An R.C.C. lintel spans a 2 m opening within a brick wall. With the floor-to-roof height at 2.9 m and the opening top at 2.1 m above the floor, the lintel must be designed to carry its self-weight plus_______________?
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Answer: C. UDL of wall + load from the roof
Explanation
An R.C.C. lintel beneath a floor-to-roof wall must carry its own dead weight plus the combined UDL of the wall. Walls located below roof levels transmit both their own self-weight and direct vertical loads from the roof structure. The total design load on the lintel therefore combines the continuous wall load and the imposed roof loading. Lintels are horizontal structural beams placed above door and window openings to support masonry walls situated overhead. Load distribution over small wall openings typically follows empirical rules depending on masonry height and roof proximity. Dead loads from walls and roofs must be accurately estimated to ensure adequate structural load paths down to foundations.
Option A assumes a purely triangular masonry load distribution which only applies when walls are very tall and unconstrained. Option B neglects the crucial vertical contribution of roof loads transmitted directly through the upper masonry wall. Option D incorrectly applies a triangular load pattern instead of treating the wall above as a uniform distributed load.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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