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CONSTRUCTION
MATERIAL SPECIFICATION
FABRICATION
JOB REFERENCE
APPENDICES
APPENDIX A.
APPENDIX B.
TEST REPORT ON RECTANGULAR AIR DUCT CROSS JOINT C/W ROLLFORMED
SHEET STIFFENER FOR J2, J3, J4, J5 & J6
TEST REPORT ON RECTANGULAR AIR DUCT CROSS JOINT C/W STEEL ANGLE
STIFFENER FOR J2, J3, J4, J5 & J6
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3
4
5
7
23
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Clamp
Alternative sealant locations
DuctFlange Profile
Gasket
-120
-130
-140
Flange Corner J2 J3 J4 J5 J6-20
-30
-40
S3/4 S5Rating
Provides for rapid assembly of cross jointsAvailable in standard
metric sizes of 20mm,30mm and 40 mm
Fully conforms to specification DW/144Choice for material types
and gauges to suitspecifications and requirements
Tested and certified by Ir HN Lam of the University of Hong Kong
in accordance with the HVAC test procedures DW/TM1
Suitable for Joints & Stiffeners Rating up to J6/S6 and
pressure classes A, B and C
Full range of accessories to suit all sizes of flanges
-130S
-140S
-30
-40
-120S -20
S2 S6
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-120/120S
-130/130S
-140/140S
-20 2.5 0.05 -30 2.8 0.125 -40 3.5 0.2
-120/120S 100m -130/130S 100m -140/140S 50m
-20 in boxes of 150 -30 in boxes of 150 -40 in boxes of 100
LMLM
LM
"Am Tape" gasket tape is an excellent air-tight gasket for use
in air-duct systems. It is made of fire-retarded nitril rubber
foam. With its 100% closed cell, elastic and highly flexible
properties. Service
O Otemperature range -40 C to +85 C. We recommend the use of the
appropriate gasket to ensure performance in accordance with DW/TM1
test results.
-20
-30
-40
-120 0.7 0.475/m -130 0.8 0.73/m -140 1.0 1.12/m
-130S 1.0 0.94/m -140S 1.2 1.32/m
-120S 0.8 0.54/m
LM
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DUCT
DUCTNose (facing away from Duct)
Duct
Spot weld,rivet or clinch
Duct
applied this area
Inside of Duct
Directionof Cut
Cut two lengths of profile to suit the duct width less 28
(W),and two lengths to suit the duct height less 28 (H). Note:
outside dimensions of the duct are to be used, not internal.
For best results use a circular cut off saw with pneumatic vice.
If any burring has occurred during the cutting of the flange, this
must be removed before assembly.
Insert four corners into the flange form a rectangle frame as
shown. Care must be taken to ensure the legs of the corners are
fully inserted into the flange, the 'nose' on the corner faces away
from the duct on which the frame is to be fitted. To comply with
DW/144 corner pieces should be fixed into the flange. This can be
done with a press tool.the cutting of the flange, this must be
removed before assembly.
The frame is now ready to be fitted to the duct. Starting in one
corner, the frame should be firmly tapped home by working away from
this corner. On larger ducts a straight edge can be used to ensure
the frame is on 'flat'.
The frame can be attached to the duct by various methods, spot
welding ,rivet or clinch. Spacing for fastenings to be as DW/144
table 5. A fixing at a maximum of 50 mm from each comer is
recommended, this will give additional strength during the
installation.
Any burrs caused during the drilling for fixings should be
removed from all surfaces before finally fixing the frame to the
duct. Sealant should be applied if any method of fixing pierces the
duct..
When the frame is securely fixed, a fillet of mastic needs to be
run along the cut end of the flange on the inside of the duct.
Sealant must be
w H
Building E-F, Tiantou Industrial Area, Pingshan Street,
PingshanNew District, Shenzhen City, Guandong Province,
P.R.China.TEL: (86-755) 8993 7642 (852) 8302 4988FAX: (86-755) 8993
7775 (86-755) 8993 7286E-MAIL: [email protected]:
www.luenming.com
Flat 9, 7/F, Ricky Centre, 36 Chong Yip Street, Kwun Tong,
Kowloon, HongKong.TEL: (852) 2797 2168FAX: (852) 2790 1254E-MAIL:
[email protected]: www.luenming.com
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Building E-F, Tiantou Industrial Area, Pingshan Street,
PingshanNew District, Shenzhen City, Guandong Province,
P.R.China.TEL: (86-755) 8993 7642 (852) 8302 4988FAX: (86-755) 8993
7775 (86-755) 8993 7286E-MAIL: [email protected]:
www.luenming.com
Flat 9, 7/F, Ricky Centre, 36 Chong Yip Street, Kwun Tong,
Kowloon, HongKong.TEL: (852) 2797 2168FAX: (852) 2790 1254E-MAIL:
[email protected]: www.luenming.com
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TEST REPORT ON RECTANGULAR AIR DUCT CROSS JOINT
C/W
ROLLFORMED SHEET METAL STIFFENER
FOR
J2, J3, J4, J5 & J6
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APPENDIX B
TEST REPORT ON RECTANGULAR AIR DUCT CROSS JOINT
C/W
STEEL ANGLE STIFFENER
FOR
J2, J3, J4, J5 & J6
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