The coating surface of the hot-dip galvanized tray of the air insulated bridge shall be uniform, free of defects such as burr, overburning, ash hanging, scar, local galvanizing, etc., and shall not have zinc nodules that affect the installation, and the coating of the thread shall be smooth; Bolted connections shall be screwed in. The painted bridge shall be flat, smooth, uniform, without peeling and bubbles. The weld surface of the bridge shall be uniform, and there shall be no defects such as missed welding, crack, slag inclusion, burnthrough, crater, etc.

各類(lèi)彎通及附件規格，應適合工程布置條件，并與托盤(pán)、梯架配套；支吊架規格選擇，應按托盤(pán)、梯架規格配置，并應滿(mǎn)足荷載的要求。根據施工圖確定始端到終端位置，沿圖紙標定走向，找好水平、垂直、彎通，用粉線(xiàn)袋或畫(huà)線(xiàn)沿橋架走向在墻壁、頂棚、地面、梁、板、柱等處彈線(xiàn)或畫(huà)線(xiàn)，并均勻檔距畫(huà)出支、吊、托架位置。

The specifications of various bends and accessories shall be suitable for the engineering layout conditions and shall be matched with the tray and ladder; The specifications of supports and hangers shall be selected according to the specifications of trays and ladders, and shall meet the load requirements. Determine the position from the beginning to the end according to the construction drawing, mark the direction along the drawing, find out the horizontal, vertical, and bending, use chalk bags or draw lines along the bridge direction to snap or draw lines on the wall, ceiling, floor, beam, plate, column, etc., and draw the positions of supports, hangers, and brackets evenly.

1.空氣絕緣橋架支吊架安裝支架與吊架所用鋼材應平直，無(wú)顯著(zhù)扭曲。下料后長(cháng)短偏差應在3mm范圍內，切口處應無(wú)卷邊、毛刺。

1. The steel used for the installation of supports and hangers of air insulated bridge shall be flat and straight without significant distortion. The length deviation after blanking shall be within 3mm, and the notch shall be free of curling and burr.

2.空氣絕緣橋架鋼支架與吊架應焊接牢固，無(wú)顯著(zhù)變形，焊接前厚度超過(guò)4mm的支架、鐵件應打坡口，焊縫均勻平整，焊縫長(cháng)度應符合要求，不得出現裂紋、咬邊、氣孔凹陷、漏焊等缺陷。

2. The steel support and hanger of the air insulated bridge shall be welded firmly without significant deformation. The support and iron parts with a thickness of more than 4mm shall be beveled before welding. The weld shall be uniform and flat. The length of the weld shall meet the requirements, and there shall be no cracks, undercuts, air holes, dents, missed welding and other defects.

3.空氣絕緣橋架根據支架承受的荷重，選擇相應的膨脹螺栓及鉆頭；所選鉆頭長(cháng)度應大于膨脹套管的長(cháng)度，打孔的深度應以將套管全部埋入墻內或頂板內后為標準，表面平齊為宜。應先干凈打好的孔洞內的碎屑，然后再用木錘將膨脹螺栓敲進(jìn)洞內，應保證套管與建筑物表面平齊，螺栓端部外露，敲擊時(shí)不得損傷螺栓的絲扣。埋好螺栓后，用螺母配上相應的墊圈將支架或吊架直接固定在金屬膨脹螺栓上。

3. The air insulated bridge shall select the corresponding expansion bolts and drill bits according to the load borne by the support; The length of the selected drill bit should be greater than the length of the expansion casing, and the depth of the hole should be based on the standard after the casing is completely buried in the wall or roof, and the surface should be flush. The debris in the hole shall be cleaned first, and then the expansion bolt shall be knocked into the hole with a wooden hammer. The casing shall be flush with the building surface, and the bolt end shall be exposed. The screw thread of the bolt shall not be damaged when knocking. After embedding the bolts, use nuts and corresponding washers to fix the bracket or hanger directly on the metal expansion bolts.