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近几年来,广大的集镇、农村兴建了许多电影院、礼堂、俱乐部、仓库、中小型厂房、农民(居民)住宅,其中有不少采用的是钢木屋架。钢木屋架的特点是:上弦为木料(圆木或方木),下弦为钢材(圆钢筋或型钢),中间腹杆当为受压杆时用木料,为受拉杆时用钢材。因为木材受压性能好,受拉性能较差,所以钢木混合使用,取长补短,各尽所能,正因
In recent years, a large number of towns and villages have built many cinemas, auditoriums, clubs, warehouses, small and medium-sized factories, and peasant (residents) houses. Many of them use steel trusses. The characteristics of steel truss truss are: the upper chord is wood (round wood or square wood), the lower chord is steel (round steel bar or section steel), the middle web bar is made of wood when it is a compression rod, and steel is used when it is a pull rod. Because wood has good compressive properties and poor tensile properties, steel and wood are mixed and used to make up for weaknesses.