少妇出轨乱人伦_少妇无内裤下蹲露大唇92_精品国精品国产自在久国产应用_亚洲不卡一区在线观看_91激情影院_国产小视频一区_久久久这里有精品_黄色片视频免费观看_亚洲涩涩爱_91精品视屏

Lattice columns are used as compression-bending steel structure components, and are mostly used for plant frame columns and independent columns. The cross-sections are generally section steel or steel plates designed with biaxial symmetry or uniaxial symmetry. The components of the lattice system are composed of limbs and binding materials. The limbs mainly bear axial force, and the binding material mainly resists lateral force (relative to the axial direction of the limb). Lattice column binding materials mainly include strips and panels. The structural feature of the lattice column is that the material area is arranged far away from the axis of inertia, which can ensure the bending resistance of the reinforced member under the same axial resistance condition and save material.