Board Foot - A unit of measure for lumber equal to 1 inch thick by 12 inches wide by 12 inches long. Examples -
Contractor - A company licensed to perform certain types of construction activities. In most states, the generals contractor's license and some specialty contractor's licenses don't require of compliance with bonding, workmen's compensation and similar regulations. Some of the specialty contractor licenses involve extensive training, testing and/or insurance requirements. There are various types of contractors:
Doorjamb, interior - The surrounding case into which and out of which a door closes and opens. It consists of two upright pieces, called side jambs, and a horizontal head jamb. These 3 jambs have the "door stop" installed on them.
Heat Rough - Work performed by the Heating Contractor after the stairs and interior walls are built. This includes installing all duct work and flue pipes. Sometimes, the furnace and fireplaces are installed at this stage of construction.
Jack rafter - A rafter that spans the distance from the wall plate to a hip, or from a valley to a ridge.
Rough opening - The horizontal and vertical measurement of a window or door opening before drywall or siding is installed.
Shingles, siding - Various kinds of shingles, used over sheathing for exterior wall covering of a structure.
Shingles - Roof covering of asphalt. asbestos, wood, tile, slate, or other material cut to stock lengths, widths, and thickness'.
Short circuit - A situation that occurs when hot and neutral wires come in contact with each other. Fuses and circuit breakers protect against fire that could result from a short.
Siding, (lap siding) - Slightly wedge -shaped boards used as horizontal siding in a lapped pattern over the exterior sheathing. Varies in butt thickness from « to _ inch and in widths up to 12".
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Precision Twist 27/64"Taper Length Drill Parabolic 135 Deg HSS S/P L 7 1/4" Flute 4 5/8"
Editorial Reviews — ... Product Description | Precision Twist Drill Parabolic flute drill bits, these have a large flute space for greater chip flow and improved coolant flow to the drill bit point. These factors allow bits to drill deeper and produce closer hole tolerances more quickly than regular jobbers bits. A large cross section increases rigidity and strength. Bits have a reduced margin width to lessen contact between the bit and the hole sides to minimize friction and heat. A self centering 135 degree split point penetrates...more
Precision Twist QC0860P High Speed Steel Extra-Long Length Drill Bit, Uncoated (Bright) Finish, Round Shank, Parabolic Flute, 135 Degree Point Angle, 27/64"
Feature: ... High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance; Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications; Round shanks allow use with a wide variety of toolholding systems; Parabolic flute drill bits have larger flutes than regular drill bits, for improved chip removal when drilling metals with large chips such as aluminum or titanium; Right-hand cut tools have a cutting action that engages when they are run in a clockwise direction ...more
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