Indian Institute Of Technology Tender

Providing and fixing tiled false ceiling of specified materials of size595x595 mm in true horizontal level, suspended on inter lockingmetal grid of hot dipped galvanized steel sections ( galvanized @120 grams/ sqm, both side inclusive) consisting of main "T" runner with suitably spaced joints to get required length and of size 24x38mm made from 0.30 mm thick (minimum) sheet, spaced at 1200mm center to center and cross "T" of size 24x25 mm made of 0.30mm thick minimum) sheet, 1200 mm long spaced between main"T" at 600 mm center to center to form a grid of 1200x600 mm andsecondary cross "T" of length 600 mm and size 24x25 mm made of0.30 mm thick (minimum) sheet to be interlocked at middle of the1200x600 mm panel to form grids of 600x600 mm and wall angle ofsize 24x24x0.3 mm and laying false ceiling tiles of approved texturein the grid including, required cutting/making, opening for serviceslike diffusers, grills, light fittings, fixtures, smoke detectors etc. Main"T" runners to be suspended from ceiling using GI slotted cleats ofsize 27 x 37 x 25 x1.6 mm fixed to ceiling with 12.5 mm dia and 50mm long dash fasteners, 4 mm GI adjustable rods with galvanisedbutterfly level clips of size 85 x 30 x 0.8 mm spaced at 1200 mmcenter to center along main T, bottom exposed width of 24 mm of allT-sections shall be pre-painted with polyester paint, all complete forall heights as per specifications, drawings and as directed byEngineer-in-charge.

GI Metal Ceiling Lay in perforated Tegular edge global white color tiles of size 595x595 mm and 0.5 mm thick with 8 mm drop; made of GI sheet having galvanizing of 100 gms/sqm (both sides inclusive) and 20% perforation area with 1.8 mm dia holes and having NRC (Noise Reduction Coefficient ) of 0.5, electro statically polyester powder coated of thickness 60 microns (minimum), including factory painted after bending and perforation, and backed with a black Glass fiber acoustical fleece