tender for construction of gymnastic pit for gymnasium hall at gc crpf, prayagraj; 1 demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of engineer - in - charge.nominal concrete 1:3:6 or richer mix (i/c equivalent design mix) 2 earth work in excavation by mechanical means (hydraulic excavator)/ manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by engineer-incharge. all kinds of soil 3 filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift upto 1.5 m. 4 providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level :1:1½:3 (1 cement: 1½ coarse sand (zone-iii) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources) 5 providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement - all work up to plinth level :1:1.5:3 (1 cement : 1.5 coarse sand (zone-iii) derived from natural sources : 3 graded stone aggregate 20 mm nominal size de rived from natural sources) 6 centering and shuttering including strutting, propping etc. and removal of form for. walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc. 7 providing and fixing tie bolt, spring coil and plastic cone in wall shuttering complete as per the direction of engineer-in-charge. 12 mm dia. & 100 mm length 8 steel reinforcement for r.c.c. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. thermo-mechanically treated bars of grade fe-500d or more. 9 12 mm cement plaster finished with a floating coat ofneat cement : 1:3 (1 cement : 3 fine sand) 10 20 mm cement plaster : 1:4 (1 cement : 4 fine sand) 11 structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete.