SPECIAL REPAIRS TO ROOF TREATMENT AT FOUR BUILDINGS NAMELY P-65, P-65A (DOLP), P-163 AND 163A (DIRECTOR BLDG) AT TECHNICAL AREA OF DRDL HYDERABAD

Amount

Dismantling tile work in roofs laid in cement mortar including stacking material within 50 metres lead for thickness of tiles 10 mm to 25 mm complete all as specified and as directed by Engi-in-charge.

Demolishing mud phuska in terracing and disposal of material within 50 metres lead complete all as specified and as directed by Engi-in-charge.

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge.

Cutting /removing of plants and grass growth on bldg's roofs, chajjas and edges on bldgs,work shop, hangers (at any floor and any height) including spreading chemical at plant roots area and finished the damaged area with PCC 1:2:4/ Cement plaster in CM 1:4 as required and remove the wast to distance n exc 50m, complete all as specified and directed by Engineer-in-Charge.

Disconnecting damaged overhead/terrace PVC water storage tank of any size from water supply line and removing from the terrace including shifting at ground level as per direction of Engineer-in-charge.

Dismantling G.I. pipes 15 to 25mm (external work) including excavation and refilling trenches after taking out the pipes, manually/ by mechanical means including stacking of pipes within 50 metres lead as per direction of Engineer-in-charge

M&L Grading roof for water proofing treatment with cement concrete 1:2:4 (1 cement : 2 coarse sand :4 graded stone aggregate 20mm nominal size) complete all as specified and as directed.

M&L 15 mm thick cement plaster on roof of mix : 1:4 (1 cement: 4 fine sand) complete all as specified and as directed.

M&L for repairing the edge/corner of chajja/roof projection and similar work by removing of plastered width/girth exceeding 15cm & n.exc 30cm and making good with 15cm rendering in cement mortar 1:3 including mixiing 301 pidicrete URP of Dr Fixit to match with including chicken wiremesh netting on exisiting surfaces including necessary form work complete all as specified.

Waterproofing for terrace: (i) Cleaning the surface areas thoroughly so that they are free of all contaminants like dirt and laitance damp; to remove all the loose materials by various mechanical means. Removal of all surface Imperfections, protrusions, loose concrete damp; filling of cracks using Seal PU or Polymer Modified Mortar in the ratio Seal Crete : Cement : Sand (1:2:5). (ii) Providing and making vata at the junction of the walls and the slabs using PMC mortar in the ratio of Seal Crete : Cement : Sand (1:2:5 ) using SBR Latex as the bond coat. (iii) Correct all construction joints by grouting wth grout IP at 1m apart and opening of joints in "V" cut groove and fill with PMC mortar, using SBR Latex as the bond coat. (vi) Providing and applying brush applied water based PU dispersed polymer modified Elastomeric liquid membrane, Urethane BTD with Zero VOC to form the membrane in situ at site with 3 layers of monolithic, seam less finish having > 500% elongation The first layer is to be apply primer @ 200 Gms per Sqm and shall act as the prime coat to fill in the cavities. This can be brush or roller applied. For spray application, using any airless spray system with recommended nozzle size at 30:1 at 2 bar pressure. (v) Providing and applying the second coat @ 1 kg per Sqm using the soft brush, roller or Spray system with the recommended nozzle size on to the primed surface. Providing and applying 45 Gsm Fiber cloth over the 1 st coat,when substrate till the coat is tacky Providing and applying 3 rd coat @ 1 kg per Sqm to finish the application for a thickness of 1.5 mm membrane formed in place. The second coat should be applied perpendicular to the first coat for cross linkage and complete as per the specification. (vi) Top Screed modified with Integral Waterproofing Chemical: Placing a seperation layer of 120 GSM geotextile fabric over the waterproofing membrane and carrying out sloping screed on top of it over the with cement modified @ 0.4% with Manufacturer plast LW+ for waterproofing. Make: - Bostik, Berger, Fosroc, Sika, Asian or any other make approved by E-in-C’s Branch for PU based water proofing treatment.

M&L plain cement concrete tiles 20-22 mm thick in Roof, jointed with neat cement slurry mixed with pigment to match the shade of tiles, including rubbing and cleaning etc. complete, on 20 mm thick bed of cement mortar 1:4 (1 cement: 4 coarse sand) complete all as specified and as directed.

All as per item No.11 above but refixing only.

Providing and fixing 15 mm dia nominal bore G.I. Pipes complete with G.I. fittings and clamps, i/c making good the walls etc. concealed pipe, including painting with anti corrosive bitumastic paint, cutting chases and making good the wall :

Providing and fixing 20 mm dia nominal bore G.I. Pipes complete with G.I. fittings and clamps, i/c making good the walls etc. concealed pipe, including painting with anti corrosive bitumastic paint, cutting chases and making good the wall :

Providing and fixing 25 mm dia nominal bore G.I. Pipes complete with G.I. fittings and clamps, i/c making good the walls etc. concealed pipe, including painting with anti corrosive bitumastic paint, cutting chases and making good the wall :

Providing and placing on terrace (at all floor levels) polyethylene triple layered water storage tank, IS : 12701 marked, with cover and suitable locking arrangement and making necessary holes for inlet, outlet and overflow pipes but without fittings and the base support for tank complete all as specified and as directed.

Providing and fixing 20 mm nominal bore, 120 mm long, weighing not less than 198 gms PTMT Ball cock of approved quality, colour and make complete with Epoxy coated aluminium rod with L.P./ H.P.H.D. plastic ball complete all as specified and as directed.

Providing and fixing 20 mm nominal bore gun metal gate valve with C.I. wheel of approved quality (screwed end)

Dismantling of 150mm dia PVC rain water pipe with fittings and clamps including stacking the material within 50 metres lead.

S & F PVC (SWR) pipes 160mm bore, single socketed in any length with rubber ring joints fixed to wall or laid in floors including taking down old pipe complete all as directed.

S&F 160mm PVC (SWR )bends with access door of any radius all as specified & directed.

M&L Brick work with clay flyash F.P.S. (non modular) brick of class designation 7.5 in superstructure above plinth level up to floor five level in Cement mortar 1:6 (1 cement : 6 coarse sand) incl demolition of old bricks all as specified & directed.

M&L Half brick masonry with common burnt clay F.P.S. (non modular) bricks of class designation 7.5 in foundations and plinth in cement mortar 1:4 (1 cement : 4 coarse sand) incl demolition of old bricks all as specified & directed.

M&L for preparation of new plastered surfaces and applying two coats of weather proof antifungal exterior paint as per manufacturers instructions over a coat of true care exterior wall primer over two coats of external birla putty 1.5mm each to level the surface and finshied smooth with emery paper No.180 followed by emeny paper No.320 or 400 and wipe it clean complete all as specified and as directed . Make:- APEX ULTIMA of ASIAN PAINT/ WEATHER COAT SMOOTH (BERGER PAINTS)/ WEATHER SHIELD MAX EXTERIOR ACRYLIC (DULUX)

M&L 12 mm cement plaster finished with a floating coat of neat cement of mix : 1:6 (1 cement: 6 fine sand) complete all as specified and as directed.

M&L 15 mm cement plaster of mix : 1:4 (1 cement: 4 fine sand) complete all as specified and as directed.

Cleaning and removing all scale and dirt, etc, from tanks of exc 500 & nesc 1000 ltr capacity and from mouths of circulating pipes, etc including making date of cleaning with synthetic enamel paint complete all as specified and as directed.

Note for Sl No. 01 to 27: (Work shall be carried out upto G+2 storey bldg, contractor to quote rates accordingly).

SRI SAI SIVA CONSTRUCTIONS (BID ID -3132292)

vvcenterprises (BID ID -3132324)

sri vishnu enterprises (BID ID -3132570)

SUN LIGHT HOUSE (BID ID -3130478)

Anjana corporation (BID ID -3130399)

Venkat Sai Enterprises (BID ID -3130503)