Providing and fixing of false ceiling at all heights of 600x600x15mm/600*1200*l5mm Mineral Fibre ceiling tiles of type RH-99 laid in grid system. The frame work comprise of made of GI 120 GSM coating with minimum 0.3mm thickness main runner spaced at 1200mm centre to centre securely fixed to the structural soffit by approved hangers at 1200mm maximum centres. Hangersa (Gl wire of 4mm dia) to be fixed by approved roof plug, level adjusters and screw etc. The last hanger at the end of each main runner should not be greater than 450mm from the adjacent wall. Flush fitting 1200mm long cross tees (with double stiching) to be interlocked between main runners at 600mm centres to form l200x600mm modules. Cut across tees longer than 600mm to be supported independently. 600x600mm modules to be formed by fitting 600mm long flush fitting cross tees centrally between the 1200mm cross tees. Perimeter wall angle secured to walls at 450mm maximum centres complete in all respects as per specifications.