tender for construction of new two class room building at k.l.krishnasamy naidu pues in gummidipoondi town panchayat west , earthwork excavation for foundation (for narrow excavation) to full depth as per designed in all soils and sub soils except soft disintegrated rock not requiring blasting and hard rock requiring blasting and bailing water wherever necessary. refilling the sides of foundation with excavated earth other than sand in layers of well rammed and compacted and depositing the surplus earth in places shown by the departmental officers with an initial lead of 10m and initial lift of 2m and clearing and leveling the site etc. complete complying with standard specification. , supplying and filling in foundations and basement with filling m- sand in layers not exceeding 15 cm.thick,well watered,rammed and consolidated etc. complete complying with standard specifications. , plain cement concrete 1 : 4 :8 ( one part of cement, four parts of sand and eight parts of hard broken stone ) using 40 mm gauge hand broken hard broken granite stone jelly complying with standard specifications in foundations and basement. , refilling the approved good quality earth in plinths, area development etc. wherever specified in layers is not exceeding 200 mm thick, with available earth at site. , supplying and filling of good earth filling locally available earth transported from the outside including consolidation, leveling specified in layers of not exceeding 200 mm thick., etc. complete. , supplying and erecting centering and shuttering for soffits including necessary supports and strutting up to 3 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 about 90 cm centre to centre and supported by casurina props of 10cm to 13 cm dia spaced at not more than