material installed to reduce or transfer the intensity of sound
annealing
process by which metal is heated to relieve stress, changing the metal’s strength and hardness
blank piece
piece of material cut to size prior to notching or marking
brake
manual or power equipment used to bend and form metal
breeching
the horizontal portion of a combustion venting system used for exhausting fumes and gases
building envelope
a barrier between the interior and exterior environment of the building that serves as an outer shell to protect the indoor environment from elements such as moisture
building insulation
material installed on buildings for comfort and energy efficiency
built-up system
a multi-section system that must be put together as per manufacturers’ specifications
burglar bars
heavy steel bars installed to prevent access
cladding
a material that covers another material to provide a skin or a layer; it is intended to control infiltration of weather elements or for aesthetic purposes
coping (architectural)
material used as the capping of a wall
crimper
power or manual tool used to allow round or square sheet metal pipes that are the same size to be corrugated to fit together
damper
valve or plate that stops or regulates the flow of air or materials
flashing
thin continuous piece of sheet metal or other impervious material installed to prevent the passage of water into a structure from an angle or joint
isolator
components that minimize noise, sound and vibration transfer
lagging
provides protection for the insulation from damage; it also creates a true, flat and even surface for aesthetic purposes
parallel line method
method of pattern development based upon lines at an equal distance at all points
radial line method
method of conical pattern development where all points radiate from a common apex
seam/lock
any process of connecting two pieces or two ends of metal together
shear
equipment or a process of cutting sheet metal
stake
equipment used in forming material by hand; usually found in a sheet metal shop
stretch-out
overall length of material, not including locks and seams
thermal insulation
material used to reduce the rate of heat transfer
triangulation development
method of pattern development using right angle triangles and two known points to find a third unknown point
