tender for construction of strom water drain at ward no.7 burma colony madhavan nagar and indra nagar in thiruppuvanam town panchayat; 1 earth work excavation for foundation and depositing on bank with in the initial lead of 10m and a lift of 2m in hard stiff clay, stiff block cotton, hard red earth, shales, murram, gravel, stoney earth and earth mixed with small size boulders etc., as per ss 20 a. tndss no: 23 & 24 vi ( s2 ) vi, vii 9, 10with standard specifications. 2 plaincement concrete 1:4:8 mix ( one cement, four fine aggregate and eight coarse aggregate ) using 40mm iss hbg metal for foundation and basement including dewatering if found necessary and laid in layer of not more than 15cm thick and consolidated including all cost conveyance of materials and labour charges etc. complete as per standard specifications and as directed by departmental engineers ( tnbp no.28 ) . 3 supplying and erecting centering for sides and soffits including necessary supports and strutting upto 3.29 m height for plane surfaces as detailed below in all floors with all cross bracings using mild steel sheets of size 90 x 60 cm and 10 bg stiffened with welded mild steel angle of size 25mm x 25mm x 3 mm for boarding laid over silver oak joists of size 10cm x 6.50 cm spaced at abote 90 cm centre to centre and supported by casurina props of 10cm to 13 cm dia spaced at not more than 75 cm centre to centre etc. complete complying with the standard specificaiton. ( payment for centering shall be given after the concrete is laid ) for kerb wall 4 plaincement concrete 1:2:4mix ( one cement, two fine aggregate and fourcoarse aggregate ) using 20mm iss hbg metalincluding all cost conveyance of materials and labour charges etc. complete as per standard specifications and as directed by departmental engineers ( tnbp no.28 ) . 5 finishing the top of flooring with granothatic flooring with cement concrete 1:2:4 ( one cement, two sand and four aggrigate ) using 10 to 12mm stone chips – 25mm tk etc., complete.