Consider the following statements : The wall thickness depends upon 1. the anticipated load to come on the wall 2. the quality of wall material 3. the overall height of the wall 4. the height between floors 5. the spacing between buttress and cross-wall Which of the above statements are correct?
- A1, 2, 3, 4 and 5Correct
- B1, 2, 3 and 4 only
- C1, 2, 3 and 5 only
- D2, 3, 4 and 5 only
Solution
Concept
Factors governing wall thickness
Step-by-step solution
1. Load carried by the wall (1). 2. Strength and quality of the masonry material (2). 3. Overall height (3) and storey height (4), through slenderness. 4. Spacing of buttresses or cross-walls, which limits the effective length (5).
Explanation
The thickness of a load-bearing wall is governed by the load, the material, and slenderness, which depends on height, floor-to-floor height and lateral support from cross-walls or buttresses.
Why the other options are wrong
Each of the other options omits a valid factor.
Shortcut
Load, material, height, storey height, lateral supports.
Common mistake
Leaving out the spacing of cross-walls.
Correct answer: A) 1, 2, 3, 4 and 5