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Term Definition
Recreational Use Statutes. Laws that have been adopted in most states to protect property owners from liability to persons who are permitted to use the property for recreational purposes.  
Rectangle. A four sided plane figure whose angles are equal; a parallelogram.  
Rectifier. A device for converting alternating current to direct current.  
Rectilinear. Characterized by straight lines; perpendicular.  
Red Cedar Shake and Shingle Bureau (RCSSB). 515 116th Avenue NE, Suite 275, Bellevue, Washington 98004, (206) 543-1323, Fax (206) 455-1314.  
Red Fir. Douglas Fir.  
Red Label Goods. Flammable or explosive materials with flash points below 80° F. (26.7° C.).  
Red Lead. A compound formed by roasting lead or litharge; it used extensively in paints for protecting iron and steel against corrosion.  
Red Ochre. An earthy pigment made from impure iron ore, used in paint.  
Redan. A part of a medieval fortification consisting of two walls or parapets projecting at an acute angle and open to the rear.  
Redemption. The repurchase of ones property after it has been sold in foreclosure; this right to redeem lapses after a specified time.  
Rcer. 1. A pipe fitting which connects pipes of different sizes. 2. A tile trim unit used to rce the radius of a bullnose or a cove to another radius or to a square. 3. Volatile ingredients used to thin or lower viscosity of a finishing material.  
Rcing Female Adapter. A pipe fitting which is threaded on the inside of at least one end to receive a different size pipe, to make a connection.  
Rcing Flame. An oxygen-fuel gas flame wherein the portion used has a rcing effect; same as Carbonizing Flame.  
Rcing Tee. A pipe fitting which joins three pipes of different sizes at 90 degree angles.  
Rndant Member. Any member of a truss not required for truss stability.  
Redwood Inspection Service (RIS). One Lombard Street, San Francisco, California 94111, (415) 392-7880.  
Redwood. A coniferous timber tree with red heartwood and yellow sapwood.  
Reel. A round device upon which a hose or wire is wound for easy use and storage.  
Re-Entrainment. situation that occurs when the air being exhausted from a building is immediately brought back into the system through the air intake and other openings in the building envelope.  
Reentrant Angle. An angle pointing inward; the opposite of a salient angle.  
Re-Entrant Corner. An inside corner of a surface, producing stress concentrations in the roofing or waterproofing membrane.  
Refectory. A dining hall.  
Refinancing. The reorganization of the loans on a property usually by finding new loans at lower interest rates or larger amounts and paying off the old loans.  
Refined Shellac. A grade of orange or white shellac from which the wax has been removed.  
Reflectance. The ratio of light reflected by a surface to the incident light falling on the surface.  
Reflected Ceiling Plan. An architectural drawing of a ceiling seen as though it is reflected from the floor.  
Reflection Cracks. Cracks in asphalt overlays that reflect the crack pattern in the pavement structure underneath; caused by vertical or horizontal movement in the pavement beneath the overlay, brought on by expansion and contraction with temperature or moisture changes.  
Reflection Pool. An ornamental, usually shallow, pool of water designed to reflect an important architectural element beyond.  
Reflection. The return of light and sound waves from a surface.  

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