purchase items for this work ( const. of closed gutter in high school and karal wasti ) at. mandave tal. malshiras , purchase items for this work ( const. of closed gutter in high school and karal wasti ) at. mandave tal. malshiras , providing and laying cement concrete pipe of is 458:2003 np-2 class of 450mm diameter in proper line, level and slope including providing and fixing collars in cement mortar 1:2 and curing etc. complete. , providing and constructing brick masonry inspection chamber 60cm x 45cm x 90cm including 1:4:8 cement concrete foundation 1:2:4 cement concrete channels half round g.s.w. pipes, brick masonry, plastering from inside and airtight c. i. cover of 75 kg with lid and frame fixed in cement concrete. , add g.s.t. charges ( 12% )