In a singly reinforced rectangular beam, where is the tension reinforcement placed?
Analysis & Theory
In a singly reinforced beam, tension reinforcement is provided at the bottom where tensile stresses develop.
Which of the following is a characteristic of a doubly reinforced beam?
A
Reinforcement only in tension zone
B
Compression reinforcement is provided
D
Reinforcement provided only at mid-span
Analysis & Theory
Doubly reinforced beams have reinforcement in both tension and compression zones to resist higher bending moments.
In lintels, reinforcement is mainly designed to resist:
C
Bending due to wall load
Analysis & Theory
Lintels span over openings and primarily resist bending due to wall loads above them.
Which of the following is a key reinforcement detail for a lintel beam?
C
Bottom longitudinal bars with stirrups
D
No reinforcement needed
Analysis & Theory
Lintels are designed as small beams with bottom longitudinal bars for bending and stirrups for shear.
In a one-way slab, the main reinforcement is placed:
A
In both directions equally
B
Along the shorter span only
C
Along the longer span only
Analysis & Theory
In one-way slabs, the main reinforcement is placed in the shorter span direction where bending occurs.
Two-way slabs are identified when:
A
Longer span is more than twice the shorter span
C
Ratio of longer to shorter span is less than 2
Analysis & Theory
When the ratio of longer span to shorter span is less than 2, the slab is two-way and bends in both directions.
In two-way slabs, distribution bars are provided:
C
Perpendicular to main bars
Analysis & Theory
Distribution (secondary) bars are placed perpendicular to main bars to distribute load and control cracking.
What is the minimum number of bars recommended in the compression zone of a doubly reinforced beam?
Analysis & Theory
At least 2 bars are provided in the compression zone of a doubly reinforced beam to resist compressive forces and maintain symmetry.
In one-way slabs, the secondary reinforcement is mainly provided for:
C
Crack control and load distribution
Analysis & Theory
Secondary reinforcement (distribution bars) helps in controlling shrinkage cracks and distributing loads across the slab.
As per IS 456:2000, the minimum reinforcement in slabs should not be less than:
Analysis & Theory
For mild steel bars, the minimum reinforcement is 0.12% and for HYSD bars, it's 0.12% of gross cross-sectional area as per IS 456:2000.