The invention relates to the technical field of constructional
engineering, in particular to a horizontal air duct mounting method which comprises the steps that a connecting lead screw is machined, and an L-shaped special hanging piece is prefabricated; the connecting lead screw is fixedly connected to the lower portion of the building structure body; an L-shaped special hanging piece is fixed to the connecting lead screw; splicing to form an air
pipe section hoisting unit; the air
pipe section hoisting units are fixed to the L-shaped special hanging pieces; the remaining air
pipe section hoisting units are correspondingly fixed to the L-shaped special hanging pieces, and all the air pipe section hoisting units are connected together to form a horizontal air pipe; after an air pipe
surface heat preservation layer / fireproof layer is formed on the outer surface of the horizontal air pipe, a
flange surface heat preservation layer / fireproof layer is formed on the outer surface of the air pipe
flange; by means of the installation method, the installation efficiency of the horizontal air pipe can be improved, the use amount of sectional materials for air pipe installation is reduced, the construction difficulty of a heat preservation or
fire prevention method is reduced, meanwhile, the height of the space occupied by air pipe
system installation is reduced, and the clearance below the air pipe is improved.