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武钢一米七热轧厂主厂房除主电室跨外,约13万平方米的屋面采用了12米柱距横向天窗和斜腹秆桁架式二合一檩条(以下简称“二合一”檩条)的方案。该厂房采用横向天窗的主要优点是: 1.热轧厂厂房处于东西朝向,可利用横向天窗改变采光方向; 2.热轧厂主厂房除部分为两跨外,其余均为连续五跨,选用横向天窗可使照度均匀并利于自然通风; 3.横向天窗利用平行弦屋架空间进行采光、通风,取消了约3～5米高的纵向天窗,降低了厂房
In addition to the main powerhouse of the main plant of Wuhan Iron and Steel Company’s one-millimeter seven hot rolling mill, about 130,000 square meters of roofing adopts a 12-meter-pitch lateral sunroof and a diagonal truss-style truss type combo bar (hereinafter referred to as “two in one” purlin). ) The program. The main advantages of the use of horizontal skylights in this plant are: 1. The east-west direction of the hot-rolling plant is in the east-west direction. The horizontal skylights can be used to change the lighting direction. 2. The main plant of the hot-rolling mill is divided into two spans, and the rest are continuous five-span. The horizontal sunroof can make the illumination uniform and conducive to natural ventilation; 3. The horizontal sunroof utilizes the space of the parallel string truss for lighting and ventilation, cancels the vertical sunroof of about 3 to 5 meters high, and reduces the factory building.