CA No GE (I) (AF) /SHL/ OF 2022-2023 SPECIAL REPAIRS / REPLACEMENT OF ROOFS OF VARIOUS OTM AND MD ACCN AT AF STN LAITKOR PEAK UNDER GE(I) (AF) SHILLONG

Amount

Note : All unserviceable materials obtained out of demolition/dismantling/taking down (other than those for which credit catered under Schedule of credit) shall be disposed of outside MoD Land. Quoted rates against respective item shall deemed to include for same.

B/R ITEMS Dismantling plain or corrugated steel sheeting/galvalume sheet any guage, thickness including Nainital or similar pattern roof covering,complete all as specified and directed

S & F for pre-painted galvalume aluminum zinc coating GI based trapizoidal profile steel sheet 0.50mm thick (overall) of any colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as per manufacturers instructions complete all as specified and directed.

S & F for pre-painted galvalume aluminium zinc coating GI based plain steel sheet 0.50mm thick (overall) of any colour having tensile strength of 550 Mpa as in roof covering/cladding to wall/ eaves board etc., fixed with self tapping screws as per manufacturers instructions completed all as specified and directed.

Taking down eaves gutters/ boards and rain water pipes any size or pattern including all fittings , heads, shoes, bends, sawn necks etc including cleaning or refixing or removal to store ( measured overall as fixed along the centre line over fittings and accessories) complete all as directed.

M & L for roof trusses (framed), trussed, purlins, crane gantries, rails and fastenings and heavy bracket framing (Beam, tee, angle, channel or flat sections) including distance pieces, cleats etc confirming to Fe 410-W(Gde E-250) quality 'A' complete all as specifed and directed.

M & L for preparation new or previously untreated steel surfaces of any description over 10 cm width or girth and applying two coats of synthetic enamel paint of 1st grade quality over and including one coat of red oxide zinc chrome primer complete all as specified and directed.

Taking down existing roof treatment including PCC padding over roof, removing complete layer of bitumen under PCC padding, cement mortar & felt cleaning the surface by hacking to receive plaster and removing demolished material outside MD land complete all as specified and directed.

Supply and fix APP polymeric water proofing membrane, minimum 3mm thick and weighing not less than 3.5 Kg/Sqm , black finish reinforced with non-woven polyester reinforcement matt, with a thermo fusable finish laid over compatible cold emulsion bituminous primer applied at the rate of 0.40 Kg/Sqm by torching with a propane or a butane gas torch, with a overlap of 75mm on longitudinal direction and 100mm on transverse direction including sealing all as per manufacturer’s instructions complete all as directed. Note: (i) Coved fillets in PCC(1:2:4) type B-0 using 12.5mm graded stone aggregate, of radius 75mm shall be provided at the junction of roof and parapet wall/mumty/chimney/other vertical surfaces and thereafter surface painted with hot paving bitumen of Grade 30/40 confirming to IS-73, [email protected] Kg/Sqm over a coat of bituminous primer confirming to IS-3384 applied @ 0.40 Kg/Sqm. (ii) Polymeric membrane shall be taken to a height of 45cm (minimum) and then inserted inside the groove of parapet wall of brick masonry and shall be finished by a membrane flushing. (iii) The waterproofing treatment shall be got carried out by the manufacturer or their authorized applicators. (iv) In case of stone masonry parapet wall etc a groove of size 25mmx25mm(minimuim) shall be made in coved fillet at the junction of roof and parapet wall/mumty Chimny/other vertical surfaces and polimeric membrane insterted in groove and sealed with paving bitumen (v) Exposed surfaces of APP membrane shall be applied with one coat of bituminous aluminium paint @ 100 Gms/Sqm. (vi) Above aspects are deemed to be included in quoted rate.

Dismantling wrought iron, or mild steel work of any description not otherwise provided for complete all as directed.

M/S RAGHU NATH SAH

kapoor and co

M/S BISWA CONSTRUCTION

shri aloysius arengh

MAHINDER ELECTRICALS