Inventory 
Property held for sale or to be used in the manufacture of gods held for sale.

Inventory Checklist 
List of records kept of what is owned.

Inverse Condemnation 
Legal action against the government when property rights have been compromised or usurped by a government activity without a formal condemnation or eminent domain procedure.

Investment 
Expenditure to buy property or other capital assets that generate income. Alternately, securities of real estate companies or capital assets.

Investment Analysis 
Analysis of the risks and rewards to an individual in making a particular property investment. It considers the cost of the original investment, the investment return over a period of time, the suitability of the investment and the probability of success.

Investment Life Cycle 
Time interval between buying a real estate investment and selling it.

Investment Property 
Real estate, such as rental properties, which generate income. 

Involuntary Alienation 
Loss of property due to attachment, condemnation, foreclosure, sale for taxes or other involuntary transfer of title. 

Involuntary Lien 
Lien on property such as for the nonpayment of real estate taxes or mechanic's lien.

I persona 
Latin for I am the person, meaning that is actually the person himself/herself.

Ipso Facto
The result of an act or a fact.

Iron 
1. White, easily molded, ductile, metallic chemical element found in the earth, that can be easily magnetized, rusts quickly in damp air, and is vital to plant and animal life. 
2. Most common and important of all metals. Atomic symbol Fe; Atomic number 26: Atomic weight 55.847. 

Iron Alloy 
Iron and one or more metals combined for the purpose of reducing cost or enhancing performance of the metal material. Stainless steel, used when corrosion resistance is needed, is created by the addition of chrome and nickel. Adding chrome and molybdenum increases the high temperature strength of the resulting metal. Carbon steel, which is harder and stronger than iron, is controlled by its carbon content and used to make chisels and drill bits because it can be sharpened to a fine edge and its hardness will help to keep it sharp.

Iron, Cast 
Both ductile iron and gray iron, which have a high carbon content and relatively brittle, are called cast iron and shaped by the casting process. 

Iron, Ductile Cast
Commonly used for fittings, valves, pipe, etc., this iron has magnesium or cerium added while in a liquefied state, so that it can be formed into globular nodules. Also called nodular cast iron, it has good corrosion-resistant characteristic and is less brittle than gray cast iron.

Iron, Gray Cast 
Iron whose carbon content is iron carbide and carbon in the form of graphite flakes or iron carbide, was the material used for sanitary waste systems and water main piping, pipe wrenches, valves, etc. Gray cast iron is also called cast iron and is highly corrosive resistant and economical but is, unfortunately, brittle.

Ironing Center 
Closet containing a built-in ironing board. Iron, Ingot Iron that has few impurities and a low level of carbon. 

Iron, Malleable Case 
Used for pipe fittings, this form of white cast iron has been heat treated, which allows it to be more easily formed and less brittle. 

Iron Phosphate Coating 
Industrial equipment cleaner and primer. 

Iron, Pig 
Crude iron as it comes from a blast furnace during the refining of iron ore. Iron Soldering (INS) Use of a solder iron as the source of heat to solder. 

Ironwood
Extremely hard, heavy wood taken from the Lyonothamnus Floribundus or Caprinus Caroliniana trees of southern California. Used more commonly in furniture than in building, due to its cost. 

Iron, Wrought 
Iron that has small amount of slag added to the hot iron at a temperature that will not fuse it to the iron, and distributed throughout. Wrought iron is used primarily in fences, railings, screens and ornamental ironwork. 

Irregular Brace Table 
Twelfth and sixteenth scales on a framing square, usable to calculate sides of right triangles with angles other than 45 degrees. Regular framing square brace tables can only calculate dimensions for right triangles with 45-degree angles.

Irrevocable 
Something that cannot be taken, returned, or revoked.

Irrigation System 
An agricultural technique of supply water to land to sustain the growth of crops, which has been noted being used as early as 5000BC. 

Island Zoning 
The zoning of a portion of land in a given area for different purposes than its surrounding functions. Also called spot zoning. 

Isocyanate Resin 
A chemical binder used in making paint. Isofootcandle Graph Graph that shows lighting patters and illumination data for outside lighting. 

Isofootcandle Lines 
Also called isolux lines, they are the lines on the isofootcandle graph that illustrate lighting patterns. 

Isolation 
1. Being apart from others or placed alone. 
2. Quarantined. 

Isolation Joint 
Joint whose purpose is to prevent buckling or cracking of a structure when temperature changes occur, which will cause expansion or contraction or to protect against movement in horizontal or vertical directions. 

Isometric Drawing or Projection 
Three-dimensional view drawing, which shows the routing of the piping layout. To give a perspective of depth the angles are shown at 120 degrees rather than 90 degrees. 

Isothermal 
Action that takes place with no change in temperature. 

Italian Architecture 
Style of architecture introduced into American prior to the Civil War, it is modeled after Renaissance country homes in northern Italy. They were usually relatively large brick houses, which were characterized by having an off-center square tower and a flat roof with heavy overhanging eaves supported by braces.