Construction of a new playground

Earthwork excavation in foundation for footings of concrete pedestals (28 Nos having dimensions of 0.60 m × 0.60 m × 0.90 m) and retaining walls (having width of 0.45 m and depth of 0.60 m on the perimeter of the proposed playground, in all kinds of soil including disintegrated rocks / soling / pebbles, including dressing of sides, ramming of bottom and shifting and re-filling the excavated earth on the sides of the footings / foundations / inside the retaining walls etc., complete: Earthwork excavation in all kinds of soil including Moorrum, rubbles, boulders etc., up to a depth of 0.90 m below ground level, for making 28 Nos foundation pits of size 0.60 m × 0.60 m x 0.90 below ground level, along the perimeter of the playground at a spacing of 5.00 m c/c, manually or using mechanical excavators (JCBs / Poclains as per requirements at site), including dressing of the sides, ramming of the bottom, necessary shoring, strutting, dewatering etc., if required as per site conditions, stacking the excavated materials at location(s) shown by the Bank's Engineer in the vicinity, within 50 m in the colony premises, from the periphery of the pits, refilling the excavated earth including all leads & lifts etc., as directed by the Bank's Engineer.

Providing and laying Plain Cement Concrete (P.C.C) of M-10 grade (1:4:8), for a compacted thickness of 15 Cm, in the foundation pits for footings of concrete pedestals having dimensions 0.60 m × 0.60 m and foundation trenches of retaining walls having width of 0.45 m, including centering, shuttering, compacting and curing, complete: Providing, hand batching, mixing by hand / manually operated / mechanical mixers, laying, spreading, levelling and compacting using hand rammers / mechanical vibrators / rammers, P.C.C. 1:4:8 (1 cement : 4 coarse sand : 8 graded stone aggregate 40 mm nominal size), using approved make portland cement, 40 mm and down size graded hard stone coarse aggregates and coarse sand etc., all of approved quality, for a compacted thickness of 0.15 m, including necessary shuttering, curing etc., as levelling course / bedding in the foundation pits / trenches, excavated as per item No. 1 above, all as directed by the Bank's Engineer.

Providing and laying Plain Cement Concrete of M-20 grade (nominal mix 1:1.5:3) in footings of concrete pedestals having dimensions of 0.60 m × 0.60 m × 0.75 m and concrete pedestals having dimensions of 0.23 x 0.23 x 0.75 m encasing the M.S posts, including centering, shuttering, compacting and curing, complete: Providing, hand batching, mixing by hand / manually operated / mechanical mixers, laying in layers and compacting using needle vibrators / hand rammers, plain cement concrete 1:1.5:3 (1 cement : 1.5 coarse sand : 3 graded stone aggregate 20 mm nominal size), made using approved make portland cement and approved quality coarse sand & graded hard stone aggregates, in footings of concrete pedestals having dimensions of 0.60 m × 0.60 m × 0.75 m and concrete pedestals having dimensions of 0.23 x 0.23 x 0.75 m encasing the M.S posts, including necessary formwork / shuttering, proper curing, disposing and carting away the debris from the colony premises etc., complete as directed by the Bank's Engineer.

Providing, cutting, straightening, bending, tying and placing in position 10 mm diameter, Fe-550 D grade TMT bars as reinforcements to the R.C.C cricket pitch: Providing, cutting, straightening, bending, tying using 18 SWG G.I binding wires and placing in position reinforcement mesh using 10 mm diameter ISI marked Fe-550 D grade TMT bars of approved make at a spacing of 150 mm c/c both ways, cut to the required lengths, straightening, bending and ensuring proper cover of not less than 50 mm to the reinforcement by providing and fixing by tying P.C.C cover blocks having grooves, to the reinforcement bars at a spacing not exceeding 600 mm c/c etc., complete as directed by the Bank’s Engineer, as reinforcement for the R.C.C cricket pitch. The rate shall include cost of G. I. binding wire and wastages. Authorized laps shall be measured and paid for. The rate shall include thoroughly cleaning and watering of the surface of the sub-base filling, over which the reinforcement mesh is to be placed, using wire brush / brooms, etc., before placing the rebar mesh in position.

Providing and constructing brickwork in cement mortar 1:6 (1 cement: 6 coarse sand) with kiln-burnt bricks of class designation 7.5, in full-brick-thick (0.23 m) for peripheral retaining walls having 1.20 m height (0.45 m below existing ground level + 0.75 m above existing ground level), over P.C.C. bed in trenches: Providing and constructing 230 mm (full-brick) thick brickwork in cement mortar 1:6 using common burnt clay F.P.S. (non-modular) bricks of class designation 7.5, in cement mortar 1:6 (1 cement : 6 coarse sand), made by hand batching & mixing by hand or mechanical mixers, using approved quality coarse sand and approved make portland cement, as retaining walls between the concrete pedestals along the periphery of the playground having, 1.10 m height (0.45 m below existing ground level + 0.75 m above existing ground level, over the P.C.C. bed laid as per item No. 2 & 3 above, including, curing, raking out the joints, cleaning, disposing and carting away the debris from the colony premises etc., complete as directed by the Bank's Engineer.

Providing and rendering cement plaster in C.M 1:4 (sand-cast finish) on the surfaces of the brick masonry retaining walls / concrete pedestals on the periphery of the playground: Preparing the exposed surfaces of the brick masonry retaining walls and concrete pedestals, constructed as per item No. 3 & 4 above by raking up and removing the loose mortar / concrete on the walls / R.C.C members, wetting with good quality water, providing and rendering cement plaster with cement mortar - CM 1:4, prepared by hand batching and mixing, using approved quality river sand and approved make Portland Cement, in line, level and plumb to get sand cast finish, for an average thickness of up to 20 mm. Necessary curing, cleaning, disposing the dust / debris generated from the work and carting away the same from the Banks premises, cleaning of the surfaces stained / affected during execution of the item etc., are also included in the scope of the work.

Earthwork in filling using selected earth / Moorrum / Khopra for forming the glacis (embankment) along the outer periphery of the retaining walls, 0.60 m high at 1:2 (V:H) slope (Cross-sectional area of triangular shaped glacis (embankment) having cross sectional area of 0.36 Sqm), including wrapping around the four corners, spreading, dressing to profile, watering, compacting etc. complete: Supplying, shifting, laying, levelling / forming glacis (embankment) on the outer periphery of the retaining walls on the periphery of the playground, including wrapping around the four corners, by depositing, spreading and compacting earth in multiple layers of thickness not exceeding 0.15 m each, including breaking of clods, watering and compacting each layer using water, crowbars, hand rammers etc., and dressing the sloping face neatly to the required profile of 0.60 m height at 1:2 (vertical : horizontal) slope, including all leads & lifts etc., complete as directed by the Bank's Engineer.

Providing and laying sub-surface drainage system using 100 mm diameter perforated P.V.C. pipes in herringbone pattern within the Moorrum sub-base, wrapped in geotextile filter fabric and surrounded by graded gravel, leading to the disposal point(s), including excavation, laying, jointing and connections, complete: Providing, cutting to the required lengths and laying approved quality & make, 100 mm diameter perforated rigid (Unplasticised) P.V.C. pipes, including necessary fittings / specials, in herringbone pattern within the sub-base earth / Moorrum filling inside the retaining walls on the periphery of the playground, each pipe wrapped all-round with approved quality non-woven geotextile filter fabric, laid to proper and sufficient gradient towards the disposal point, including excavation of trenches having average cross-sectional dimensions on 300 mm x 300 mm in the sub-base, jointing with approved make fittings / specials, filling approved quality gravel around the outer periphery of the pipes for a thickness of not less than 75 mm and remaining portion of the trenches with the excavated earth after laying of the pipes, including watering and compacting the same, disposing the surplus earth, making the connections, testing the joints & gradient, making good the surface of the earth filling etc., complete as directed by the Bank's Engineer.

Providing, cutting and fixing 8 mm thick M.S. base plates having dimensions of 300 mm x 300 mm at bottom (28 Nos.), end plates having dimensions of 110 mm x 110 mm at top (28 Nos.) and lap plates having 90 mm x 300 mm at the joints (4 Nos for each joint, i.e. total 112 Nos) and 50 mm x 50 mm x 5 mm Mild Steel (M.S) equal angles for a length of 50 mm as cleats (232 Nos.), welded to the M.S posts: Providing, machine cutting to the required sizes and fixing approved quality and make (Tata, SAIL, Jindal, JSW, VIZAG or approved equivalent) Mild Steel (M.S) plates having 8 mm thickness, as base plates, top end plate and lap plates (01 No. of 300 mm x 300 mm base plate for each vertical post, 01 No. of 110 mm x 110 mm top end plate for each vertical post and 4 Nos. of 90 mm x 300 mm for lap plates for each joint of the post) to the bottom / top ends and vertical sides at the joints of the Mild Steel (M.S) hollow-section posts to be erected as per item No. 9 below and 50 mm x 50 mm x 5 mm Mild Steel (M.S) equal angles for a length of 50 mm as cleats at each joint between the horizontal bracings / trusses and vertical posts, by electric arc run-welding at each joints / edges using approved quality and make welding electrodes, the base plates being embedded / encased in the M-20 foundation concrete to be laid as per item No. 3 above, including grinding & finishing the edges & welds, providing and applying a priming coat of approved make Zinc Chromate primer after preparing the surfaces by removal of the mill / weld scales, oil & grease and any other foreign matter, filling and levelling of the joints with approved quality and make metal putty etc., complete as directed by the Bank's Engineer. The quantity shall be arrived at measuring the actual sizes and the actual or theoretical sectional weights, whichever is less. No wastages shall be considered while arriving at the quantities.

Providing, fabricating and erecting structural steel supporting framework using Mild Steel (M.S) square hollow section having cross-sectional dimensions of 100 mm × 100 mm × 4 mm @ 11.73 Kg / m for posts (28 Nos.) at 5.00 m c/c along the periphery of the playground - height 8.00 m above finished top level of the retaining walls and 80 mm × 40 mm × 2.9 mm @ 5.03 Kg / m as horizontal bracings between M.S posts at 4 levels (top, bottom and 2 intermediate), along the periphery of the playground including cutting, straightening, fabrication by electric arc welding, hoisting, fixing in position and a coat of primer etc., complete: Providing, machine cutting to the required sizes, straightening, fabricating, hoisting and erecting hollow Electric Resistance Welded (ERW) Mild Steel (M.S) square / rectangular tubular sections, of approved make (APL Apollo, JSW, Jindal, Tata, SAIL or approved equivalent) - square sections having cross-sectional dimensions of 100 mm × 100 mm × 4 mm @ 11.73 Kg / m for vertical posts (28 Nos.), each having 9.50 m height (8.00 m above the finished top level of the retaining walls + 0.60 m through the concrete pedestal + 0.75 m embedded in the concrete footing) at 5.00 m c/c along the periphery of the playground and rectangular sections having cross-sectional dimensions of 80 mm × 40 mm × 2.9 mm @ 5.03 Kg / m as horizontal bracings between M.S posts at 4 levels (top, bottom and 2 intermediate), along the periphery of the playground, fabricated by electric arc run-welding using approved quality and make welding electrodes at joints, the open top ends closed by providing and welding M.S. plates / sheets of 4 mm thickness, machine cut to the size of the open ends. The rate shall include the cost of all materials including wastages, labour, transport, cost of plants & machines including hoists, providing and erecting necessary scaffolding & staging required for safely working at height including dismantling, removing and taking away the same after successful completion of the work, thoroughly cleaning the spilled paint / stains etc., complete and providing and applying a priming coat of approved make Zinc Chromate primer, after preparing the exposed surfaces by removal of the mill / weld scales / extra weld, oil & grease and any other foreign matter, filling and levelling of the joints with approved quality and make metal putty etc., complete as directed by the Bank's Engineer. The quantity shall be arrived at measuring the actual sizes and the actual or theoretical sectional weights, whichever is less. No wastages shall be considered while arriving at the quantities.