Renovation of Boys Hostel in College Campus: Structural Assessment, Retrofitting Design and Cost Estimation

The Rebound Hammer NDT on all 132 RCC columns revealed fck ranging from 9 MPa to 30.5 MPa. Column status: 26 Safe, 22 Marginal, 47 Deficient, 37 Severely Deficient. Columns C3 and C11 (fck = 9 MPa) govern retrofitting design; jacketing raises capacity from 593 kN to 3,514 kN. AAC slab reconstruction provides 55–60% dead load reduction. Staircase beam jacketing increases flexural capacity from 32 kN·m to 220 kN·m. Redesigned plumbing and electrification systems significantly improve safety, hygiene, and energy efficiency. Total renovation cost ≈ ₹1.35 Crore (incl. GST, 5% contingency, 3% PMC) — 55% less than reconstruction (₹3.01 Crore). Scientific condition assessment combined with planned rehabilitation extends institutional building service life by 20–30 years.

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