Definition

1. Noun:
   • A structural beam with an I-shaped cross-section: An "i-beam" is a girder or beam used in construction and engineering whose cross-sectional shape resembles the capital letter 'I'. This shape provides high strength and load-bearing capacity while using less material than a solid beam.

Usage Examples

• Noun:
  • The warehouse's roof is supported by massive steel i-beams.
  • The engineer specified an i-beam for the main support structure of the bridge.

Advanced Usage

• "I-beam construction": A method of building that utilizes i-beams as the primary structural framework.
  • The skyscraper's skeleton was built using i-beam construction for maximum stability.

Variants and Related Words

• I-girder (n): A synonym for i-beam, often used interchangeably, though sometimes implying a larger or primary support member.

  • The central span of the bridge rests on two massive I-girders.

• H-beam (n): A similar structural beam with a cross-section resembling the letter 'H', often with wider flanges than a standard I-beam.

  • For this heavy-load application, an H-beam was chosen over a standard i-beam.

Synonyms

• I-girder: A girder with an I-shaped cross-section.
• Rolled steel joist (RSJ): A common term, especially in British English, for a hot-rolled steel i-beam.

Related Phrases

• I-beam flange: The horizontal top and bottom plates of the I-beam.

  • The load is transferred from the floor to the i-beam flanges.

• I-beam web: The vertical central section connecting the two flanges of the I-beam.

  • Shear forces are primarily resisted by the i-beam web.

Noun

1. girder having a cross section resembling the letter `I'