miscellaneous civil work for the extension of maize elevator top roof at cattle feed plant , malampuzha . , providing and laying m25 concrete with 20mm down size aggregate in super structure upto 12m height from plinth level as per technical specifications . , providing and erecting form work for structures in super structure upto 12m height from plinth level including necessary stage shuttering as per technical specifications . , providing , fabricating and placing in position tmt reinforcement steel as per technical specifications . , finishing work :- providing and applying cement plaster in cm 1:4 12mm thick as per technical specifications . , roofing work:- supply , fabricate and erect in position structural steel work for trusses , purlins , girder , column , rafters , strus , wind ties , floor tile beam , structural members for strew box , site cladding , platform etc . as per design including riveting , , providing , fabricating and erect in position ms pipe/ms square hollow section work for trusses , purlins , rafters , struts etc . as per design including riveting welding in rolled steel sections and plates with all necessary nuts , bolts , rivets , gusset plate , providing and fixing 0 . 5mm thick meta colour/poly steel sheets ( galvaloom or equivalent ) with necessary poly propylene washers self trapping screws etc . for roofing . , providing and fixing meta colour roofing sheeting accessories such as rain water gutter , ridge etc , as per technical specifications . , providing and fixing approved quality roof lightsheet , dismantling carefully the existing sheeted roof with ms structural members over the existing plant above 26 m height and stacking the same with in the site .