通风管道横担角钢的规范主要涉及风管的支吊架选用及安装要求，以下是具体的规范内容：

　　The specifications for cross arm angle steel of ventilation ducts mainly involve the selection and installation requirements of support and hanger brackets for air ducts. The following are the specific specifications:

　　一、横担角钢选用

　　1、 Selection of cross arm angle steel

　　水平安装风管的横担，可选用相应规格的角钢等型材。角钢的规格应根据风管的长边尺寸来确定。例如：

　　Horizontal installation of air ducts can use corresponding specifications of angle steel and other profiles. The specifications of angle steel should be determined based on the length of the air duct. For example:

　　当风管长边尺寸小于或等于630mm时，可选用较小规格的角钢，如L25×3。

　　When the length of the air duct is less than or equal to 630mm, smaller specifications of angle steel, such as L25 × 3, can be used.

　　当风管长边尺寸在630mm至1250mm之间时，可选用L30×3或更大规格的角钢。

　　When the length of the air duct is between 630mm and 1250mm, L30 × 3 or larger angle steel can be used.

　　当风管长边尺寸大于1250mm时，应选用更大规格的角钢，如L40×4或L50×5，以确保支吊架的承载能力。

　　When the length of the air duct is greater than 1250mm, larger specifications of angle steel, such as L40 × 4 or L50 × 5, should be used to ensure the bearing capacity of the support and hanger.

　　二、横担角钢安装要求

　　2、 Installation requirements for cross arm angle steel

　　支吊架间距：支吊架的间距应根据风管的规格和安装要求来确定。一般来说，对于不同规格的风管，支吊架的间距有所不同。例如，对于长边尺寸小于或等于2000mm的风管，支吊架的间距可以适当放大，但不应超过规定的最大值。具体间距可参考相关规范或设计要求。

　　Spacing between supports and hangers: The spacing between supports and hangers should be determined according to the specifications and installation requirements of the air duct. Generally speaking, the spacing between supports and hangers varies for different specifications of air ducts. For example, for ducts with a long side size of less than or equal to 2000mm, the spacing between supports and hangers can be appropriately increased, but should not exceed the specified maximum value. The specific spacing can refer to relevant specifications or design requirements.

　　支吊架加强：在弯管、三通、四通等连接处，以及风阀等部件与风管连接处，应适当加强支吊架，以确保风管的稳定性和安全性。

　　Strengthening of supports and hangers: At connections such as bends, tees, and tees, as well as at connections between components such as air valves and air ducts, supports and hangers should be appropriately strengthened to ensure the stability and safety of the air ducts.

　　支吊架设置：支吊架应设置在风管的重心处，并确保其牢固可靠。同时，支吊架与风管之间应垫上适当厚度的垫片，以防止风管在振动或温度变化时受损。

　　Support and hanger installation: The support and hanger should be installed at the center of gravity of the air duct and ensured to be firm and reliable. At the same time, a gasket of appropriate thickness should be placed between the support hanger and the air duct to prevent damage to the air duct during vibration or temperature changes.

　　风管固定：风管在安装过程中应保持水平或垂直，避免出现歪斜或扭曲现象。对于水平悬吊的主、干风管长度超过20m时，应设置防止摆动的固定点，以确保风管的稳定性。

　　Duct fixation: Ducts should be kept horizontal or vertical during installation to avoid tilting or twisting. When the length of the main and main air ducts suspended horizontally exceeds 20m, fixed points to prevent swinging should be set up to ensure the stability of the air ducts.

　　三、其他注意事项

　　3、 Other precautions

　　防腐处理：对于金属支吊架和角钢等附件，在潮湿或腐蚀性环境中应进行防腐处理，以延长其使用寿命。

　　Anti corrosion treatment: For metal supports, hangers, angle steel and other accessories, anti-corrosion treatment should be carried out in humid or corrosive environments to extend their service life.

　　安全检查：在安装完成后，应对支吊架和风管进行全面检查，确保其符合设计要求和安全规范。对于发现的问题应及时进行处理和整改。

　　Safety inspection: After installation, a comprehensive inspection should be conducted on the supports, hangers, and air ducts to ensure that they meet the design requirements and safety regulations. Any problems discovered should be promptly addressed and rectified.

　　综上所述，通风管道横担角钢的规范涉及多个方面，包括角钢的选用、安装要求以及其他注意事项等。在实际应用中，应严格按照相关规范和要求进行操作，以确保风管系统的稳定性和安全性。

　　In summary, the specifications for the cross arm angle steel of ventilation ducts involve multiple aspects, including the selection and installation requirements of angle steel, as well as other precautions. In practical applications, operations should be strictly carried out in accordance with relevant specifications and requirements to ensure the stability and safety of the air duct system.

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