Anchorage

Connection between the roof or floor framing members (e.g., trusses, bracing, etc.) and the building structure, which is required to transfer the forces from these members into the building.

ANSI/TPI 1

American National Standard, National Design Standard For Metal Plate Connected Wood Truss Construction: Publication of the Truss Plate Institute (TPI) developed under the American National Standards Institute (ANSI) consensus process. Provides the analysis, design and manufacturing criteria for the metal plate connected wood truss industry.

ANSI/TPI 2

American National Standard, Standard For Testing Performance For Metal Plate Connected Wood Trusses: Publication of the Truss Plate Institute (TPI) developed under the American National Standards Institute (ANSI) consensus process. Provides a state-of-the-art consensus standard for testing and evaluating wood trusses designed and manufactured in accordance with ANSI/TPI 1.

Architect

Any registered architect who designs all or a part of the Building Structural System and/or who produces all or part of the Building Structural System Design Documents.

Attic Scuttle

Framed opening with removable cover providing access to the attic.

Axial Force

Push (compression) or pull (tension) force acting along the length of a member. Usually measured in pounds, kips (1000 lb), tons (2000 lb) or the metric equivalents.

Axial Stress

Axial force acting at a point along the length of a member, divided by the cross sectional area of the member. Usually measured in pounds per square inch.

BC

Abbreviation for Bottom Chord

BCSI

Guide to Good Practice for Handling, Installing, Restraining & Bracing of Metal Plate Connected Wood Trusses jointly produced by WTCA – Representing the Structural Building Components Industry and Truss Plate Institute.