| 摘要 |
Large hollow curved beams and arches are inexpensively produced by curving individual shallow components, such as channels, that are then tiered to form a large laminated member. Smaller beams or arches can be made by tiering the components, curving them all at one time, then fastening them together. Individual layers of curved components are usually fastened together consecutively or in multiple laminations to construct a member with a much higher moment of inertia than the sum of the moments of inertia of the layers in a non-fastened state.
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