The effective span of an arch in masonry is measured as:
Choose the correct answer
Distance between outer faces of abutments
Clear span between inner faces of supports plus the depth of skewbacks (bearing on abutments), typically = clear span for semicircular arches
Height of arch only
Width of arch barrel
Correct Answer
B. Clear span between inner faces of supports plus the depth of skewbacks (bearing on abutments), typically = clear span for semicircular arches
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Arch effective span = clear span between faces of supports (for flat or segmental arches with no defined skewback). For semicircular arch: effective span = clear span. Arch masonry is measured as the volume of masonry in the arch ring (length x width x thickness of ring). Centring (temporary support during construction) is measured separately.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to AE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.