15th Finance 2024-25 Tied OHT mainatance

Amount

Dismantling the existing damaged reinforced cement concrete portion clearing away and carefully taking material useful for reuse for any thickness of concrete including all cost etc. as per standard specification.

Supplying and erecting centering for sides and soffits including supports and strutting up to 3.29 m height for plain surfaces such as RCC slabs rectangular beams Tee or L beams lintels, stair case beam etc. in all floors with all cross bracing using mild steel sheets of size 90x60 cm and BG10 gauge stiffended with welded mild steel angles of size 25x25x3 mm for boarding laid over silver oak country wood joists of size 10x6.5 cm spaced at about 90 cm center to center and supported with casurina props of 10 cm to 13 cm Ø spaced at 75 cm center to center etc. complete complying with standard specification in all floors.

Plane surface

Curved surface

Supplying, fabricating and placing in position of Steel Reinforcement using Mild steel or ribbed tar steel rods, for all RCC works as per the design given by the departmental officers including cost of steel cutting, bending, placing in position and binding with binding wire and all labour charges for cutting, bending, tying and placing in position etc, complete.

Reinforcement Cement concrete 1:1½:3 (one part of cement one and a half part of sand and three part of aggregates) using machine broken granite jelly of 20 mm size for all reinforced cement concrete works excluding cost of centering shuttering strutting and also cost of reinforcement grill in position but including laying vibrating with mechanical vibrators using finishing etc complete, as directed by the departmental officers etc complete complying with standard specification. TNDSS No:30

For items above 7.32 m & up to 10.98 m from GL

Providing two legged scaffolding using 15 cm blue gun posts or casurina props or best quality bamboo posts at 4 metres over all length, the distance between two rows being 1.25 metre and spacing of posts 2 metres. in both the rows with two horizontal posts with 0.5 metres over lap on either side and braces at 2 m c/c including longitudinal and traverse middle braces to step up as providing a platform with country wood planks of 40 mm thick and 1 Mt. width etc. in complete around the OHT of total height 10.50 metre.

Construction of RCC spiral staircase in RCC 1:1½:3 20 mm HBGS of 1.80 m Ø of required 10.50 m height for approach to the roof of SR with RCC hand rails as per type design including necessary earth work for providing foundation in CC 1:4:8 mix RCC footing 1:1½:3 mix, GL platform etc. including cost of steel reinforcement, fabrication charges, scaffolding charges, centering, precasting charges, cement painting etc complete. The staircase should be braced to the column of service reservoir at suitable interval etc complete.

Supply and fixing of RCC hand rail of height 0.90 m supporting with RCC support column including casing of hand rail fixing in position at the top of the roof slab of OHT including cost of all materials and all labour charges etc complete.

Painting two coats with ready mixed plastic emulsion paints of first class quality and of approved colour over a priming coat including through scraping clean removal of dirt etc, complete and including cost of necessary plaster of paris, putty, brushes, wherever required and all labour charges, scaffolding charges etc., complete as per standard specification.

Providing manhole cover of size 0.60 x 0.60m in RCC 1:1:5:3 with suitable reinforcement and 50x50x6mm MS angle fixed along edges and as directed by Departmental officers.

RAJA MOHAN (BID ID -1228986)