Term
Definition
- On Center (O/C) 2 likes
- Also referred to as center to center
- On the Stump 0 likes
- See Standing Timber
- One Piece Toilet4 likes
- A toilet in which the water tank and the bowl are molded in a single piece of vitreous china for aesthetic purposes and quiet functioning
- One-Family Dwelling 2 likes
- A place of dwelling consisting of only a single dwelling
- One-Way Action 2 likes
- Structural effect of a slab between two bearing walls or between two parallel beams
- One-Way Concrete Joist System 2 likes
- A strong framing system made of concrete where concrete joists are spaced near each other between parallel beams or bearing walls
- One-Way Solid Slab 1 like
- A concrete roof slab or floor set between parallel beams or walls, with structural reinforcement in one direction
- Opaque Glaze 2 likes
- A glaze that is not transparent, with or without color
- Open Bid/Estimate 2 likes
- A person or entity requests bids or estimates from service providers prior to qualifying them. Contractors can see and bid on project-specific information in the request for proposal (RFP)
- Open Circuit 0 likes
- An incomplete electric circuit disrupted via a switch, open breaker, fuse or a break in a conductor
- Open Compressor3 likes
- A type of external drive compressor that is not airtight
- Open Decking 3 likes
- When the joists underneath a deck are visible and unprotected
- Open Display Case 2 likes
- An open refrigerator case for displaying items commercially; keeps contents at cool temperatures
- Open Front Seat1 like
- A type of toilet seat used in public toilets; has an opening in the front
- Open Hole Inspection 1 like
- An engineer or municipal supervisor examines an excavation to decide upon an appropriate foundation to fill the hole
- Open Listing 0 likes
- A property owner makes a non-exclusive agreement with one or more real estate agents to sell or lease a property
- Open Run-Around 0 likes
- A way of recovering heat from exhaust air by including a fluid into the supply and exhaust air streams alternately, thus transferring latent and sensible heat
- Open Time 1 like
- A specific time frame in which a bond coat is able to stick to a tile and fasten the tile to a substrate
- Open Type Decking 1 like
- When the joists underneath a deck are visible and unprotected
- Open-Graded Aggregate 2 likes
- An aggregate which contains almost no mineral filler; the void spaces are quite large
- Open-Graded Asphalt Friction Course 3 likes
- A skid-resistant surface course that thwarts hydroplaning by enabling rainwater to drain rapidly through the course and exit the shoulder; this largely void asphalt mixture is composed mainly of coarse aggregate of a single size
- Open-Grained Wood 1 like
- Types of wood with sizeable pores including ash, walnut and oak; also known as Coarse Textured or Coarse-Grained
- Open-Web Steel Joist 0 likes
- Welded assembled steel joist employed at close distances from each other to reinforce floor or roof decking
- Operable Door 2 likes
- One of two doors that usually functions
- Operable Part 1 like
- A component of equipment or an appliance such as a coin slot or handle, used to insert or withdraw objects, start, stop or modify it
- Operating Instructions 2 likes
- A booklet or sheets with written directions and descriptions for the proper operation of equipment or components; provided by the manufacturer
- Operating Leverage 2 likes
- The ratio of the profit percentage change to the sales percentage change, measuring how revenue growth translates into growth in operating income
- Operating Pressure 2 likes
- Positive or negative (vacuum) pressure at which a refrigerating system normally operates
- Operating Profit 1 like
- A business’ earnings minus all operating expenses of a business; also known as Earnings Before Interest and Tax (EBIT) or Operating Income
- Operating Room 0 likes
- A hospital room especially designed and equipped for surgeries
- Operation Expenses 1 like
- Total expenditure for a project or business; includes the cost of products, general and administrative expenses and any indirect expenses
- Opposed Blades 0 likes
- A damper with two sets of blades which are connected in a way that the adjacent blades are able to open and spin in opposing directions
- Option 0 likes
- A choice or alternative
- The right to buy, sell, or lease an item, which is kept open for consideration for a certain length of time
- Optionee 0 likes
- A person who is given an option
- The potential buyer or lessee in a real estate option
- Optionor 0 likes
- The person who offers an option
- In a real estate option, the owner or lessor who wants to sell or lease
- Or Equal 1 like
- Used in instructions or specifications to stipulate that any substitutions must be equivalent to the original
- Oral Agreement 0 likes
- A contract that has been agreed to verbally rather than in writing
- Orange Mineral 0 likes
- Red lead which is made by baking basic carbonate white lead; mainly employed for printing ink
- Orange Peel 0 likes
- The pocked texture of a fired glaze which looks like an orange peel‘s surface
- Defect in spray painting in which the lacquer coat does not smooth out but remains coarse; similar to when an orange peel is peeled
- Orbital Sander1 like
- A hand-held power sander that moves in a circular orbit
- Ore 2 likes
- Rock or other naturally occurring solid mineral that contains extractable quantities of metals or minerals of commercial value
- Organic 1 like
- A chemical compound that has carbon
- Consisting of hydrocarbons or derivatives thereof, or matter of biological origins
- Relating to or derived from living matter
- Organic Adhesive 1 like
- An adhesive prepared from naturally occurring organic material that does not require more liquid or powder, used for attaching tile to back-up material with the thin set method; sets by evaporating
- Organosol 3 likes
- Film that has synthetic resin plasticizer and solvent; the spreading of resin particles in a mixture which has in excess of five percent volatile content
- Oriel Window 2 likes
- A type of bay window which is supported by corbels or brackets and projects out from a wall
- Oriented Strand Board or OSB 1 like
- A fabricated 4 feet by 8 feet wooden board that is composed of 1 inch to 2 inch wood chips and adhesive, and frequently used instead of plywood
- Orifice 3 likes
- An opening
- An attachment for the nozzle of a plastering machine hose; can vary in shape and size, and may be modified to create a pattern on the plaster while it is cast onto a given surface
- An opening of a furnace or boiler through which fuel is expelled
- Original Contractor 0 likes
- A contractor who works directly with a real property owner
- Ormolu 0 likes
- Gilded bronze or gold amalgam of copper, zinc and tin; used in furniture decorations and ornaments
- Ornamental Facing 0 likes
- A design made by positioning stone, brick, tile and other masonry items in a decorative manner in masonry
- Ornamental Metal1 like
- A feature on a metal structure to embellish or decorate the appearance
- Orthogonal 1 like
- Involving right angles; at right angles, perpendicular
- Orthographic Projection 0 likes
- A two-dimensional representation of an object on paper or other surface; the projection is at right angles to both the view and the projection lines, as in floor plans, and sections of homes
- Orthotropic 2 likes
- With different characteristics or strengths in mutually perpendicular symmetry planes; a particular type of anisotropy

Garnet Paper
Abrasive, reddish, tough, sharp paper; derived from the semi-precious garnet jewel; more durable than flint paper
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