SPECIAL REPAIRS TO HANGAR FLOORING OF BUILDING NO P363 PEB 4 AND P311 E HANGAR AT INS RAJALI ARAKKONAM

M&L of following all as specified and as directed: (a) Preparation of existing concrete surfaces by Mechanical grinding to provide a clean and dry surface, free from laitance, oil and grease, curing compounds or other surface contaminants. All blowholes and other surface undulations shall be repaired using PU repair mortar system and all the damaged part of existing flooring system must be filled with PU based chemical as per specification.. Note: Floor to be cleaned by using all mechanised equipment such as scrubbers sanders, hot blowers, vaccum cleaners and moisture test machine etc., all as directed. (b) PU Flooring: M&L for providing and applying Cementitious polyurethane floor topping at thickness of 4 mm using three component product. A forced action rotary paddle mixer is recommended for the mixing the product. Continue..

Item No 01 Continued.... Topping applied at 3 mm thickness over a scratch coat with Cementitious polyurethane material of 1 mm to have smooth matt finish, including trating the edges of joint with appropriate profile for taking dynamic continuous wheel loads etc., complete as per manufacturer specification and as directed by Engineer-in-charge. ESD copper tape with 25 mm width and 80 micron thickness should be laid in an average of 4mx4m and carbon coating should be done as per manufacturer recommendation. The finished surface after curing shall be capable of the following: (i) Compressive Strength (ASTM C109) 28 days at 56 MPA, (ii) Tensile strength (BS6319-7) 10 MPA, (iii) Flexural strength (BS6319-3) 21 MPA, (iv) slip resistance (ASTM E303) Dry, S56/S96-22/32 (moderate slip risk), (v) Impact Resistance (ASTM D2794), (vi) 8.1 Joules, high resistance to damage. Ensure that the construction, control joint and other anchorage grooves of 8 mm x 8 mm are fully wetted out with material at the edges, day joints, up-stands, drain, doorways and at regular points across the floor and all debris removed, including surface preparation and colour as per user requirement. The application should be done through authorized applicator of approved manufacturer,complete all as specified and as directed by the Engineer-in-Charge.

M&L for 150 mm width line marking using polyurethane based material of required colour of 90/100 microns thick according to the lay out and as per requirement all as per the manufacturer specification approved. The application should be done through authorised applicator of manufacturer, complete all as specified and as directed by the Engineer-in-Charge.

Material and labour for copper single core round cable of size 10 sqmm, complete all as specified and as directed by the Engineer-in-Charge.

S&F Aircraft bonding pin and clamp with suitable grounding plug/clip cable assy of brass made, complete all as specified and as directed by the Engineer-in-Charge.

Demolition and disposal of hardstanding of size 0.6 m x 0.6 m x 0.3 m for providing earth pit chamber at dispersal/ hanger area ,complete all as specified and as directed by the Engineer-in-Charge.

Material and labour for fixing Copper earth strip 32 x 6 mm with all connecting accessories on wall batten or buried in ground or drawn in pipe or fixed to poles or any other required at site for loop earthing etc., complete all as specified and as directed by the Engineer-in-Charge.

M&L for test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hex. Head screw including taking down old unserviceable, complete all as specified and as directed by the Engineer-in-Charge. Note: Old test point terminal block shall be handed over to AGE E&M store.

Material and labour for GI Pipe 40 mm light grade galvanised, with all fitting laid in trenches/wall/floor, complete all as specified and as directed by the Engineer-in-Charge.