MS for ductwork system

Saigon M&C Tower Project Method Statement For Ductworks General Aim Scope of works Methodology I Duct Installation Works Air Duct Connection Air Duct Seal Air Duct Insulation II Air Devices Installation Works Volume Dampers (VD), Volume Control Dampers (VCD), Fire Dampers (FD) Diffuser, Grille Plenum Chamber, Silencer Chamber Flexible Duct, Canvas Joints Louver, Access Door, Outdooor Hood A 12/03/09 C.T.P N.A.K L.Q.K J.R.P FIRST ISSUE Page Saigon M&C Tower Project Method Statement For Ductworks 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 Largest Dimension (mm) Duct Size (L max) Up to 400 Steel Sheet Thickness 0.5 600 800 ~ 1250 1600 ~ 2500 Above 2500 0.8 1.0 1.2 0.6 Air Duct Connection: Table 2: Regulation for air duct connection Schedule Corner Angle Duct Connection Companion Angle Duct C , TDC NA TDC NA NA Flange-40x40x3.0mm NA Flange-40x40x4.0mm Less than 600 (mm) Duct size 601 to 1500 (mm) largest dimension 1501 to 2500 (mm) (mm) Over 2500 (mm) Maximum Spacing (mm) 1100 1200 Size of Bolt & Nut (mm) mm mm Diameter (mm) 3.2 mm 3.2 mm Maximum Spacing on Center (mm) 65 mm 65 mm Rivet Page Saigon M&C Tower Project Method Statement For Ductworks Table 3: Support, hanger, spacing schedule Less than Duct size Hanger Vertical support 400 400 ~ 999 1000 ~1999 2000 ~ 2500 Over 2500 V- U- 50x50x3.5 80x38x3.5 x Φ10 x Φ10 x Φ12 3000 2500 2500 2500 V30x30x2.5 V-40x40x3 V- U- 50x50x3.5 80x38x3.5 Angle steel V-30x30x2.5 V30x30x2.5 V-40x40x3 Round bar x Φ8 x Φ10 Max pitch L 3000 Angle steel V-30x30x2.5 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: Concrete slab Anchor bolt Hanger rod M10 Air flow Air flow Air Duct W Angle steel (see table 3) L ≤ 1200 Detail A Figure 01: Typical duct connection detail (using flange joint) ) Detail A show be as Figure 02, Figure 03: 100 100 100 Angle steel flange (see table 02) Sealed Bolt hole 8mm Figure 02: Detail of bolt spacing for flange joint Page Saigon M&C Tower Project Method Statement For Ductworks 5mm thk Washer Rubber gasket Width: 25mm, 5mm thk Bolt & Nut 8mm Rivet 3.2mm Air Duct Angle steel flange (see table 02) Figure 03: Detail of connection angle for flange 1.2 Duct size under 1500mm: ) For duct size largest dimension under 1500mm show be as Figure 04 Air flow Air flow Main duct Change between section Detail B L W Branch duct L = 0.25W; L≥150mm Air flow Figure 4: Branch duct connection detail (using Transverse Duct Connector (TDC) joint) ) Detail B show be as Figure 05, Figure 06, Figure 07 Cross aim brace C B C A hole Φ10 A C B C Air duct A ≤ 150 mm B ≤ 200 mm 100 mm ≤ C ≤ 150 mm Figure 05: Detail of Cross Aim Brace Spacing Page Saigon M&C Tower Project Method Statement For Ductworks Cross Aim Brace (see table 4) Rubber gasket (see figure 08) TDC Corner (see table 4) Air Duct Figure 06: Cross Aim Brace detail Table 4: Size, Thickness and Spacing of TDC Joint Schedule Duct Size largest dimension (mm) Less than 700 700~1200 1200~1500 Size of TDC Duct End (minimum) (mm) 30 30 30 Thickness of TDC Corner (minimum) (mm) 1.2 1.2 1.2 1.0 1.0 1.0 1100 1100 1100 Thickness of Cross Arm Brace (minimum)(mm) Maximum Spacing (mm) TDC joint Corner plate (see detail) Air duct Max 1100 TDC flange Bolt M10 TDC corner 1.2mm thk TDC duct end (see table 4) Nut M10 Rubber gasket (see figure 08) Nut M10 Bolt M10 Rubber gasket (see figure 08) Figure 07: Typical TDC assembly detail Page Saigon M&C Tower Project Method Statement For Ductworks Rubber gasket Width: 25mm Thickness: 5mm 15-20mm Bolt hole 8mm Figure 08: Typical rubber gasket installation detail ) Note: ? Support, hanger will be concerned on method statement of M&E Support System Installation Work: ME - REE - T+ - MS – G+ - GEN - 003 Air Duct Seal: Bolt hole 10mm TDC joint Seal Air Duct 50 Figure 09: Position of Seal for TDC Joint Seal Angle flange joint Bolt hole 8mm 50 Air Duct Figure 10: Possition of Seal for Angle Flange Joint Page Saigon M&C Tower Project Method Statement For Ductworks Seal (Inside Only) Seal Air Duct Figure 11: Possition of Sealant for Duct Seam Air Duct Insulation: Table 5: Duct Insulation Specification Schedule Applicable scope Supply air duct Return air duct Smoke exhaust duct Material Type Density Thickness Glasswool Blanket 48kg/m3 25mm 48kg/m3 25mm Rockwool Board 60kg/m3 50mm Glasswool Blanket 48kg/m3 50mm Supply air chambers and sound attenuation fittings Attached Alu Tape (Width 50mm) Board insulation 50mm (see table 5) Seam Pin Φ1.6mm (see figure 15) Alu Sheet Cladding (if any) Air duct Metal clips Adhesive Figure 12: Typical smoke exhause duct insulation detail Page Saigon M&C Tower Project Method Statement For Ductworks Alu foil facing Metal clip Air du Alu sheet cladding (Non-flammable) ct Glasswool for AC duct Rockwool for smoke exhaust duct Pin Φ1.6mm (see figure 15) Figure 13: Ducting insulation layer detail Glasswool 25mm thk Glass cloth Metal clips Air duct Pins Φ1.6mm (see figure 14) ` Figure 14: Insulation detail for supply air chambers and sound attenuation fitings Page Saigon M&C Tower Project Method Statement For Ductworks Max 300mm Max 300mm Pin Φ1.6mm Metal clip Insulated duct Bare duct Max 300mm Max 300mm Figure 15: Shape & distance of pins Page 10 Saigon M&C Tower Project Method Statement For Ductworks Front view Pin Φ 1.6mm 50mm 25mm Flange joint Metal slip Glasswool 25mm thk 50mm 25mm Attached alu tape 25mm Glasswool 25mm thk TDC joint Alu Tape 50mm TDC or Flange joint 25mm Attached alu tape 25mm 50mm Plan view Figure 16: Typical insulation menthod for TDC joint & flange joint Glasswool 25mm thk (inside diffuser box) Glasswool 25mm thk (outside duct) Chamber box Air flow Screw Glasswool 25mm thk (outside duct) Aluminum tape 25mm Ceiling Figure 17: Detail of typical insulation for diffuser box Metal slip Page 11 Attached alu tape 25mm Saigon M&C Tower Project Method Statement For Ductworks Wall Screw Air duct Frame Glasswool 25mm thk (outside duct) Tapping Figure 18: Detail of typical insulation for grille (VHS type) II Air Devices Installation Works: Volume Dampers (VD), Volume Control Dampers (VCD), Fire Damer (FD): TDC joint VD Air flow D Air duct L VD L = 8D D: diameter of air duct Air Fan Concrete slab Concrete foundation Figure 19: Detail of setting damper Table 6: Quantity of hanger rods for Fire Damper Rectangular Duct Spiral Duct Duct size or Diameter (mm) Less than 300 Over 300 Less than 300 Over 300 Quantity of hanger rods (nos) 4 Page 12 Saigon M&C Tower Project Method Statement For Ductworks Branch duct Access door FD Concrete floor slab Fire damper Wall Anchor bolt Angle steel Bolt M8 Rubber pad Vertical duct Insulation 25mm PLAN VIEW Anchor bolt Wall Rockwool 50mm Concrete floor slab V-Angle steel Bolt M8 Hanger rod Fire damper Insulation 25mm Vertical duct VCD Access door FD Duct elbow V-Angle steel FRONT VIEW Figure 20: Typical damper installation detail Page 13 Saigon M&C Tower Project Method Statement For Ductworks Diffusers, Registers: Connection with Duct Connection with chamber box H＋50mm D H＋50mm Flexible 100mm or over W＋50mm Flexible Chamber box D D＋50mm K Ceiling Air duct K Ceiling W×H K = 150 ~ 300mm W×H H, W: Dimension of Diffusers opening size for ceiling (mm) d : Diameter of flexible duct (mm) Figure 21: Example of connection with chamber & duct SUPPLY AIR CHAMBER BOX Insulation (inside) Glasswool 25mm thk Insulation (outside) Glass wool 25mm thk Opposed blade damper (if any) Insulation (outside) Glass wool 25mm thk Ceiling Figure 22: Detail of typical installation for supply air diffuser Page 14 Saigon M&C Tower Project Method Statement For Ductworks Insulation (inside) Glasswool 25mm thk RETURN AIR CHAMBER BOX Insulation (outside) Glass wool 25mm thk Screw Ceiling Figure 23: Detail of typical installation for return air grille EXHAUST AIR CHAMBER BOX Opposed blade damber (if any) Screw Ceiling Figure 24: Detail of typical connection for exhause air grille Plenum Chamber, Silencer Chamber: ? Sound Absorber for Chamber shall be used glasswool 50mm thk, 48 kg/cm3 density Table 7: Galvanized steel sheet thickness for Chamber Longest Dimension of Chamber (mm) Chamber Size (L max) (mm) Less than 800 800 ~ 1500 1500 or Over Steel Sheet Thickness (mm) 0.8 1.0 1.2 Page 15 Saigon M&C Tower Project Method Statement For Ductworks A Sound Absorber by glasswool 50mm thk Silencer Elbow R A L Figure 25: Silencer Elbow Chamber Detail Sound Absorber by glasswool 50mm thk B Silencer Chamber Detail D Detail E A Figure 26: Silencer Chamber Detail Detail E GI sheet cover 0.6mm thk 25~50mm Air Duct Pin Φ 1.6mm Sound Absorber by glasswool 50mm thk Page 16 Saigon M&C Tower Project Method Statement For Ductworks Detail D Sound Absorber by glasswool 50mm thk Pin Φ1.6mm 25~50mm 75mm 100~150mm Figure 27: Chamber Jointing Detail Flexible Duct, Canvas Joints a) Flexible Duct: Insulation (inside) Glasswool 25mm thk Steel band G.I.sheet 0.6mm thk Bolt M6 FLEXIBLE DUCT AIR DUCT SUPPLY AIR CHAMBER BOX Steel band G.I.sheet 0.6mm thk Insulation (outside) Glasswool 25mm thk Screw 3.2Ø Opposed blade damper (if any) Insulation (outside) Glass wool 50mm thk Ceiling Figure 28: Detail of typical connection between flexible duct & chamber box Page 17 Saigon M&C Tower Project Method Statement For Ductworks b) Canvas Joints: Duct canvas Detail F Air duct Air duct L Flange joint L = 200 ~ 250 (mm) Figure 29: Canvas Joint Detail Detail F Rubber gasket (width:5mm) Angle steel flange Washer Bolt and nut M8 Rivet 3.2mm Air duct Canvas Joint Cuff 5mm or more Galvanized steel sheet ( same as duct thickness) Insulation (inside) Glasswool 25mm thk RETURN CHAMBER BOX Insulation (outside) Glasswool 25mm thk AIR DUCT Screw Flange joint (refer to detail G) Canvas Ceiling Figure 30: Detail of typical connection between canvas & chamber box Page 18 Saigon M&C Tower Project Method Statement For Ductworks Louver, Access door, Outdoor Hood: a) Louver: Concrete slab Wall Anchor bolt Mortar Grout Louver Hanger rod Chamber box 500mm Anchor bolt Access door (see figure 32) Figure 31: Typical Louver Installation Detail Page 19 Angle steel (see table 3) Saigon M&C Tower Project Method Statement For Ductworks b) Access door: Steel plate Screw 3.2Ø Air duct Sach lock Aluminium Aluminium Steel plate Sach lock Figure 32: Typical Access Door Installation Detail c) Outdoor Hood: Mortar Wall Sealant Rockwool 60kg/m3 Outdoor hood Screw Air duct Insect Screen (if any) Chamber box GI sheet cover 0.6 mm thk Figure 33: Typical Outdoor Hood Installation Detail Page 20 ...Saigon M&C Tower Project Method Statement For Ductworks General: Items: - The Method Statement for Air Distribution Installation Works Aim: The aim of works is to describe... 10: Possition of Seal for Angle Flange Joint Page Saigon M&C Tower Project Method Statement For Ductworks Seal (Inside Only) Seal Air Duct Figure 11: Possition of Sealant for Duct Seam Air Duct... Saigon M&C Tower Project Method Statement For Ductworks Alu foil facing Metal clip Air du Alu sheet cladding (Non-flammable) ct Glasswool for AC duct Rockwool for smoke exhaust duct Pin Φ1.6mm (see