Metal Used for the manufacture of bearings; material composed of various alloys of tin with antimony and copper. Friction and metal-to-metal contact is avoided by a film of lubricating oil on the surface and between the bearings.
Two or more items that are placed in mirror image to one another. When used with plumbing fixtures, where a common wall is shared, back-to-back installation saves both space and money. Since the water supply and the waste drain and pipe venting are shared, repeat installation is unnecessary.
Process of initially applying pain or stain with a roller or spray and then rubbed into the surface with a brush. Exterior stains are among those products that are best forced into the pores of the wood with a brush.
Backer Rod Foam
Also referred to as backup, it’s used in strips to partially fill any gaps before caulk is applied. Foam rope needs only a thin topping of caulk; Mortite, a semi-solid caulking strip and Oakum, a heavy, chemically saturated rope may also be used. These products are necessary since caulk cannot be applied thickly enough to fill deep gaps.
Rigid board used beneath tile, as the base layer for acoustical ceiling tile or as the first layer in a multiple-layer wall system. Base ply wall panels are used by keeping the long edges parallel to the wall studs, unless the wall height is more than 97 inches or you are using decorated wall panels. Face ply, second layer and base ply panels can’t fall in the same place, which would weaken the joint, so they are staggered. Base ceiling panels are fastened with the long edges perpendicular to the to the ceiling joints or framing. Face ply is installed over this with the long edges parallel to the ceiling joist and are fastened though the base ply panels into the joists.
Soil, stone or other material moved up against a foundation to solidify and support the foundation structure of a newly built house or replacing the excavated earth around and against the foundation. Compacted earth retains its shape so that water will flow away from the foundation wall. For that reason, backfill should be a blend of earth and stone and without materials that would deteriorate easily.
Plumbing device which prevents the backflow of water (reversing its flow and returning to the supply system) by using a check valve, which permits flow in only one direction by using a hinged flapper or guided poppet that opens when the flow is going in one direction but will close if the direction reverses. An air gap, which is a vertical distance between the outlet of the supply and the overflow rim of the fixture into which the water flows. Water, under pressure, can pass over an air gap but cannot return to the supply. Plumbing codes usually require that backflow preventers are installed between the water main and the branch connections to individual service.
1. Substance used behind a facing to add strength, stiffness or structural support.
2. Block wall serving as a base for brick wall by using an occasional header brick to tie the brick wall to the backing.
3. Supporting of the weld metal during welding by adding material to the back side of the root.
Material installed above or behind a kitchen countertop, which prevents splashing or spilling of water, or other substances down the wall. Tile, Corian, granite, and Formica are common materials used.
Stamp on plywood panels showing approval by the American Plywood Association. Also known as an edgemark, all unsanded or touch-sanded panels or panels with A or B faces on one side only have the APA trademark on the panel back.
1. A substitute or standby.
2. Structural portion behind a fa�ade.
3. Overflowing of a plumbing fixture due to stoppage.
4. Sturdy, stationary object against which material can be pushed by a piece of earth-moving equipment.