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1. Before lifting the air duct, it is necessary to ensure that the installation position and elevation of each bracket are correct and firm. Internal and external debris should be removed, and cleaning and protection work should be done well.

根據消防施工方案確定的吊裝方法（整體吊裝或分節吊裝，一般情況下風管的安裝多采用現場地面組裝，再分段吊裝的方法）,按照先干管后支管的安裝程序進行吊裝。

According to the fire protection construction plan, the lifting method is determined (overall lifting or segmented lifting, usually using on-site ground assembly and then segmented lifting for the installation of air ducts), and the lifting is carried out according to the installation procedure of starting with the main pipe and then the branch pipe.

吊裝可用滑輪、麻繩起吊，滑輪一般掛在梁、柱的節點上，或掛在屋架上。

Hoisting can be carried out using pulleys or hemp ropes, which are usually hung on nodes of beams and columns, or on roof trusses.

2. 據現場具體情況，掛好滑輪，穿上麻繩，風管綁扎牢固后即可開始起吊。

2. According to the specific situation on site, hang the pulley, put on the hemp rope, and tie the air duct firmly before starting the lifting.

當風管起吊距離地面200~300mm時，應當停止起吊，并檢查滑輪的受力點和所綁扎的麻繩、繩扣是否牢固，風管的是否正確。當檢查沒有問題后，方可繼續起吊至安裝高度，并把風管放在支、吊架上，再加以穩固后方可解開繩扣。

When the lifting distance of the air duct is 200-300mm from the ground, the lifting should be stopped and the force point of the pulley and the hemp rope and rope buckle tied should be checked for firmness, and the center of gravity of the air duct should be correct. After checking that there are no problems, continue to lift to the installation height, and place the air duct on the support and hanger, and then secure it before loosening the rope buckle.

3. 當水平管段吊裝就位后，應用托架的襯墊、吊架的吊桿螺栓找平，然后用拉線、水平尺和吊線的方法來哦檢查風管是否滿足水平和垂直的要求，符合要求后即可固定牢固，然后進行分支管或立管的安裝。

3. After the horizontal pipe section is lifted in place, the cushion of the bracket and the suspension rod bolts of the suspension bracket should be leveled, and then the air duct should be checked to see if it meets the horizontal and vertical requirements using methods such as pulling wires, leveling rods, and suspension wires. Once it meets the requirements, it can be fixed firmly, and then the branch or riser should be installed.