Definition
In aircraft sheet metal and structural construction, ties are structural members or fasteners that hold two or more components together to resist tension or pulling-apart forces. In a truss-type structure, ties are the members that carry tensile loads, as opposed to struts, which carry compressive loads.
Plain English
Parts of a structure whose job is to hold things together by resisting forces that would pull them apart.
Context Anchor
Seen in airframe structure, maintenance manuals, and inspection discussions about how aircraft parts carry loads.
Derivation
From the Old English 'tigan,' meaning to bind or fasten. The structural meaning carries the everyday sense directly: a tie is something that keeps two parts joined against forces trying to separate them.
Why Pilots Care
Properly applied ties prevent wind damage, especially on exposed ramps where gusts can lift or roll an unsecured aircraft.
Analogy
A rope between two posts is a simple tie. It can hold the posts from spreading apart, but it cannot push them back together.
Intuition Check
Do not think of ties only as straps, knots, or clothing. In aircraft structure, ties are load-carrying parts that resist pulling forces.
Example Sentence 1
In a Warren truss fuselage, the diagonal members alternate between ties and struts depending on which way the load is acting.
Example Sentence 2
Strong crosswinds made it necessary to add extra ties to the tail to keep the airplane from pivoting.