Combining with the steel structure characteristics of portal rigid frame light house, taking specific project for example, this paper introduced the calculation methods of wind load of open house in United States MBMA86, including the wind load calculation of rigid frame, roof bars, roof panel and other different parts, in order to guide the domestic design personnel to better used the structure technical specification of portal rigid frame light house.%结合门式刚架轻型房屋钢结构特点，以具体项目为例，介绍了美国MBMA86中关于开敞式房屋风荷载的计算方法，包括刚架、屋面檩条、屋面板等不同部位的风荷载计算，以指导国内设计人员更好地使用门式刚架轻型房屋钢结构技术规程。
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