T & G (Tongue and Groove)    Boards shaped with a tongue on one edge and a groove on the other so that they can be fitted together without gaps.Often used as paneling on interior walls.
Tab      The exposed portion of strip shingles defined by cutouts.
Tie-down    A metal strap or plate connecting the wood frame of wood construction buildings to the foundation to resist separation by seismic forcrs.
Time and materials contract     A construction contract which specifies a price for different elements of the work in terms of materials, labor, as well as overhead, profit and other burden.. Such a contract may have a maximum price.
Trimmer     A wood frame member at the side of openings, parallel to studs or joists, and supporting a header.

Tread      On stairs the level part of a step. The dimensionas are the width and the horizontal distance from the surface of one riser to the surface of the next.This distance does not include the nosing.
Treated lumber     A wood product that has been impregnated with chemicals to reduce damage from wood rot or insects. Often used for the portions of a structure likely to be regularly in contact with moisture.
Trim      The finish materials in a building, such as moldings, applied around openings or at the floor and ceiling of rooms.
Truncated      The apex of a roof is replaced by a flat, often balustraded deck.
Truss      A manufactured wood member often in the form of a large triangle used to form the ceiling joists and rafters.