近年来在工业厂房屋盖系统的改革方面,涌现出一批新的天窗型式。其中某些天窗乃是将部分屋面沉于屋架下弦,利用屋架的空间高度从而构成了天窗。以其和厂房的纵轴的布置关系,又有纵向天窗、横向天窗、以及纵向与横向相结合的井式天窗之别。纵向天窗由于其上下弦屋面设置的部位不同,进而分成了下沉式天窗(图1)和凹形 In recent years, a number of new types of skylights have emerged in the reform of the industrial plant cover system. Some of these sunroofs are made by sinking part of the roof under the truss downstairs and using the space height of the truss to form the sunroof. With its arrangement relationship with the vertical axis of the factory building, there are vertical sunroofs, transverse sunroofs, and well-type sunroofs that combine vertical and horizontal directions. The longitudinal sunroof is divided into sunken sunroofs (figure 1) and concave shapes due to the different locations of the upper and lower roofs.