Mixed-Use Development, Katraj

A mixed-use development at S. No. 61, Katraj, on the southern edge of Pune, with 7,804.80 sq m of construction on a 2,000 sq m plot between a 60 m development-plan road and a 6 m road, with a nala garden along one side. The ground falls across the site, so the building steps down it: two basements of parking with stack parking for eleven cars a level, a lower and an upper ground floor, six shops with mezzanines on the ground and first floors, and nine floors above with a refuge area on the eighth - 45 flats in all, three one-bedroom and forty-two two-bedroom, served by two lifts. The architecture is the architect's; our scope is the MEPF design for the flats, the shops and the basements.

We prepared the calculations in August and the drawings in September 2026. Power: every flat at 75 W per sq m of carpet area and each shop at 150 W, two 10 HP lifts, the water and drinking-water pumps, the basement sump and sub-soil pumps, basement ventilation and staircase pressurisation fans, stack parking and EV charging for 20% of the 46 car bays - nine chargers of 7.2 kW - for 354 kW connected and 167 kW of maximum demand: 185 kVA, or 222 kVA with a 20% margin, on a 315 kVA dry-type transformer indoors, with 54 meter connections (45 single-phase flats, 6 three-phase shops and 3 common) and an 82.5 kVA DG set for the lifts, pumps, ventilation, parking and common lighting at 85% diversity. Water: 225 residents at 135 litres a day - 115 domestic and 20 drinking on separate pipes - and the shops' 59 people at 45 litres: 33.03 kL a day. Storage: in the basements, 43 kL of domestic, 15 kL of raw and 5 kL of drinking water and a 50 kL fire tank, increased in revision R1 to meet the fire NOC; on the terrace, 29 kL domestic, 5 kL drinking and 20 kL fire; and 29.73 kL a day of sewage to a 30 KLD septic tank. Fire: hydrant, sprinkler and jockey pumps drawing on the basement fire tank. Flats and shops: the typical-flat layout places every light, fan, AC, geyser, inverter, gas-leak-detector, water-purifier and video door phone point with a 16-way board behind a 40 A main breaker and 30 mA earth-leakage breaker; each shop gets a three-phase 4-way board behind a 40 A main breaker and a four-pole 30 mA earth-leakage breaker; and the UGT details show the basement tanks, suction pits and pump room against the basement levels.