通风管道抗震支架的安装距离一般为9米设置一个侧向抗震支架，18米设置一个纵向抗震支架。

　　The installation distance of seismic supports for ventilation ducts is generally 9 meters with a lateral seismic support and 18 meters with a longitudinal seismic support. 

　　对于直径大于或等于0.7米的通风管道系统，通常在9米处安装一个横向抗震支架，18米处安装一个纵向抗震支架。此外，对于非刚性材料如玻璃纤维、塑料等，其侧向抗震支架的距离可能减小到4.5米，纵向距离减小到9米。

　　For ventilation duct systems with a diameter greater than or equal to 0.7 meters, a transverse seismic support bracket is usually installed at 9 meters and a longitudinal seismic support bracket is installed at 18 meters. In addition, for non rigid materials such as fiberglass, plastic, etc., the distance between their lateral seismic supports may be reduced to 4.5 meters, and the longitudinal distance may be reduced to 9 meters.

　　抗震支架的类型包括水管单管、水管综合管（3-4管、5-6管）、风管、桥架和综合支吊架等。不同类型的抗震支架有不同的安装距离要求。例如，水管单管的规范侧向间距是12米，规范纵向间距是24米；风管的规范侧向间距是9米，规范纵向间距是18米；桥架的规范侧向间距是12米，规范纵向间距是24米。

　　The types of seismic supports include single pipe water pipes, comprehensive pipe water pipes (3-4 pipes, 5-6 pipes), air ducts, cable trays, and comprehensive support hangers. Different types of seismic supports have different installation distance requirements. For example, the standard lateral spacing for a single water pipe is 12 meters, and the standard longitudinal spacing is 24 meters; The standard lateral spacing for air ducts is 9 meters, and the standard longitudinal spacing is 18 meters; The standard lateral spacing for cable trays is 12 meters, and the standard longitudinal spacing is 24 meters.

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