drain, chamber and block work under zone 04 ( sbm 2022 ) -2 crusher stone dust 3 cement concrete grade m-10 ( nominal mix ) with 20 mm maximum size of stone aggregate 4 mild steel and medium tensile steel bars. 5 cement concrete grade m-20 ( nominal mix ) with 20 mm maximum size of stone aggregate. 6 walls ( any thickness ) including attached pilasters, butteresses, plinth and string courses etc 7 cement concrete grade m-20 ( nominal mix ) with 20 mm maximum size of stone aggregate. 8 red sand stone 9 foundations, footings, bases of columns, etc. for mass concrete. 10 cement concrete grade m-20 ( nominal mix ) with 20 mm maximum size of stone aggregate 11 cement concrete grade m-15 ( nominal mix ) with 20 mm maximum size of stone aggregate 12 structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoist 13 providing and laying 60 mm thick factory made cement concrete interlocking paver block of m -30 grade made by block mak 14 providing and fixing ist quality ceramic glazed wall tiles conforming to is: 15622 ( 6 to 7mm thick ) of approved make i 15 providing and laying ceramic glazed floor tiles 300x300mm or more ( 6 to 7 mm thick ) of 1st quality conforming to is : 1 16 powder coated aluminium ( minimum thickness of powder coating 50 micron )