tender for earth work in excavation by mechanical means (hydraulic excavat in foundation trenches or drains (not exceeding 1.5 m in width or 1 including dressing of sides and ramming of bottoms, lift upto 1.5 out the excavated soil and disposal of surplus excavated soil as direction of engineer in charge upto 50 m distance.(all kinds of soil.) , providing and laying in position cement concrete of specified grade 1:4:8 (1 cement : 4 coarse sand : 8 graded stone aggregate 40 mm nominal size).all work upto plinth level , grading roof for water proofing treatment with 22.14.1 cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) , 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.110 mm diameter , providing and laying water proofing treatment on roofs of slabs by applying cement slurry mixed with water proofing cement compound consisting of applying: (a) after surface preparation, first layer of slurry of cement @ 0.488 kg/ sqm mixed with water proofing cement compound @ 0.253 kg/sqm. (b) laying second layer of fibre glass cloth when the first layer is still green. overlaps of joints of fibre cloth should not be less than 10 cm. (c) third layer of 1.5 mm thickness consisting of slurry of cement @ 1.289 kg/sqm mixed with water proofing cement compound @ 0.670 kg/sqm and coarse sand @ 1.289 kg/sqm. this will be allowed to air cure for 4 hours followed by water curing for 48 hours. the entire treatment will be taken upto 30 cm on parapet wall and tucked into groove in parapet all around. (d) fourth and final layer of brick tiling with cement mortar (which will be paid for separately. for the purpose of measurement the entire treated surface will be measured. , add for plaster drip course/ groove in plastered surface or moulding to reinforced cement con