Question
Download Solution PDFWhich of the given options represents a doubly reinforced beam?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Doubly Reinforced Beam
- A doubly reinforced beam is one that has reinforcement provided in both the tension and compression zones. This is typically done when the section is not sufficient to resist the applied moments with tension reinforcement alone, and additional reinforcement in the compression zone is needed to carry the extra moment.
- Such beams are used when the depth of the beam is restricted or when the loads are high, necessitating additional reinforcement to achieve the desired strength and serviceability.
Evaluating the Options
Option 1: Two layers of reinforcement in only tension face
- This configuration has reinforcement only in the tension face, not in the compression face.
- This is not a doubly reinforced beam.
Option 2: Double layer of reinforcement in only compression face
- This configuration has reinforcement only in the compression face, not in the tension face.
- This is not a doubly reinforced beam.
Option 3: At least single layer of reinforcement in both tension and compression face
- This configuration has reinforcement in both the tension and compression faces.
- This is the definition of a doubly reinforced beam.
Option 4: Single layer of reinforcement in only compression face
- This configuration has reinforcement only in the compression face, not in the tension face.
- This is not a doubly reinforced beam.
Last updated on Jul 1, 2025
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