REPAIR TO RCC ROOF, AC AND CGI ROOF SHEETS AND STRUCTURAL MEMBERS IN 515 ABW, HARRIS BK, MARSHALL BK ETC UNDER AGE B/R (CENTRAL) OF GE (SOUTH) BANGALORE

Amount

M&L for 10 mm thick rendering in cement mortar 1:4 on concrete surfaces mixed with integral water proofing compound as per manufacturer's instructions, surfaces finished even and smooth without using extra cement including dismantling existing water proofing treatment any type and any thickness from top surface of RCC roof slab and removing the materials outside defence land complete all as specified and directed. (Note:- Water proofing compound shall be measured and paid separately as supply only under relevant item of this schedule)

Preparing the surface by Chipping of the loose/dead concrete, preparing the surface by removing the dust and laitance etc, Identify cracks and groove cut the cracks which is >5mm, clean the cracks and fill the same with precision grout or PU Sealant. Apply one coat of polymer based priming bond coat 1:4:7 (polymer, water and cement) to seal all the pores on the treated surface. Lay 45GSM glass fibre mesh or geo textile on the primed surface while it is in tacky condition. Apply two coats of PU RoofKoat/Davko K10 on the Glass Fibre Mesh with a gap of 3-4hrs between the coating from the authorised applicators complete all as specified and as directed. Note: (i) Average minimum thickness of PU based material shall be 1mm thick and shall be applied by the Graco spray pump. (ii) The work shall be carry out by the authorized applicator of the manufacturer. Necesary approval shall be taken from the GE prior to the work execution. Make : STP / Berger / Cico / Pedilite

Preparing the new plastered surface of roof, removing the dust and laitance etc, Apply one coat of polymer based priming bond coat 1:4:7 (polymer, water and cement) to seal all the pores on the treated surface. Lay 45GSM glass fibre mesh or geo textile on the primed surface while it is in tacky condition. Apply two coats of PU RoofKoat/Davko K10 on the Glass Fibre Mesh with a gap of 3-4hrs between the coating from the authorised applicators complete all as specified and as directed. Note: (i) Average minimum thickness of PU based material shall be 1mm thick and shall be applied by the Graco spray pump. (ii) The work shall be carry out by the authorized applicator of the manufacturer. Necesary approval shall be taken from the GE prior to the work execution. Make : STP / Berger / Cico / Pedilite

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

Dismantling plain or corrugated steel sheeting, any gauge, thickness, including Nainital or similar pattern roof covering.

Dismantling of cement corrugated, semi corrugated sheets in roof coverings.

Dismantling unframed timber scantling 40 sq cm and over in section in any position

S&F pre-painted galvalume aluminium zinc coating GI based corrugated steel sheet 0.50 mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified.

S&F pre-painted galvalume aluminium zinc coating GI based plain sheet steel sheet 0.50 mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws as specified.

S&F 1.8 mm thick plain, galvanised, zinc coating mild steel plain sheeting in ridge, hips, valley gutters, drip and straight flashing (length and grith as fixed) with grade of zinc coating 275.

S&F rolled sections as in main and cross beams, hop and jack rafters, purlins where connected to common rafters and running rails and guiders for sliding doors fixed with angle cleats or other connecting plates, conforming to Fe-410-W (Gde-E-250) quality-A.

M&L preparation of new or previously untreated steel and iron surfaces of any description, over 10 cm in width or girth, not otherwise described and applying two coats of synthetic enemel paint over a coat of red oxide.

M&L preparation of old painted steel and iron surfaces of roof trusses or any description, over 10 cm in width or girth, not otherwise described and applying one coat of synthetic enemel paint.

S&F 110 mm bore PVC (SWR) pipes single socketed, in any length with rubber ring joints,fixed to wall including taking down of existing one any size complete all as specified & directed.

S&F in repairs 110 mm bore PVC (SWR) bend complete all as specified and directed.

S&F 1000 Ltrs. Capacity rotational moulded polyethylene water storage tanks (cylinder vertical with class top) hoisted and fixed in position including dismatling and removing to store all as specified

S&F 500 Ltrs. Capacity rotational moulded polyethylene water storage tanks (cylinder vertical with class top) hoisted and fixed including dismantling and removing to store in position all as specified

Dismantling, cleaning and removing all scale and dirt etc from 1000 Ltr capacity rotational moulded polyethylene water storage tanks (cylinder vertical with class top) hoisted and re fixed in position all as specified

Dismantling, cleaning and removing all scale and dirt etc from 500 Ltr capacity rotational moulded polyethylene water storage tanks (cylinder vertical with class top) hoisted and re fixed in position all as specified

S&F 20 mm bore Ball valve high pressure of PTMT with epoxy coated Aluminium rod & high density plastic ball screwed for iron pipe and fixed. (Minimum weight 20mm-210gms) complete, fixed in repairs, all as specified.

S&F in repairs 20 mm bore nipple suitable for HDPE water tank. (Min wt 45 gms).

S&F in repairs HDPE PVC lid (cover) for 500 ltrs/1000 ltrs capacity PVC tank complete all as specified.

S & F of CPVC pipes 20mm dia SDR 11 & Plain CPVC SDR 11 fittings on walls/ceiling or laying in floors including taking down of pipe of 20 mm GI pipe complete all as specified.

S&F in repairs PP-R Gate valves (brass insert), 20mm outer dia of pipe of design as per site requirement all as specified and as directed.

S&F in repairs PP-R Gate valves (brass insert), 25mm outer dia of pipe of design as per site requirement all as specified and as directed.

Removal of vegetation/tree growth etc on external surface of walls/roofs of single/multi storeyed building including digging out and filling holes with PCC 1:2:4 type B1 using (20 mm graded stone agg) and finishing the surface to match adjacent surfaces after application of suitable chemical to avoid re-growth of the vegetation and removing the debris outside MD land complete all as specified and directed (any damage to the adjacent govt properties shall be made good without any extra cost) for plants girth not exc 25 cm

All as per item no 26 above for plants girth exc 25 cm.

MAA ENGINEERING SERVICERS (BID ID -3099562)

Elite Constructions (BID ID -3108988)

G D ENTERPRISES (BID ID -3122383)