IBC (International Building Code): A model building code developed by the International code council adopted throughout most of the United States.

In Situ: A Latin term that means “in place” or “on site”, the term applies to testing done on site, or on materials in their original location, as opposed to testing done in a laboratory.

incipient decay: The early stages of decay that has not proceeded far enough to soften or otherwise impair the hardness of the wood. Usually accompanied by discoloration or bleaching.

incompatible: Unsuitable for use together because of undesirable chemical or physical effects- the term indicates that one material cannot be mixed with another specified material without separation or impairment of properties.

inert: Not moving or acting, chemically inactive- portion of finishing agents which are stable (non-reactive).

infeed: Direction, area or process of feeding a work piece into a blade or cutter.

inorganic: compounds that do not contain carbon-

insert: The part of a door that fills the space inside the door frame. Can be raised panel, flat panel, glass or other material.

insert tooling:

insoluble: Not capable of being dissolved in liquid.

intercoat adhesion: The adhesion between successive cots of paint.

intercoat contamination: The presence of foreign matter such as dust or dirt between successive coats of paint.

intergrown knot: Rings of annual growth of the knot are intergrown with those of surrounding wood. Will not fall out , but may have cracks or voids.

interlocked: A term used to describe the grain in the wood where the tree fibers have twisted during growth, resulting in a spiral orientation of the fibers up the trunk rather than parallel to the centerline of the tree.

internal stress: Stress that exists within a piece of lumber even in the absence of applied external forces. Example: Casehardening.

intumescent coating: A type of fire retardant coating which when heated, produces nonflammable gasses which are trapped by the film, converting it to a foam, thereby insulating the material underneath.

isopropyl alcohol: A volatile, flammable liquid used as a solvent, commonly known as rubbing alcohol.