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To what degree does a hole in a tube make it weaker?
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[QUOTE="Baluncore, post: 6034165, member: 447632"] The advantage of dual channel rails is that they will twist along the truck which reduces the stress when the truck crosses rough ground. If a tubular backbone chassis is used that has reduced flexibility, it will put much higher loads on the chassis and suspension components. The lowest weight chassis will be flexible and will not have a heavy spine or torque tube along the neutral axis. Dual channel rails also better support the sides of the load and so reduce axial torque and sway. For example, when vehicles are loaded on a tray truck the wheels bear down directly onto the two channel rails. Many trucks have a second channel section wrapped over the first. That increases local strength while retaining chassis flexibility. That double plating is only used where major loads are applied to the chassis channels. The tubular chassis must be reinforced where holes give access for drive shafts and where the wheel supports must be attached. If that is not done, the total weight of the tube will be significantly increased. [/QUOTE]
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To what degree does a hole in a tube make it weaker?
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