C/o Office Building (Proposal for Retrofitting of Office Building Sector-96), Noida

Scaffolding: Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven story height made with 40 mm dia M.S. tube 1.5 m centre to centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challis, M.S. clamps and M.S. staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc. wherever required 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 .The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding. Note: - This item to be used for maintenance work judicially, necessary deduction for scaffolding in the existing item to be done.

Surface Preparation: All sharp fins, protrusions, surface irregularities and unevenness shall be ground to a smooth surface with less than 1/32 inch in deviation. All surface voids and undulations must be filed before wrapping process using Repair Mortar as per required thickness. All surface preparation shall be completed as per the manufacturer or engineer in charge recommendation.

Application of Impregnating Resin on Concrete: Providing and applying Epoxy resin as a Primer at an average consumtption of 0.15 Kg/ Sqm on the prepared concrete as per the manufacturer recommendation. The epoxy shall have below properties : Viscosity of Part A = 4000-10000 Cps at 25 degree C & of Part A = 500-1000 Cps at 25 degree C Mixed density = 1.05 - 1.15 g/cm3 Compressive Strength @ 250 C (As per ASTM C 579-01) 7 Days > 50 MPa Tensile Strength @ 250 C (As per ASTM D638) 7 Days > 40 MPa Flexural Strength @ 250 C (As per ASTM D790) 7 Days > 60 MPa Bond Strength @ 250 C > 1.5 MPa (Concrete Failure) & > 8 MPa ( Steel Failure)

Strengthening with application of Carbon fabric of 600 GSM : Applying Unidirectional Carbon fabric of 600 GSM in single layer over RCC member with wet application process as per specification. Carbon fabric of 600 GSM shall be completely wet with impregnating epoxy resin in 2 layers at an average consumption of 0.7 Kg/ Sqm. Wrapping the CFRP fabric to RCC member at desired orientation using tamping rollers to avoid any air voids etc. Applying additional coat of impregnating epoxy resin and sprinkling sand (in last layer only) over it as per direction and satisfaction of Engineer-in-charge. CFRP product shall have following minimum specifiations: Tensile strength of Fiber > 4900 MPa Tensile E – modulus of Fiber > 230 GPa Fiber Density = 1.8 g/cm3 Elongation at break > 2.1% Dry Fabric thickness = 0.33 mm Tensile strength of Fiber (As Per ASTM D3039) > 1100 MPa Tensile E – modulus of Composite Laminate (As Per ASTM D3039) > 75 GPa Composite Laminate thickness = 1.00 mm (Mode of measurement shall be per sqm carbon fiber sheet consumed not surface area of application) Applying quartz sand onto the CFRP system. The resin should be in a tacky state during the application of the sand. Deisign and Sample testing from reputed laboratory is included in the scope

Plaster: Supply and apply 12 mm thick site-mixed cement plaster (in Coarse sand) of mix 1:4 (1 cement: 4 coarse sand) after applying the quartz sand.

Bond Coat: Providing & applying One coat of structural grade epoxy bond coat by brush conforming to ASTM-C-882-87 to the prepared concrete surface to be repaired / strengthened. This is applied prior to the application of polymer repair mortar / epoxy mortar / Microconcrete to have monolithic action between old concrete surface and new concrete surface.

Shear Connectors: Make 20 mm dia holes using heavy duty electrically operated hammer drills in the concrete of RCC members to a depth of about 75 mm at 400 mm c/c or at suitable grid in zig-zag fashion,clean the holes using air jet and fix pre- fabricated 235 x 50 mm L-shape 16 mm dia rebar using Anti Corrosive protective coating so that 75 mm out of 235 mm is inserted inside the concrete and 85 mm remain outside along with 50 mm bend. The shear connectors are used to tie the additional reinforcement bars.

Shear Connectors: Make 20 mm dia holes using heavy duty electrically operated hammer drills in the concrete of RCC members to a depth of about 75 mm at 350 mm c/c or at suitable grid in zig-zag fashion,clean the holes using air jet and fix pre- fabricated 115 x 50 mm L-shape 16 mm dia rebar using Anti Corrosive protective coating so that 75 mm out of 115 mm is inserted inside the concrete and 40 mm remain outside along with 50 mm bend. The shear connectors are used to tie the additional reinforcement bars.

Repair and Rehabilitation Items: Drilling suitable holes in reinforced or plain cement concrete with power driven drill machine to a minimum depth of 100mm upto 200mm in RCC beams, lintels, columns and slabs to introduce steel bars for sunshades/balconies including fixing the steel bars in position using epoxy resin anchor grout of approved make but excluding the cost of reinforcement, all complete as per direction of Engineer-In-Charge. Upto and including 12mm dia

Reinforcement Steel: Providing and fixing in position steel bars reinforcement of various diameters for RCC pile, pile caps, footing, raft, retaining wall, shear wall, lift wall, foundations, slabs, beams, columns, canopies, staircases, newels, chajja’s, lintels, pardies, coping, fins, arches etc. as per detailed design, drawings and bar bending schedules, including straightening, cutting, bending hooking the bars, binding with wires or tack welding, supporting as required etc. all complete at all levels. Thermo-Mechanically Treated steel bars. (Fe 500 D)