Vertical extension of 20 seats in the 50 seated Harina SC Girls Hostel attached to No-1 Harina High School, Thaibong, Sabroom, South Tripura / SH - Building portion including Internal water supply, Sanitary Installation

Earth work in excavation by mechanical means (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, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m. All kinds of soil

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. All kinds of soil

Supplying and filling in plinth, under floor, foundations etc. with sand (fine) from local quarry with all lifts including spreading in horizontal layers, watering, grading to required slope, ramming, consolidating and compacting each layer by using plate compactor or by any suitable method complete.

Supplying chemical emulsion in sealed containers including delivery as specified. Chlorpyriphos/Lindane emulsifiable concentrate of 20%

Along the external wall below concrete or masonry apron using chemical emulsion @ 2.25 litres per linear metre including drilling and plugging holes etc. With Chlorpyriphos/Lindane E.C. 20% with 1% concentration.

Treatment of soil under plinth filling using chemical emulsion @ one litre per hole, 300 mm apart including drilling 12 mm diameter holes and plugging with sand filling: With Chlorpyriphos/Lindane E.C. 20% with 1% concentration.

1:4:8 ( 1 Cement: 4 fine sand : 8 graded stone aggregate 40 mm nominal size)

1:3:6 ( 1 Cement: 3 fine sand : 6 graded stone aggregate 20 mm nominal size)