corrigendum : supply of construction material 1). portland cement (opc-43 grade) manufacturing company must be an iso 9001: 2015 certified company 2). crushed stone coarse aggregate ( bajri) 3). fine aggregate ( sand ) 4). stone (nallah) 5). structural steel such as tees, angles, channels and r.s. joists etc 6). twisted steel/ deformed tmt bars fe-500d and of different size/ dia 7). galvanised steel corrugated sheets of 0.50 mm thick with zinc coating. 8). bricks common burnt clay non