Public Works Department Tender

Construction of circular manholes in brick masonry with Country Bricks of calss designation 35 in circular manholes, providing and laying 200mm thick of cement concrete 1:4:8 (one cement, four coarse sand and eight hard broken granite stone aggregate of 40mm nominal size), side walls with country bricks in cement mortar 1:4 (Ione cement and four sand) as shown in drawings,. Cement plastering with inside and outside walls in CM 1:3 (one cement and three fine sand ) with 20mm thick using Sulphur Resistants Portland Cement (SRPC), providing, benching and channeling with CC 1:1 ½:3 (one cement, one and half sand and three hard broken granite stone aggregate of 20mm nominal size), finishing bottom 20mm thick cement plaster in C.M. 1:3 (one cement and three fine sand) with neat cement using SRPC cement, providing and fixing of 560mm dia Heavy duty SFRC covoers with frame made as per IS 12592-2002 (I & ii) in accordance with “CPHEEO Manual on Sewerage and Sewage tratement and relevant IS Codes”. Fixing of C.I./PVC steps as shown in drawsings, but excluding its cost which will be paid separately. The cost also includes the cost of curing and testing of the manholes for its water tightness. A drop in water more than 5 cm in 24 hours shall not be permitted. The rate including cost of circular SFRC cover and frame 560mm dia, but excluding the cost of earth work excavation – 1200mm dia and 1000mm deep.

Extra / rebate for everyt additional / reduction in depth of 0.10 m in 23cm thick wall or part thereof over the following mamhole size for circular manhole – country bricks – m1200mm dia and 1000mm deep.

Fixing of 150mm wide PVC encapsulated steps in the manjoles with 200 x 200 x 100mm CC block in cement concrete 1:1.5:3 (one cement one and half sand and three hard broken granite stone aggregate of 20mm nominal size) all as shown in drawings

Earth work excavation above water level and depositing on bank in sandy, silt or other soil, wet sand or silt, light black cotton soil or clay, sandy loam and ordinary soil for infiltration, gallery siphon or connecting pipe line including driving shoring materials as mentioned below. Removing the shoring materials and refilling with excavated earth complying with standard specification etc., complete. - First depth of 2m (using close timbering)

Providing, laying and jointing HDPE pipe PE 80 x PN 2.5 conforming to IS specification and ISI marked including transportation to the site, lowering to the trenches, laying to proper grade and alignment, testing of joints with required testing equipment, including jointing and excluding specials such as bends, tees, threaded pieces, couplers, reducer, endcaps etc., complete as pe IS and CPWD specification – 200mm dia

Making connection of drain or sewer line with existing manhole including breaking into and making good the walls, floors with cement concrete 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 40 mm nominal size) cement plastered on both sides with cement mortar 1:3 (1 cement : 3 coarse sand) finished with a floating coat of neat cement and making necessary channels for the drain etc. complete. - for pipes 100 to 230 mm diameter.

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means in foundation trenches or drains (not exceeding 1.5m in width or 10 sqm on plan) including dressing of sides and ramming of bottoms , lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soil as directed , within a lead of 50m -All kinds of soil.

Cleaning the site by removing the slushy soil on both the sides of road and making the road fit for laying WBM and making smooth surface for vehicular traffic including disposing the same within 2 Km lead.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering.- All work upto plinth level -1:5:10 (1 cement:5coarse sand : 10 graded stone aggregate 40mm nominal size)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering.- All work upto plinth level -1:2:4 (1 cement:2coarse sand : 4 graded stone aggregate 20mm nominal size)