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Which of the following statements is/are true?
1. If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases,
2. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.
3. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.
  • a)
    1 and 3
  • b)
    1 and 2
  • c)
    2 and 3
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following statements is/are true?1.If the spacing of trus...
Roof Truss Spacing and Cost Analysis

Introduction:
Roof trusses are structural components that support the roof covering while transmitting the load to the building's walls. Proper spacing of roof trusses is essential to ensure a safe and cost-effective roof structure. This article aims to discuss the cost analysis of roof truss spacing and the economic spacing of roof trusses.

Statement 1: If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases.

Explanation:
Roof trusses are typically spaced at regular intervals and are designed to carry the roof load. The spacing of trusses affects the size and cost of the individual trusses. If the spacing of trusses is large, the size of the trusses will be larger, resulting in a decrease in the cost of these trusses per unit area. However, if the spacing of trusses is large, the distance between purlins will also increase, increasing the cost of the purlins.

Statement 2: For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.

Explanation:
The economic spacing of roof trusses is the spacing that results in the most cost-effective design. The cost of trusses, purlins, and roof covering all contribute to the total cost of the roof structure. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering. This formula ensures that the cost of the trusses is balanced with the cost of the other components.

Statement 3: The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.

Explanation:
The spacing of roof trusses is determined by the span of the roof and the load it carries. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span. This spacing ensures that the trusses are adequately spaced to support the load and provide a cost-effective design.

Conclusion:
In summary, the proper spacing of roof trusses is essential to ensure a safe and cost-effective roof structure. The spacing of trusses affects the cost of trusses, purlins, and roof covering. The economic spacing of roof trusses is the spacing that results in the most cost-effective design. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.
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Which of the following statements is/are true?1.If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases,2. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.3. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.a)1 and 3b)1 and 2c)2 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is/are true?1.If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases,2. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.3. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.a)1 and 3b)1 and 2c)2 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which of the following statements is/are true?1.If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases,2. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.3. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.a)1 and 3b)1 and 2c)2 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is/are true?1.If the spacing of trusses is large, the cost of these trusses per unit area decreases but the cost of purlin increases,2. For economic spacing of roof trusses, the cost of trusses should be equal to twice the cost of purlins plus the cost of roof covering.3. The spacing of roof trusses can be kept 1/4 of the span for 15 m span and 1/5 of the span for 15 to 30 m of span.a)1 and 3b)1 and 2c)2 and 3d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
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