determined by the size of typical trucks. Roll-off container sizes are determined by the amount of volume of debris they contain. Typical container sizes in the United States are 10, 15, 20, 30, and 40 cubic yards〔(【引用サイトリンク】 title=Roll-Off Box Sizes )〕 While the roll-offs may be rented by volume, there may be weight limitations. Weight limits may be necessary to ensure compliance with road-use and safety laws and regulations. (or 2-40 cubic meters in other nations).
Most roll-off providers will have a weight limit for each container size. Containers loaded with more weight than allowed typically result in an overage charge. The maximum weight is specified at the beginning of the job. In cases where the material to be disposed of is especially dense, such as concrete, a container with lower sidewalls is used, to help reduce the risk of exceeding the weight limit.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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