Definition of the term Redline, Red Lined Prints
Blueprints that reflect changes and that are marked with red pencil.
Definition of the term Transmitter (Garage Door)
The small push-button device that causes the garage door to open or close.
Definition of the term Class "B" Fire Resistance
Fire-resistance rating that indicates roofing material is able to withstand moderate exposure to fire originating from sources outside the building.
Definition of the term Feathering Strips
Tapered wood filler strips placed along the butt edges of old wood shingles to create a level surface when re-roofing over existing wood shingle roofs. Also called "horsefeathers."
Definition of the term Limit Switch
A safety control that automatically shuts off a furnace if it gets too hot. Most also control blower cycles.
Definition of the term Reducer
See bushing.
Definition of the term Trap
A plumbing fitting that holds water to prevent air, gas, and vermin from backing up into a fixture.
Definition of the term Class "C" Fire Resistance
Fire-resistance rating that indicates roofing material is able to withstand light exposure to fire originating from sources outside the building.
Definition of the term Felt
A very general term used to describe composition of roofing ply sheets, consisting of a mat of organic or inorganic fibers either unsaturated, impregnated with asphalt or coal tar pitch,…
Definition of the term Lineal Foot
A unit of measure for lumber equal to 1 inch thick by 12 inches wide by 12 inches long. Examples