Question

Which of the following is true about bamboo used in buildings?

• A. It cannot be used for structural components such as beams and trusses
• B. It has very low tensile strength
• C. It is not as long lasting as timber
• D. It cannot be combined with steel reinforcement

Hint:

While bamboo is praised for its high tensile strength and structural flexibility, its organic, starch-heavy composition means it is not as naturally long-lasting as seasoned timber unless treated with intensive chemical preservatives.

Answer 1

The Correct Option is C

Concept: Bamboo is a fast-growing, sustainable organic material widely used in bio-composite construction. It features excellent mechanical properties along its longitudinal fibers. However, due to its high starch content and hollow structural shape, it is highly vulnerable to environmental moisture, fungal rot, and insect attacks if left untreated. Step-by-step Explanation:
• Analysis of Option (A): Bamboo culms possess favorable strength-to-weight ratios and are frequently engineered into structural columns, beams, space frames, and roof trusses. Therefore, this statement is false.
• Analysis of Option (B): Bamboo has notable longitudinal tensile strength, often compared to mild steel on a per-weight basis, making this statement incorrect.
• Analysis of Option (C): Bamboo is a grass rather than a dense hardwood. It lacks the natural resins and high lignin density that protect long-lasting timbers (such as Teak or Sal). Without chemical preservation treatments, raw bamboo deteriorates rapidly under exposure to weather and boring insects within a few years, making it significantly less durable than seasoned timber. This statement is accurate.
• Analysis of Option (D): Modern composite engineering regularly combines bamboo with steel connectors or concrete cores to improve structural performance. Thus, its shorter natural lifespan relative to timber is its primary limitation.