1. The galvanized spiral air duct shall be installed horizontally, with the diameter or long side size less than or equal to 400mm and the spacing not greater than 4m; More than 400mm, not more than 3m. The spacing between supports and hangers of galvanized spiral air duct can be extended to 5m and 3.75m respectively; For galvanized spiral air duct with thin steel plate flange, the spacing between supports and hangers shall not be greater than 3m.

2、镀锌螺旋风管支、吊架宜按国标图集与规范选用强度和刚度相适应的形式和规格。对于直径或边长大于2500mm 的超宽、超重等特殊镀锌螺旋风管的支、吊架应按设计规定。

2. The support and hanger of galvanized spiral air duct shall be in the form and specification appropriate to the strength and stiffness according to the national standard atlas and specifications. The supports and hangers of super wide, overweight and other special galvanized spiral air ducts with a diameter or side length greater than 2500 mm shall comply with the design requirements.

3、吊架的螺孔应采用机械加工。吊杆应平直，螺纹完整、光洁。安装后各副支、吊架的受力应均匀，无明显变形。镀锌螺旋风管或空调设备使用的可调隔振支、吊架的拉伸或压缩量应按设计的要求进行调整。

3. The screw hole of the hanger shall be machined. The suspender shall be straight, with complete and smooth threads. After installation, the stress of each auxiliary support and hanger shall be uniform without obvious deformation. The tension or compression of adjustable vibration isolation supports and hangers used for galvanized spiral air ducts or air conditioning equipment shall be adjusted according to the design requirements.

4、镀锌螺旋风管垂直安装，间距不应大于4m，单根直管少应有2 个固定点。

4. The galvanized spiral air duct shall be installed vertically, and the spacing shall not be greater than 4m. A single straight pipe shall have at least 2 fixing points.

5、支、吊架不宜设置在风口、阀门、检查门及自控机构处，离风口或插接管的距离不宜小于200mm。

5. The supports and hangers should not be set at the tuyere, valve, inspection door and automatic control mechanism, and the distance from the tuyere or plug pipe should not be less than 200mm.

6、当水平悬吊的主、干镀锌螺旋风管长度超过20m 时，应设置防止摆动的固定点，每个系统不应少于1 个。

6. When the length of the horizontally suspended main and dry galvanized spiral air duct exceeds 20m, a fixed point to prevent swing shall be set, and each system shall not be less than one.

7、镀锌螺旋风管垂直安装，间距不应大于4m，单根直管少应有2 个固定点。

7. The galvanized spiral air duct shall be installed vertically, and the spacing shall not be greater than 4m. A single straight pipe shall have at least 2 fixing points.

8、检查数量：按数量抽查10%，不得少于1 个系统。

8. Inspection quantity: spot check 10% of the quantity, not less than 1 system.

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