Plain English Meaning

A skeleton of bars or tubes joined together with extra diagonal pieces so the whole thing stays stiff and doesn't flex, twist, or collapse under load.

Full Definition

A structural arrangement of members (such as tubes or beams) connected and reinforced with diagonal supports so that the assembly resists bending, twisting, and other loads as a rigid unit. In a truss-type aircraft fuselage, the longerons, vertical members, and diagonal braces together form a well-braced framework that carries flight and ground loads.

Context Anchor

Seen when studying truss-style aircraft body construction, especially older or tube-frame airframes.

Derivation

"Brace" comes from Old French meaning "two arms" or "to hold firmly," and in construction it refers to a diagonal piece that holds a frame steady. "Well-braced" simply means thoroughly reinforced with such diagonals — enough that the structure won't rack or distort under load.