CSLB General Building (B)Planning and EstimatingEasy
A contractor is reviewing a structural plan for a new commercial building. Which of the following symbols typically represents a steel wide-flange beam?
- AA circle with a diagonal line through it
- BA solid black rectangle
- CTwo parallel lines with a diagonal line connecting them
- DAn 'H' shape with a thicker middle bar and thinner top/bottom bars
Show answer & explanationAnswer & explanation
Correct answer: D. An 'H' shape with a thicker middle bar and thinner top/bottom bars
The 'H' shape is the standard symbol used on structural plans to represent a wide-flange steel beam, often referred to as an I-beam or W-beam, due to its cross-sectional appearance.
Why the other options are wrong
- A. This symbol typically represents a 'no' or 'do not' condition, or a plumbing fixture.
- B. A solid black rectangle can represent various elements depending on context, but not specifically a wide-flange beam.
- C. This symbol often represents a door swing or a break line, not a structural beam.
Wide-Flange Beam Symbol
On structural drawings, a wide-flange steel beam is commonly represented by an 'H' shaped cross-section.
- Also known as W-beam or I-beam.
- Used for structural support in buildings.
- Symbol resembles the beam's actual cross-section.
Memory trick: Heavy 'H' holds up the structure.