Civil works Maintenance of Narela LIG G2 Flats (HS 2017).

Providing and fixing double scaffolding system (cup lock type) on the exterior side of building/structure, upto 25 metre height, above ground level, including additional rows of scaffolding in stepped manner as per requirement of site, made with 40 mm dia M.S. tube, placed 1.5 metre centre to centre, horizontal & vertical tubes joint with cup & lock system with M.S. Tubes, M.S. tube challis, M.S. clamps and staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for execution of work of cleaning and/ or pointing and/ or applying chemical and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connecting with the building etc, wherever required, if feasible, for inspection of work at required locations with essential safety features for the workmen etc., complete as per directions and approval of Engineer-in-charge. Note:- (1) The elevational area of the scaffolding shall be measured for payment purpose. (2) The payment will be made once only for execution of all items for such works.

Providing and fixing Scaffolding net of required width made of high density Polyethylene UV stabilized knitted on warp knitting machines having density 100 gram / sqm and shading coefficient minimum 75% around the construction site/ for vertical extension as per requirement including fastening/tying with building/scaffolding pipes or with any other fixtures etc. complete as per direction of Engineer-in-Charge. (One time payment shall be made for providing Scaffolding net from start of work till completion of work including shifting if any. The Scaffolding net shall be the property of the contractor on completion of the work)

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge a)50mm average thickness

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge A 25mm average thickness

Cleaning of reinforcement from rust from the reinforcing bars to give it a total rust free steel surface by using alkaline chemical rust remover of approved make with paint brush and removing loose particles after 24 hours of its application with wire brush and thoroughly washing with water and allowing it to dry, all complete as per direction of Engineer-In-Charge. (a ) Bars upto 12mm diameter

Providing, mixing and applying over reinforcement bars zinc anti-rust agent of make Fosroc/sika frizincr or equivalent as per specification and direction of Engineer-in-charge (Dosage/coverage as per the recommendation of the manufacturer. (Surface area of the chipped portion where reinforcement is exposed shall be measured for payment)

Centering and shuttering including strutting, propping etc. and removal of form for: a) Columns, Pillars, Piers, Abutments, Posts and Struts

Providing and placing in position Micro-concrete, which shall be cement based prepacked single component, chloride free, non-shrink, free flow, self compacting, ready to use after mixing water in specified proportion obtained from approved manufacturer as per specification and direction of Engineer-in-charge. (payment under this item shall be made only after proper wet curing has been done and surface has been satisfactorily evaluated by sounding/tapping with a blunt metal instrument) Grade M25 as per direction of engineer-in- charge. (Micro concrete used to have a minimum solid polymer content of 6% by weight of cement for all hights) Readymade Micro-concrete.

Supplying and applying non-metallic composite Carbon fiber wrapping system Tyfo SCH14UP, BASF, SIKA, Krishna Conchem comprising of unidirectional fiber sheet 400 GSM (having dry fibre properties, modulus of elasticity not less than 240 GPa, tensile strength not less then 4800 MPa and density not less than 1.80 gm/cm3) and compatible saturant, including surface preparation by Grinding /moulding concrete, cleaning it with wire brush, removing oil, laitance etc.if present, rounding sharp edges to min 25mm. radius etc. complete, Profiling by applying compatible primer on prepared surface, filling the holes and uneven surfaces with thixotrophic putty etc. complete, wrapping the fiber sheet by tamping to avoid any air voids etc. i/c fixing with a required number of fiber anchors of minimum 10 mm diameter along the length of girder (both side) as per the drawing, driving and fixing the same upto minimum 75mm into parent concrete. Complete with respect to driving holes, cleaning with pressure air, and making them free of dust and dirt, fiber sheet reinforcement shall be saturated by not less then 1.25 kg/sqm of saturating resin. The same procedure shall be adopted for multiple layers with interval of 8 hrs between consecutive layers, rectifying air voids if any, pasting the river sand on it to make the surface rough to add any further finishes as per the specifications, design, and drawings and the direction of the Engineer-in-charge.

Providing shear anchor of 10mm dia and 100mm long of high strength hybrid woven fiber glass fabric mesh with filling of hole with TYFO EPOXY/NCase,BASF, SIKA, Krishna Conchem or equivalent removing/drawing out of the entrapped air etc. from the drilled hole all complete as per manufacturer's specifications and directions of the Engineer in Charge. It shall include labor for mixing EPOXY resin, saturating the anchor with EPOXY, drilling the RCC members and inserting the saturated anchor inside thedrilled hole.