roof treatment works of 3 nos officers field hostel and d2 quarter at ppsp township , bagmundi , purulia roof treatment works of 3 nos . officers field hostel and d2 quarter at ppsp township , bagmundi , purulia . , dismantling all types of masonry excepting cement concrete plain or reinforced , stacking serviceable materials at site and removing rubbish as directed within a lead of 75 m , in 1st floor including roof . , in 2nd floor including roof . , dismantling all types of plain cement concrete works , stacking serviceable materials at site and removing rubbish as directed within a lead of 75 m . up to 150 mm . thick , in 1st floor including roof . , in 2nd floor including roof . , stripping off worn out plaster and raking out joints of walls , ceilings etc . up to any height and in any floor including removing rubbish within a lead of 75m as directed . , ordinary cement concrete ( mix 1:2:4 ) with graded stone chips ( 6 mm nominal size ) excluding shuttering and reinforcement , if any as per relevant is codes . pakur variety , in 1st floor including roof . , in 2nd floor including roof . , 125 mm . thick brick work with 1st class bricks in cement mortar ( 1:4 ) , above roof of 1st floor . , above roof of 2nd floor . , plaster ( to wall , floor , ceiling etc . ) with sand and cement mortar including rounding off or chamfering corners as directed and raking out joints including throating , nosing and drip course , scaffolding/staging where necessary ( ground floor ) . [excluding cost of chipping over concrete surface]with 1:6 cement mortar20 mm thick plaster , in 1st floor , in 2nd floor , cleaning the concrete surface by removing dirt and debris , marking defective locations and removing loose concrete by careful stripping untill hard surface is exposed , cutting the concrete to regular shape , wire brushing the exposed surface and removing debris from site complete as per direction of the engineer - in - charge . , applying 2 coats of bonding agent with synthetic multi functional rubber emulsion having adhesive and water proofing properties by mixing with water in proportion ( 1 bonding agent : 4 water : 6 cement ) as per manufacturers specificationat roof top and brick walls , supplying & laying 3mm thick pre-fabricated plastomeric water proofing membrane conforming to en 12311-1 & astmd 5147 , manufactured with atactic poly propylene ( app ) modified premium grade asphalt , specially reinforced with non-woven polyester core with polyester reinforcement @160 gms per sqm & both faces covered with thermo-fusible polyethylene film /mineral on top face over a coat of primer @ 0 . 40 lit/sqm of manufacturers specification on smooth , clean dry surface prepared wherever required . lap joint shall be provided of 75 mm in longitudinal & 100 mm in transverse direction and fused using lpg/ propane torch employing extra care ensuring full bondage , complete removal of entrapped air and sealing edges into grooves in appropriate manner as per direction of engineer -in-charge all complete including terials , labour and applicable taxes . ( payment shall be made on the basis of finished surface area . ) . membrane property: softening point > 150 deg c , cold flexibility < -6 deg c , tensile strength , n/cm : 600 ( longitudinal ) , 450 ( transverse ) , tearing strength , n: 300 ( longitudinal ) , 200 ( transverse ) , total in figures - , gst as applicable @18% of base price - , cost of civil works excluding labour welfare cess - ( a+b ) - , labour welfare cess @1% on c - , cost of civil works including labour welfare cess ( c+d ) - , deduct gst ( b ) - , estimated amount excluding gst but including labour welfare cess -