GER-18/2020-21 Repair Replacement of water proofing treatment to existing RCC roof slabs CGI sheets false ceiling PVC water tanks and cleaning of old water tanks under AGE BR Dett III of GE 862 EWS

Amount

Complete removal of existing water proofing treatment over RCC roof, projections of any thickness, any type by stripping out old tar felt over roofs, parapets, chimney stacks etc laid horizontally or vertically including taking out layer of cement plaster etc and cleaning the surface with wire brush including removing debris from the site and depositing in low lying area where directed and providing following :- (a) Rendering 10mm thick in CM 1:3 on concrete roof surfaces and finish the surface even and smooth without using extra cement including mixing water proofing compound @ 2% by weight of cement. (b) Apply a coat of bituminous primer confirming to IS-3384@ 0.4 ltr/Sqm on newly plastered surface after curing as per IS-456 and dried. (c) After the primed surface has dried, apply a coat of hot blown bitumen(85/25 penetration) confirming to IS-702 @ 1.2 Kg/Sqm of the surface. (d) Provide polymeric water proofing membrane ISI marked laid with overlaps, bonded with hot blown bitumen, and laid by torch application method, end overlaps shall not be less than 150mm and side lap 75mm. Polymeric water proofing membrane should be five layered with centre core as 90 micron high molecular high density polyethylene film, min weight 3 Kg per sqm. APP membrane shall laid acorss the slope from lowest line of sloping roof towards ridge. (e) Over the APP membrane, apply a coat of semi hot blown 85/25 penetration grade bitumen confirming to IS-702 @ 1.20 Kg/ sqm and blinded with fine sand in dry condition @ 0.50 Kg / Sqm dusted over the bitumen coat Note : (i) Care shall be taken to avoid wrinkle and air gaps while sticking membrane to the bitumen applied surface. (ii) Ponding test shall be conducted for 72 hrs as directed by Engr-In-Charge. (iii) Water proofing compound shall be measured and paid for separately.

Supply only integral water proofing compound complete all as specified and directed.

Cutting out cracks to "V" section in existing roofs or terracing, cleaning out, wetting, grouting with cement and sand slurry in CM 1:3 complete all as specified and directed.

Demolition of concrete of any description and in any position not otherwise specifically provided for complete all as specified and directed.

PCC type B-1, 1:2:4 (using 20mm graded stone aggregate) in roof kerbs or mud stops, rounded or chamfared on edges complete all as specified and directed.

Dismantling plain or corrugated steel sheeting, any gauge, thickness including Nanital or similar pattern roof covering complete all as specified and directed.

Dismantling asbestos cement (corrugated, semi corrugated etc) sheeting in roof covering complete all as specified and directed.

Dismantling structural steel work including doors, gates etc complete all as specified and directed.

Dismantling timber scantling 40 Sqcm and over in section, in any position as in unframed or framed work complete all as specified and directed.

Mild steel structural steel work as in roof trusses (framed, trussed purlins including tubular members), main and cross beams, hip and jack rafter, purlins where connected to common rafters and running rails and guides for sliding doors; fixed with angle cleats or other connecting plates and painted with a shop coat of zinc chromate primer before hoisting and fixing in position conforming to Fe 410 -W (GdeE- 250) quality A and tubular members shall confirming to I. S.1161 1979 grade St.-240 complete all as specified and directed.

Pre-painted galvalume aluminium zinc coated GI based corrugated steel sheet 0.50mm thick of approved colour having tensile strength 550 MPa as in roof covering/cladding to wall fixed with self tapping screws including side and end lap as per manufacturer’s instructions complete all as specified and directed.

Pre-painted galvalume aluminium zinc coated GI based plain steel sheet 0.50mm thick of approved colour having tensile strength 550 MPa as in ridges, fixed with self tapping screws including side and end lap as per manufacturer’s instructions complete all as specified and directed.

4mm thick designer ceiling board in ceiling fixed with screw as per manufacturers instructions, laid over and including hot dipped galvanised iron in post grid with 24mm wide T section exposed flanges which shall be powder coated white. The frame work shall comprise of main runner made from 0.33 mm thick galvanised steel sheet of size 24 x 32 x 300 mm spaced at 1200 mm centres securely fixed to the structural soffits by approved hangers at 1200mm maximum centres. Hangers of GI wire 4 mm dia to be fixed by approved rawl plug or hanged with existing truss members. The last hanger at the end of each main runner shall not be greater than 450 mm from adjacent wall flush fittings of 1200 mm long screws Tee with (double stiching) to interlocked between main runners at 600 mm centre to centre from 1200 x 600 mm modules cross tee longer than 600 mm modules to be formed by fittings 600 mm long cross tee, tee perimeter wall angle shall be of 0.45 mm thick galvanised steel of size 19 x 19 mm and 300 mm long of white colour all as per insturctions including dismantling of existing board etc complete all as specified and directed.

Preparing new zinc (or galvanised) roof surface to receive painting, by coating with mordant solution including washing and cleaning, etc and applying two coats of synthetic enamel paint of approved shade complete all as specified and directed.

Rotational moulded polythylene water storage tank (ISI marked) with plastic lid cover, double layered, cylindrical vertical with closed top hoisted and fixed in position of capacity 500 ltrs including dismantling old unserviceable tank and making connections inlcuding suitable GI wash out, over flow, nipple and including ball valve of PTMT 15mm bore with epoxy coated Aluminium rod & high density plastic ball screwed for iron pipe and fixed. (minium weight 15mm-142 gms complete all as specified and directed.

Rotational moulded polythylene water storage tank (ISI marked) plastic lid cover, double layered, cylindrical vertical with closed top hoisted and fixed in position of capacity 1000 ltrs including dismantling old unserviceable tank and making connections inlcuding suitable GI wash out, over flow, nipple and including ball valve of PTMT 15mm bore with epoxy coated Aluminium rod & high density plastic ball screwed for iron pipe and fixed. (minium weight 15mm-142 gms complete all as specified and directed.

Cleaning and removing all scale and dirt etc from tank and from mouth of circulating pipes etc.Tank of capacity exc. 250 Ltrs and n. exc. 500 Ltrs including making good any damage of the parts and fittings etc and finally washing with clean water mixed with bleaching powder and including writing date of cleaning on side of tank with white paint using proper stencil minimum 50mm height complete all as specified and directed.

Cleaning and removing all scale and dirt etc from tank and from mouth of circulating pipes etc.Tank of capacity exc. 500 Ltrs and n. exc. 1000 Ltrs including making good any damage of the parts and fittings etc and finally washing with clean water mixed with bleaching powder and including writing date of cleaning on side of tank with white paint using proper stencil minimum 50mm height complete all as specified and directed.

Taking up or down GI tubing 15 mm bore and connections including cleaning for refixing or removal complete all as specified and directed.

Taking up or down GI tubing 20 mm bore and connections including cleaning for refixing or removal complete all as specified and directed.

15 mm bore galvanized iron GI tubing medium grade with all fittings such as bends, socket, Tee, Elbow, union, Nipple, short pieces and fixed to walls, ceilings or laid in floors complete all as specified and directed.

20 mm bore galvanized iron GI tubing medium grade with all fittings such as bends, socket, Tee, Elbow, union, Nipple, short pieces and fixed to walls, ceilings or laid in floors complete all as specified and directed.

Refixing of old steel tubing and connections in new or old position with all new fittings to floor, wall or ceiling as directed, 15mm bore GI tubing ( using seviceable pipes obtained from taking down after cleaning) complete all as specified and directed.

Refixing of old steel tubing and connections in new or old position with all new fittings to floor, wall or ceiling as directed, 20mm bore GI tubing ( using seviceable pipes obtained from taking down after cleaning) complete all as specified and directed.

Demolition of Brickwork or stone/boulder masonry, built in cement mortar including all quoins, arches, pillars, etc, but excluding ashlar facings, dressed stonework and precast concrete articles complete all as specified and directed.

Brick work with sub class ‘B’ bricks, straight or curved on plan exc 6m mean radius, built in CM 1:6 complete all as specified and directed.

Description all as per Srl item No 26 above but except bricks using old serviceable bricks obtained from dismantling after cleaning complete all as specified and directed.

Walling of random rubble masonry, uncoursed, well bonded, bedded and solidly hearted, built in CM 1:6 complete all as specified and directed.

Description all as per srl item No 28 above but except stone using old serviceable stones after cleaning complete all as specified and directed.

Extra over stone walling for hammer dressing to face stones and dressing of face beds with maximum depression on face from straight edge held against the dressed surface n exc 40 mm of random rubble walling, uncoursed or brought upto courses complete all as specified and directed.

Rendering 15mm thick in CM 1:4 on other than fair faces of brick work or stone masonry surfaces, finished even and smooth without using extra cement complete all as specified and directed.

Preparation of newly plastered surfaces of walls and applying two coats of cement base paint over a coat of cement primer complete all as specified and directed.

Preparation of new or previously untreated steel or iron surfaces of any description over 10 cm width or girth not otherwise described and applying two coats of Synthetic enamel paint complete all as specified and directed.

Note:- The contract sum arrived after deduction of amount of Sch of credit as listed in tender Documents.

M/S BAKSHI TEK CHAND AND SONS

SATVIR GUPTA ENGINEER and CONTRACTOR

M/S RAHUL GUPTA

m/s vishkarma construction

NATIONAL TRADING COMPANY

RAJINDRA ENGINEERS & CONTRACTORS