Joints And Seams (110103d) Flashcards
What is fastener pitch?
This is the even spacing between the fasteners
What allowance should an outside lap have?
1/8
What is the most common joint in the sheet metal trade?
Lap and offset lap
Where should fasteners be started?
In the middle working out
What is another name for pop rivets?
Blind rivets
How much of the rivet shank should be protruding out before being upset?
1 1/2 times the diameter of the rivet
What is the minimum allowance that can be run on a Pittsburgh machine?
15/16
Where is button lock used?
Light pressure and lower pressure duct
Residential
What is spot welding also known as?
Resistance welding
Where is the dove tail seam most commonly formed?
In the field
How many brakes on a regular hammer lock?
3
What is edge distance?
The distance between edge of material and centerline of fastener that will be used to secure the seam.
