supply and fixing of rcc pre cast slabs over the existing swd @ devaki street,rettaimalai srinivasan street, sakthikhan masthiri street, duraisami mudalaiyar st,angamman koil st,pillaiyar koil st,mettu st,dr.vaitheeswaran st,ragavelnaikar st,subramani bharathi st,thiruvallur st,m.k.gandhi st,devanbu st,rajaji st) innaravarikuppam town panchatyat.; 1 supplying and fixing rcc pre cast slab in rcc 1:1 1/2:3 mix including cost of reinforcement grill but including moduling, finishing watering curing and fixing in position etc., complete as per std., specifications., 2 ordinary soil (ss20a) earth work excavating and depositing on bank with initial lead of 10m & initial lift of 2m in sand, silt or other loose soil, wet sand or silt not under water, light black cotton soil sandy loam and ordinary soil including excavated earth (ss20a)