Surface of a stone perpendicular to the line of pressure is known as
- Abed surfaceCorrect
- Bvertical face
- Cbedding plane
- Ddiaper
Solution
Concept
The bed of a stone is its surface perpendicular to the line of pressure.
Step-by-step solution
1. In stone masonry, load acts mostly in the vertical direction. 2. The surface of a stone at right angles to this load is called the bed. 3. So the answer is (A) bed surface.
Explanation
The bed is the stone surface that is perpendicular to the line of pressure. Stones are laid so that the load acts at right angles to the bed. This gives the best strength.
Why the other options are wrong
B: The vertical face is the exposed face, usually parallel to the load, not perpendicular. C: A bedding plane is the natural layer plane of a sedimentary rock. D: Diaper is a decorative pattern work in masonry.
Shortcut
Bed lies flat and the load presses on it, so bed is perpendicular to pressure.
Common mistake
Confusing the bed surface with the natural bedding plane of a rock.
Correct answer: A) bed surface