Ventilation installation Quantities Calculation (including cases)
[Introduction] Ventilation installation quantities calculation (including cases) doc format 8 pages of air duct quantities calculation and quota use: the quantities of air ducts made and installed with thin steel plate, galvanized steel plate, stainless steel plate, plastic plate and other plates shall be calculated in square meters according to the length of the center line of the air duct shown in the construction drawing, and the developed area of different section shapes (circle, square, rectangular) of the air duct. ① Developed area of air duct: the area of inspection hole, measuring hole, air supply outlet, air suction outlet, etc. is not deducted, and the overlap of seaming is not increased. ② Calculation of air duct length: the center line length shown in the construction drawing shall prevail. Including the length of elbows, tees, reducers, and pipe fittings in the round sky. The intersection point between the branch centerline and the main centerline is the dividing point for the branch pipe length. The length of air duct does not include the length occupied by components. ③ The quota of air duct fabrication and installation includes the fabrication and installation of elbows, tees, reducers, pipe fittings, flanges, reinforcing frames, hangers, brackets and supports. The air duct fabrication and installation quota does not include the fabrication and installation of the floor support of the spanning air duct. The cost shall be calculated separately by weight, and relevant sub items of ventilation and air conditioning sub volume shall be used.
