bids are invited for custom bid for services - transportation and installation of gate belt drive head structure roller pvc belt etc also extension and tail end shifting of gate belt for development and depillaring panels and dismantling of complete drive head belt struc.. - part - a - dsr items , excavation work in foundation trenches or drain not exceeding 1.5m in width or plan including dressing of sides and ramming of bottom lift upto 1.5m ……………... ...etc , providing and laying in position cement concrete of specified grade excluding the cost of centring & shuttering 1:2:4 (1cement, 2course sand, 4 graded stone 20mm) , centring in and shuttering including, strutting, prospering etc and removal of form for foundation footing, bases of column etc. for mass concrete. , part - b - non - dsr items , transportation & installation of 02 x 55 kw (800mm) belt drive head with all accessories and electricals up to initial lead 50 mtr , transportation & installation of 02 x 90 kw (1000mm) belt drive head with all accessories and electricals up to initial lead 50 mtr