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Questions and Answers
What is a primary design consideration for a dog-legged staircase?
What is a primary design consideration for a dog-legged staircase?
- Ensuring appropriate headroom and safety (correct)
- Reduction of staircase width for aesthetic purposes
- Minimizing the total number of steps
- Incorporation of straight landings between flights
Which of the following is a characteristic of cantilever retaining walls designed for horizontal backfill?
Which of the following is a characteristic of cantilever retaining walls designed for horizontal backfill?
- They generally require more material than conventional walls
- They are designed with vertical shear strength considerations
- They rely primarily on passive earth pressure for stability (correct)
- They are independent of the active earth pressure acting on them
What is a common error in the design of dog-legged staircases?
What is a common error in the design of dog-legged staircases?
- Overestimating the load-bearing capacity of stairs
- Ignoring the impact of landing positions on user flow (correct)
- Incorporating too many landings without adequate spacing
- Not allowing enough width for handrails
What is one advantage of using cantilever retaining walls for horizontal backfill applications?
What is one advantage of using cantilever retaining walls for horizontal backfill applications?
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Which factor is least important in the design of a dog-legged staircase?
Which factor is least important in the design of a dog-legged staircase?
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Study Notes
Dog-Legged Staircases
- Primary design consideration: Ensuring adequate headroom clearance between the ascending and descending flights
- Common design error: Insufficient headroom, leading to discomfort or potential head injuries
- Least important factor: Material aesthetics, as functionality and safety are paramount
Cantilever Retaining Walls
- Characteristic for horizontal backfill: They are typically designed with a vertical face and a horizontal base, relying on the cantilever effect for stability.
- Advantage for horizontal backfill: They provide a cost-effective solution compared to other retaining wall types, minimizing material usage for horizontal backfill applications.
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