annual repair annual repair and maintenance of residential and non residential buildings at 29 scg nsg kolkata for the year 2021 22 sh comprehensive maintenance of 08 eight nos . 13 passenger lift and 01 one nos 2000 kg goods lift , comprehensive maintenance of johnson make 13 passengers lift for 2 nos . lifts etc complete as reqd including less credit for available unserviceable dismantled materials . ( 12 months for 2 nos . lift ) ( for 4 floors ) block-1 , comprehensive maintenance of johnson make 13 passenger lift for 2 nos . lifts etc complete as reqd including less credit for available unserviceable dismantled materials . ( 12 months for 2 nos . lift ) ( for 8 floors ) block-ii , comprehensive maintenance of johnson make 2000 kg goods lift for 1 nos . lifts etc complete as reqd including less credit for available unserviceable dismantled materials . ( 12 months for 1 nos . lift ) ( for 14 floors ) , block-iii , comprehensive maintenance of johnson make 13 passengers lift for 1 nos . lifts etc complete as reqd including less credit for available unserviceable dismantled materials . ( 12 months for 1 nos . lift ) ( for 14 floors ) , block-iii , comprehensive maintenance of johnson make 13 passengers lift for 3 nos . lifts etc complete as reqd including less credit for available unserviceable dismantled materials . ( 12 months for 3 nos . lift ) ( for 16 floors ) , block-iv