Saigon M&C Tower Project Method Statement For Ductworks Page 2 General Aim Scope of works Methodology I. Duct Installation Works 1. Air Duct Connection 2. Air Duct Seal 3. Air Duct Insulation II. Air Devices Installation Works 1. Volume Dampers (VD), Volume Control Dampers (VCD), Fire Dampers (FD). 2. Diffuser, Grille 3. Plenum Chamber, Silencer Chamber 4. Flexible Duct, Canvas Joints 5. Louver, Access Door, Outdooor Hood A 12/03/09 FIRST ISSUE C.T.P J.R.P L.Q.K N.A.K
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Saigon M&C Tower Project Method Statement For Ductworks
Page 2
General Aim Scope of works Methodology
I. Duct Installation Works 1. Air Duct Connection
2. Air Duct Seal
3. Air Duct Insulation
II. Air Devices Installation Works 1. Volume Dampers (VD), Volume Control Dampers (VCD), Fire Dampers (FD).
2. Diffuser, Grille
3. Plenum Chamber, Silencer Chamber
4. Flexible Duct, Canvas Joints
5. Louver, Access Door, Outdooor Hood
A 12/03/09 FIRST ISSUE C.T.P J.R.P L.Q.K N.A.K
Saigon M&C Tower Project Method Statement For Ductworks
Page 3
General:
Items: - The Method Statement for Air Distribution Installation Works.
Aim: The aim of works is to describe mechanical works associated with installation of Air
Distribution Installation Works and to ensure compliance with contract requirements,
specification and quality control.
Scope of Works: The scope of work for this method statement shall include all the Ductworks for the
SAIGON M&C TOWER Project.
Methodology:
I. Duct Installation Works: Table1: Rectangular Duct Thickness Schedule
1. Air Duct Connection: Table 2: Regulation for air duct connection Schedule
Corner Angle Duct Connection Companion Angle Duct
Less than 600 (mm) C , TDC NA
601 to 1500 (mm) TDC NA
1501 to 2500 (mm) NA Flange-40x40x3.0mm
Duct size largest
dimension (mm)
Over 2500 (mm) NA Flange-40x40x4.0mm
Maximum Spacing (mm) 1100 1200
Size of Bolt & Nut (mm) 8 mm 8 mm
Diameter (mm) 3.2 mm 3.2 mm Rivet Maximum Spacing on
Center (mm) 65 mm 65 mm
Largest Dimension (mm)
Duct Size (L max) Up to 400 600 800 ~ 1250 1600 ~ 2500 Above 2500
Steel Sheet Thickness 0.5 0.6 0.8 1.0 1.2
Saigon M&C Tower Project Method Statement For Ductworks
Page 4
Table 3: Support, hanger, spacing schedule
Duct size Less than
400 400 ~ 999 1000 ~1999
2000 ~
2500 Over 2500
Angle steel V-30x30x2.5 V30x30x2.5 V-40x40x3 V-
50x50x3.5
U-
80x38x3.5
Round bar 2 x Φ8 2 x Φ10 2 x Φ10 2 x Φ10 2 x Φ12 Hanger
Max. pitch L 3000 3000 2500 2500 2500
Angle steel V-30x30x2.5 V30x30x2.5 V-40x40x3 V-
50x50x3.5
U-
80x38x3.5 Vertical
support Max. pitch L One point for each floor
1.1 Duct size over 1500mm:
For duct size largest dimension over 1500mm show be as Figure 01: