Use your leg a workbench or the ground to support the back side of the pipe.
How to make sheet metal duct fittings.
Assemble the metal ducting like a zipper when assembling pipe start at one end and work the seam together like a zipper.
Position it about 10 inches to 12 inches from.
This video is for my cfm 320 mechanical systems class.
Identify the procedures associated with joining and installing sheet metal duct.
In 1986 i use to work at the sheet metal shop where we made all the ducts and fittings almost exclusively by hands.
Lay the steel ruler on the metal parallel to the edge of the long side.
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Insert a 1 2 inch long self tapping sheet metal screw at the location where the two ducts overlap to provide a solid connection.
Identify the different types of sheet metal duct systems.
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Place a 4 foot by 8 foot piece of sheet metal on the work table.
State the safety regulations associated with sheet metal and fiberglass duct.
Nevertheless we were able to make all kinds of rectangular and round ducts and all types of fittings.
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Layout manual for sheet metal duct fitting for the hvac sheet metal industry.
It explains the process of making a duct fitting from a raw piece of 24 gauge sheet metal.
Describe procedures utilized in sheet metal development.
The three screws will prevent the two ducts from moving and separating at the new seam.
How to make hvac ducts.
Flex duct elbow 714 damper 090a angle round to oval boot 012 oval stackhead round duct 710r 90 angle register boot 708r straight register boot 701 offset collar 776 scotty 265 floor inlet 809 regular stackhead 720 wall stack 701 stack side take off 816 1 2 joist panning 726 transition 729 flat elbow 809 stackhead 799 end cap 750r center end.
Yes we had a hydraulic guillotine shear sheet metal brakes slip roll machine hand tools and this about it.
The width of the sheet 4 feet will be the length of the duct when you.
Use one hand to keep the two edges close and the other to apply downward pressure.