Tapered Member

A built-up plate member consisting of flanges welded to a web of variable depth.

Tempcon Panel

A panel assembly consisting of an insulated core material sandwiched between an interior and exterior skin panel. Sometimes called Sandwich Panel.

Throat

Minimum width of the ventilator air inlet.

Thrust

A horizontal component of a reaction.

Tolerance

A fractional allowance for variations from the specified standard weight, dimensions, etc., of mechanical construction.

Track

A metal way for wheeled components, specifically one or more lines of ways, with fastenings, ties, etc., for a crane way, monorail or sliding door.

Translucent

Allowing the passage of light, but not permitting a clear view of any object. A translucent material is semi-transparent or semi-clear.

Transverse

From sidewall to sidewall of a building.

Tread

The horizontal step of a staircase.

Trim

Pre-formed light gauge metal used as a cover to cut edges, sides or junctions of sheeting.

Truss

A structural member, made up of several individual parts welded or bolted together, designed to carry a tension or compression force with the complete structure acting as a beam.

Tube Column

A vertical structural support member made of a hollow square tube. Normally used as an interior support column in Multi-Span buildings or mezzanine floors.

Turn-of-Nut Method

A method of tightening high strength bolts in accordance with AISC: "Specifications for Structural Joints using ASTM A325 Bolts".