tender for construction of retaining wall and open surface drain at 50 bedded composite hospital at bsf campus mawpat under ftr hq bsf meghalaya sh for protection from land slide.; 1 earth work in excavation by mechanicalmeans (hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, for all lift, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m. all kinds of soil. 2 providingandlayinginpositioncementconcreteof specified grade excluding the cost of centering and shuttering - all work up to plinth level :1:2:4 (1 cement : 2 coarse sand (zone-iii) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources) 3 providingandlayinginpositioncementconcreteof specified grade excluding the cost of centering and shuttering - all work up to plinth level 1:5:10 (1 cement : 5 coarse sand (zone-iii) derived from natural sources : 10 graded stone aggregate 40 mm nominal size derived from natural sources) 4 brick work with common burnt clay f.p.s. (non modular) bricks of class designation 7.5 in foundation and plinth in: cement mortar 1:6 (1 cement : 6 coarse sand) 5 random rubble masonry with hard stone in foundation and plinth including levelling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20mm nominal size) upto plinth level with : cement mortar 1:6 (1 cement : 6 coarse sand). 6 providing and fixing on wall face unplasticised rigid pvc rain water pipes conforming to is : 13592 type a, including jointing with seal ring conforming to is : 5382, leaving 10 mm gap for thermal expansion, (i) single socketed pipes. (i)single socketed pipes. 75 mm diameter 7 12 mm cement plaster finished with a floating coat of neat cement of mix : 1:4 (1 cement: 4 fine sand) 8 pointing on stone work with cement mortar 1:3 (1 cement: 3 fine sand) : flush/ ruled pointing