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　　通風管道橫擔角鋼的規范主要涉及風管的支吊架選用及安裝要求，以下是具體的規范內容：

　　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、橫擔角鋼選用

　　1、 Selection of cross arm angle steel

　　水平安裝風管的橫擔，可選用相應規格的角鋼等型材。角鋼的規格應根據風管的長邊尺寸來確定。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:

　　當風管長邊尺寸小于或等于630mm時，可選用較小規格的角鋼，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.

　　當風管長邊尺寸在630mm至1250mm之間時，可選用L30×3或更大規格的角鋼。

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

　　當風管長邊尺寸大于1250mm時，應選用更大規格的角鋼，如L40×4或L50×5，以確保支吊架的承載能力。

　　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、橫擔角鋼安裝要求

　　2、 Installation requirements for cross arm angle steel

　　支吊架間距：支吊架的間距應根據風管的規格和安裝要求來確定。一般來說，對于不同規格的風管，支吊架的間距有所不同。例如，對于長邊尺寸小于或等于2000mm的風管，支吊架的間距可以適當放大，但不應超過規定的最大值。具體間距可參考相關規范或設計要求。

　　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.

　　支吊架加強：在彎管、三通、四通等連接處，以及風閥等部件與風管連接處，應適當加強支吊架，以確保風管的穩定性和安全性。

　　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.

　　支吊架設置：支吊架應設置在風管的重心處，并確保其牢固可靠。同時，支吊架與風管之間應墊上適當厚度的墊片，以防止風管在振動或溫度變化時受損。

　　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.

　　風管固定：風管在安裝過程中應保持水平或垂直，避免出現歪斜或扭曲現象。對于水平懸吊的主、干風管長度超過20m時，應設置防止擺動的固定點，以確保風管的穩定性。

　　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、其他注意事項

　　3、 Other precautions

　　防腐處理：對于金屬支吊架和角鋼等附件，在潮濕或腐蝕性環境中應進行防腐處理，以延長其使用壽命。

　　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.

　　安全檢查：在安裝完成后，應對支吊架和風管進行全面檢查，確保其符合設計要求和安全規范。對于發現的問題應及時進行處理和整改。

　　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.

　　綜上所述，通風管道橫擔角鋼的規范涉及多個方面，包括角鋼的選用、安裝要求以及其他注意事項等。在實際應用中，應嚴格按照相關規范和要求進行操作，以確保風管系統的穩定性和安全性。

　　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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