tender for development of underground sewer at 18c, kalupara lane (slum area) in ward -091,br-x, 1 section(b) - sanitary and drainage works.(b)-(ii) soil pipe and fittings.(a) original works.(16.)supplying, fitting and fixing with cement jointing (3:1) salt glazed stoneware pipe including excavation of earth upto 1.50 metre depth in all sorts of soil both mixed or unmixed and refilling (but excluding concreting at bottom and sides).(iii) 150 mm 2 section(b) - sanitary and drainage works.(b)-(ii) soil pipe and fittings.(a) original works.(16.)supplying, fitting and fixing with cement jointing (3:1) salt glazed stoneware pipe including excavation of earth upto 1.50 metre depth in all sorts of soil both mixed or unmixed and refilling (but excluding concreting at bottom and sides).(ii) 225 mm 3 6.single brick flat soling of picked jhama bricks including ramming and dressing bed to proper level and filling joints with local sand. 4 7.cement concrete with graded jhama khoa (30 mm. size) excluding shuttering. in ground floor and foundation. b) 1:4:8 proportion. 5 23.construction of catch pit 600mmx525mm. (inside measurement) and depth of invert 1000mm. below g.l. with 250mm. thick cement brick work (1:4) over 100mm. thick jhama cement concrete (1:4:8) bed over a layer of brick flat soling including providing 100mm. thick r.c.c. slab with ordinary cement concrete (mix 1:1.5:3) with reinforcement as per standard drawing, brickon- edge flooring with 20 mm. thick cement plaster (1:4) finished fine with 1.5 mm. thick neat cement in the inside walls and invert including supplying and fixing r.c.p.c. gully grid (5 m.t.load bearing capacity) and 150 mm. dia. c.i. syphone including cutting hard crust, excavation, dewatering, back filling and removal of spoils as per standard drawing 6 construction of special inspection chamber pit of size 900mm. x 600mm. (inside measurement) without shaft with 250mm. thick cement brick work (1:4) over150mm. thick jhama cement conc. (1:4:8) bed over a layer of brick flat soling including providing 150mm. thick r.c.c. slab with ordinary cement concrete (mix 1:1.5:3) with reinforcement as per standard drawing over the chamber, brick on edge flooring with ordinary cement concrete (mix 1:2:4) in the invert with 20mm. thick cement plaster (1:4) finished fine with 1.5 mm. thick neat cement in the inside walls and invert including supplying, fitting and fixing 450mm. dia. (15 m.t.) heavy duty r.c.p.c. cover and frame (15 m.t. load-bearing capacity) with ordinary cement concrete (mix 1:2:4) and c.i. steps (4 kg. each) including cutting hard crust, excavation, dewatering, back filling and removal of spoils but excluding shoring as per standard drawing .(depth of invert between 1.15m. to 1.80m. below g.l.) i) average depth of invert 1.15 m. below g.l. 7 manhole connection (upto 450 mm. dia.) including mending good all complete with (1:2:4) cement concrete as per specification and direction of engineer-in-charge.. 8 removal of rubbish,earth etc. from the working site and disposal of the same beyond the compound, in conformity with the municipal / corporation rules for such disposal, loading into truck and cleaning the site in all respect as per direction of engineer in charge. ( ref :pwd (bldg.)-2017, it. no. 13, page no.12) 9 estimated amount 10 add: 9%sgst 11 add: 9%cgst 12 1% lwc