crossarm

A worker installs a new crossarm on a wooden utility pole.

Definition

1. Noun:
   • A horizontal support bar: In engineering and construction, a "crossarm" is a horizontal bar or beam that extends perpendicularly from a vertical structure, such as a utility pole or a frame, to provide support for wires, cables, or other components.
   • A transverse structural element: More broadly, it refers to any rigid piece placed crosswise to connect or brace two vertical parts, often used in electrical transmission, telephone lines, or scaffolding.

Usage Examples

• Noun:
  • The utility worker attached the power lines to the crossarm on the wooden pole. (The horizontal bar on the pole supports the wires.)
  • The crossarm of the transmission tower was made of galvanized steel to resist corrosion. (The transverse beam is a key part of the tower's structure.)
  • During the storm, one crossarm snapped under the weight of ice. (The horizontal support bar broke.)

Advanced Usage

• "crossarm assembly": a complete unit consisting of the horizontal bar and its mounting hardware.

  • The crew replaced the entire crossarm assembly during the maintenance check. (They swapped out the bar and its fittings together.)

• "crossarm brace": an additional diagonal support attached to a crossarm to increase stability.

  • A crossarm brace was installed to prevent the bar from swaying in high winds. (An extra support piece for reinforcement.)

Variants and Related Words

• Crossarm (n): the base form; no common variants (e.g., "cross-armed" is a different term meaning with arms crossed).
• Crossarmless (adj): lacking a crossarm.
  • The old pole was crossarmless, so the cables were attached directly to the pole. (The pole had no horizontal bar.)

Synonyms

• Transverse beam: a beam placed across another structure.
• Crossbar: a bar that goes across something (often used interchangeably, though "crossbar" is more general).
• Horizontal arm: a descriptive term for the same component in engineering contexts.

Phrasal Verbs

• None directly associated with "crossarm" as a noun. However, in verb form (rare), "to crossarm" would mean to equip with a crossarm.
  • They crossarmed the new poles before stringing the cables. (They installed crossarms on the poles.)

Related Idioms

• No common idioms include "crossarm," as it is a technical term. In figurative language, "crossarm" might appear in engineering jargon, e.g., "tighten the crossarm" (to secure a connection).