Most modern sheetmetal fabrication shops use a mechanized piece of equipment to create the pittsbugh joint on one.
Pittsburgh joint sheet metal.
When making a grooved seam on a cylinder you fit the piece over a stake and lock it with the hand groover fig.
This increases productivity while keeping each seam consistently formed on multiple pieces of duct.
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The grooved seam joint fig.
In sheet metal shops a rollforming machine is used to fold the pittsburgh seam on one end of a piece of ductwork for example.
Built to the same construction specs and using the same frame as their heavy duty 16 ga pittsburgh machine the flagler 20 ga high speed pittsburgh runs the 5 16 pocket depth female pitts seam seen on right and the adjustable height 3 8 max height male pittsburgh flange shown running on left both at 100 ft per minute.
Gmc pittsburgh sheet metal lock former machines call 773 334 5000 to order this machine.
It is a very efficient machine to bend straight duct joints and fittings with tdc type and tdf type flange connectors.
It consists of two folded edges that are locked together with a hand groover fig.
Designed so one operator can quickly slide a piece of sheet metal into the machine and align the notches in an instant on the.
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2 57 is one of the most widely used methods for joining light and medium gauge sheet metal.
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A pittsburgh lock consists of three bends that form an extended s shape which creates an airtight seal after completion.
The button punch snap lock is used in the same way as the pittsburgh lock for joining comer sections of sheet metal.
Its big advantage is that no additional hammer over operation is required with a direct result of less labor cost in assembly.