Which span length category applies to 20 ft < L ≤ 125 ft?

• A. Short Span Bridges
• B. Culverts L ≤ 20ft
• C. Long Span Bridges
• D. Medium Span Bridges

Answer: (A)

Span length categories in bridge practice separate structures by the span they are designed to carry. Very small spans, up to about 20 ft, are often treated as culverts rather than bridges. Short spans go up to roughly 125 ft, while larger spans are labeled medium or long depending on their length. Since 20 ft < L ≤ 125 ft falls within that upper limit, it belongs to the short span category. The other options don’t fit this interval: culverts are specifically L ≤ 20 ft, and medium or long spans describe spans longer than this range.