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Yahya Kaludi | Civil By Yahya Sir on Instagram: "✅ Column Size Is Not Random – The Secret Behind Strong Structures Have you ever wondered why columns in a building are not all the same size or randomly placed? Many people assume it’s just a design choice, but the real reason is engineering science. The size and spacing of columns are carefully calculated to safely carry the building’s load. In this example: Column Size: 9” × 9” Main Bars: 4 Nos. (12 mm Ø) Stirrups: 8 mm @ 150 mm c/c Spacing: 10