tender for repair and maintenance of existing drainage with cover slab at periyar nagar in sholapuram town panchayat.; 1 dismantling of brick work and clearing away from the site to 2km to 3km. etc., complete as per standard specifications. 2 supplying and filling in foundation, basement, etc with filling stone dust in layers of not more than 15cm thick well watered, rammed and consolidated etc. complete complying with standard specification and as directed by the departmental officers. 3 cement concrete 1:4:8 (one cement, four crushed stone sand and eight hard broken stone jelly) using 40 mm gauge hard broken granite stone jelly for foundation including dewatering wherever necessary and laid in layers of not more than 15 cm thick well rammed, consolidated and including curing etc. complete complying with standard specification and as directed by the departmental officers -mixing by mechanical means 4 supplying and erecting steel centering including necessary supports for plane surfaces for reinforced cement concrete works such as column footings, column pedestals, plinth beams, grade beams, staircase steps, sill slabs etc. which require only nominal strutting using mild steel sheets of size 90cm x 60cm and 10 bg stiffened with welded mild steel angles of size 25mm x 25mm x 3 mm for boarding, laid with silver oakjoists of size 10cm x 5cm& 7.5cm x 5cm as support runner , vertical stiffener, side support and top horizontal stiffener spaced at about 60cm to 90cm centre to centre or at suitable intervals etc. complete in all floors complying with standard specifcation. 5 plain cement concrete 1:2:4 (one cement, two crushed stone sand and four hard broken stone jelly) using 20mm jelly for wearing coat including laying, compacting, finishing and curing, etc., complete as per standard specificatins and as directed by the departmental officers.-mixing by mechanical means(s.no:135-sd book vol-i ) 6 manufacturing, supplying and fixing of 75mm precast reinforced cement concrete slabs of following thickness in rcc 1:11/2:3 (one cement, one and half sand and three aggregates), using following hbgs jelly including cost of reinforcement steel in position but including cost of moulding charges, casting of slab, finishing, curing and fixing in position in all floors etc., complete complying with standard specification and as directed.