Waterproofing of prefabricated roof using reinforced Thermoplastic Polyolefin membrane at Reactor Building and Turbine Building of TAPS, 1and2 Plant Site.

Amount

Terrace Reach Providing, Erecting & commissioning single mast single cage passenger and material hoist of capacity upto 1.0Ton Including all safety related appurtenances like load cell, overload indicator, mechanical locking, regulatory compliances, load testing and third party certification. The man-material hoist shall be from trusted and certified source complying all safety and regulatory requirements. The foundation shall be limited to a plan area of 3.0m x 3.5m and constructed wherever required, as per manufacturer's specifications. The hoist shall be installed for entire course of work and upto work completion. The work is to be carried out in series i.e one building at a time. Post work completion the hoist shall be safely removed as per manufacture's specifications.

For Reactor Building. Maximum Height reach of 55m

For Turbine Building. Maximum Height reach of 35m

Removal of Existing Waterproofing System Lead & lift charges for removing existing membrane type waterproofing systems viz APP membrane waterproofing / EPDM waterproofing with Geotextile layers, upto firm base in proper shape and size including removal of surcharge weights 35mm thick concrete paver blocks, aluminum end strips, etc and safe disposal at designated location as directed by Engineer-in-charge.

Surface Preparation: Providing and applying polymer modified dual shrinkage compensated mortar leveling layer to form adequate slope and filling all cracks, crevices and undulations if any including curing, leveling, smoothening and making substrate free from debris and any other irregularities which may puncture and damage the waterproofing membrane, etc. Complete as per technical specifications and as directed by Engineer-in-charge.

Removing, shifting and reinstating modular railing structure for surface preparation and waterproofing of parapet structure, parapet-slab interface, drains, etc along the edge of structure. The railing structure shall be used for anchoring safety appurtenances during execution of work. Post completion of edge / parapet and allied waterproofing works the railing shall be re-erected in place. (The details of railing structure is enclosed in technical specification)

Providing and fixing 300GSM, non-woven geotextile membrane resistant to micro-organisms, and manufactured using 100% pure polypropylene yarns. The geotextile layer shall be laid on the substrate ensuring no gaps in the geotextile. The geotextile should be checked prior to the application of the waterproofing membrane ensuring the uniformity of the substructure in order to avoid faults, irremovable debris or other roughness in the underlying layer which may cause damage, perforate or punch, the subsequent waterproof layer

Insulation course: Providing and installing extruded polystyrene (XPS) insulation board of high density and R-value (m²*K/W) greater than 2.1 as per ECBC code. The XPS board shall be of closed cell structure and shall not swell, shrink or absorb water. The thickness of board shall be as per manufacturer's specification and test report for corresponding R-value. The XPS boards shall be placed cut to size as per field requirement accommodating for drains, corners and other installations. The boards shall be connected with each other using butyl sealing tape.

Waterproofing course: Supply and Application of flexible Thermoplastic Polyolefin (TPO) Membrane having minimum thickness of 1.5 mm with Reinforced Fabric (RF) / scrim; which shall be free from plasticizer, chlorine & phthalate and should meet the specifications as per ASTM D6878 (EN13956 for European makes) and is manufactured using a hot-melt extrusion process for complete scrim (reinforcing fabric) encapsulation.The rate shall include TPO membrane rolls, TPO drain accessories, preformed edge and corner accessories with PU/epoxy/Hybrid sealant, high performance hydrophilic adhesive with good adhesion and water repellent property and suitable Stainless Steel / Aluminium / electroplated fasteners with plate washers of adequate size with PU/Hybrid Sealant/putty detailing. Membrane is to be rolled over the adhesive while its still wet or in tacky condition. Membrane Laps should be welded properly to maintain the seemless waterproofing application by using appropriate hand held or automatic welding machines.The welding shall be either single seam or double seam as per field condition. The fasteners / screws shall be covered under the overlaps. The whole treated terrace / area shall be flooded with water for a minimum period of 24 hours to test against leakage/seepage including sealing of drains for the purpose of test. (Technical specification shall be referred for detailing of corners and drains) Cost of thermal insulation, Geotextile moisture separation layer and end detailing using aluminum angle and SS concrete fasteners shall be paid under relevant items. Note: Refer Technical specification for details.

For Roofs and Adjacent parapet structures (As per Technical Specifications)

Termination Detailing Providing and fixing structural / industrial aluminium sections at the terminated ends of waterproofing membrane at top of parapet / at termination of expansion joints to secure membrane sheets against blowing using stainless steel chemical fasteners of required size and make including joint and gap sealing with PU Sealant/ Polysulphide sealant (or equivalent) as approved and directed by Engineer-In-Charge

Lead & lift charges for reinstating surcharge weights of 35mm thick concrete paver blocks over the entire area above the installed membrane layer to protect the membrane from dislodging as directed by Engineer-in-charge.

Expansion Joint Providing and fixing rope suspended platfrom of 250kg capacity with dual parapet anchor support and designed base for counterweight load distribustion over prefabricated roof including all safety measures as per manufacturer's issued guidelines and as directed by Engineer-in-charge. The suspended platform shall be included with all required appurtenance for safe execution of work. The platfrom shall be workable for a maximum height of 40m. The platform shall be installed and removed twice for treating both side (East & West) expansion joint. The item shall be measured as per maximum height covered under each installation. Repair of expansion joint shall be paid under relevant items

East side installation Maximum Height 20m

West side installation Maximum Height 35m

Providing and Fixing 30-40mm thick Polyurethane / LDPE EPE foam Backer Rod in the expansion joint 25mm beneath the top concrete surface and sealing in position using PU sealant (Gun grade or Pour grade as per field requirement) or any other compatible material as specified by manufacturer of TPE tape and as directed by Engineer in charge including removal of existing joint filler upto required depth and cleaning / grinding of adjacent concrete top surface for adhesion of TPE tape. Note: Backer rod shall be 3-5mm greater than the width of groove. Baker rod should be placed 10-15mm below the finished concrete surface and sealant shall be flushed finished with the top of concrete surface. Note: In case, groove / expansion joint width is greater than the specified, Contractor shall install wider baker rod at no extra cost.

Providing and fixing reinforced TPE tape of required width using two-component, low viscosity, thixotropic epoxy adhesive compatible with tape material including surface grinding and smoothening for paint and surface undulations removal, cleaning of dust, joint sealing with aluminium section and polysulphide etc. Complete. The tape shall be measured for the actual length of expansion joint treated. (Aluminium sections shall be paid under relevant item)

Turbine building Vertical expansion Joint. Width 150mm minimum

Floor - wall expansion joint. Width 300mm minimum

Supplying and Installing Moisture resistant board base of Cement/Gypsum/wood (HDHMR) with a moisture content less than 10% as an overlay for protection of insulation board and to provide a hard surface for terrace accessibility. Physical Propoerties required: 1) Thickness: 9 - 12.5mm. (depending upon base material) 2) Density: 800-1450kg/m³ (depending upon base material) 3) Moisture absorption: <30% ( After 24 Hr submergence) 4) Modulus of Rupture: >10MPa

APPLICABLE TOTAL GST RATE (%) INCLUDED IN THE QUOTED PRICE:

CGST RATE(%)

SGST RATE(%)

IGST RATE(%)

SHIVKRUPA ENTERPRISES (BID ID -895249)

MICRO LEAKAGE CARE PRIVATE LIMITED (BID ID -893233)