Which of the following types of bridges is used for long span bridges?
- AGuided bridges
- BGirder bridges
- CRoller bridges
- DTrussed bridgesCorrect
Solution
Concept
Trussed Bridges
Formula
No
Step-by-step solution
No calculation required. Identify that trussed bridges use triangular frameworks to efficiently span longer distances compared to simple girder or other options, making option D the correct answer.
Explanation
Trussed bridges use a rigid framework of connected triangular units to distribute heavy loads efficiently over longer spans using relatively light materials.
Shortcut
Remember "Truss = Trust for Long Spans" — triangular trusses distribute heavy loads efficiently over long distances.
Common mistake
Selecting Girder bridges (Option B) by confusing them as suitable for long spans because of their widespread use in short-to-medium span highway construction, rather than recognizing that trussed bridges distribute loads more efficiently over longer distances.
Correct answer: D) Trussed bridges