Estimation And Quantity Surveying

Estimation And Quantity SurveyingCONTENTSDADOBrief Specification Detailed Specification Rate Analysis

FLY OVER Approximate Estimate

Brief Specification for DadoProvide dado on 12 mm thick rough cement plaster (1:3) base and jointed with alkali resisted cement as per IS: 4457 completed as per the direction of Engineer-In-Charge.

Detailed Specification for DadoMaterialsPreparation of surface & layingMortar and beddingFixing tiles for dadoCleaning Pointing and finishing Mode of measurement

MATERIALS

White Glazed Tiles : The tiles shall be of approved and shall generally conform to IS : 777. They shall be flat and true to shape and free from cracks, blisters, welts, crawling, crazing spots, chipped edges, corners or other imperfections detracting from their appearance.The tiles shall be of square or rectangular of nominal sizes such as 300x200mm, 150x150mm, 100x100mm.Samples of tiles shall be got approved by the Engineer-in-charge before use on the work. Top surface of tile shall be glossy or matt as specified.

PREPARATION OF SURFACE & LAYINGSub grade concrete or RCC slab or side brick wall/ or plastered surfaces on which tiles are to be laid shall be cleaned, wetted and mopped.The bedding/backing for the tile shall be of C.M. 1.3 or as specified and shall be applied and allowed to harden. The mortar shall be roughened with wire brushes or by scratching diagonal lines 1.5mm. deep at 7.5mm.dado shall be truly horizontal and joints truly vertical. After the tiles have been laid, surplus cement grout shall be cleaned off.

MORTAR AND BEDDING

Cement mortar shall conform to the specification for materials, preparations etc. as specified under cement mortar. The amount of water added while preparing mortar shall be the minimum necessary to give sufficient plasticity for laying.Care shall be taken in preparation of the mortar to ensure that there are no hard lumps that would interfere with even bedding of the tiles.The mortar of specified proportion and thickness shall then be even and smoothly spread over the base by use of screed battens to proper level or slope.

FIXING TILES FOR DADO

The dado work, shall be done only after fixing the tiles/slabs on the floor.The approved white glazed tiles before laying shall be soaked in water for at least 2 hours.Tiles shall be fixed when the cushioning mortar is still plastic and before it gets very stiff. The back of the tile shall be covered with this layer of cement mortar 1:2 using fine sand (table III, zone IV, I.S. 383-1963) and the edge of the tile smeared with neat white cement slurry.The tile shall then be pressed in the mortar and gently tapped against the wall with a wooden mallet.

The fixing shall be done from bottom of wall upwards without any hollows in the bed of joints. Each tile shall be as close as possible to one adjoining. The tiles shall be jointed with white cement slurry. Any thickness difference in the thickness of the tiles shall be arranged out in cushioning mortar so that all tiles faces are in one vertical plane.The top of the dado shall be touched up neatly with the rest of the plaster above. After fixing the dado/skirting etc. they shall be kept continuously wet for 7 days. If doors, windows or other openings are located within the dado area, the corners, sills, jambs etc. shall be provided with true right angles without any specials.

CLEANINGAfter the tiles have been laid in a room or the days fixing work is completed, the surplus cement grout that may have come out of the joints shall be cleaned off before it sets.After the complete curing, the dado or skirting over shall be washed thoroughly clean.In the case of flooring, once the floor has set, the floor shall be carefully washed clean and dried.When dry, the floor shall be covered with oil free dry saw dust.It shall be removed only after completion of the construction work and just before the floor is used.

MODE OF MEASUREMENT Dado/flooring/skirting shall be measured in sqm. correct to two places of decimal.Length and breadth shall be measured correct to 1 cm.Between the exposed surfaces of skirting or dado. No deductions shall be made nor extra paid for any opening of area up to 0.1 sqm. The rate shall include all the cost of labour and materials involved.

Rate Analysis for DadoRate Analysis for 10 sq-mThe quantity of white-glazed tile is worked out by assuming 1 mm on either side for thickness in joint & tolerance in size of tiles. Thus, no of white-gazed tiles

= 10/(0.152X0.152)= ~ 432 tiles

Particulars QuantityOrNumbersRatePerAmountsWhite Gazed Tiles432 NosRs. 8.00noRs. 3456.00Wastage o white gazed tiles @ 5%Rs. 172.00C.M. (1:3) for rough plaster, bedding & wastage0.18 cu mRs. 2510.00Cu mRs. 451.80White CementSundries0.25 bagsRs. 950.00bagRs. 237.50Rs. 6.90Material Cost =Rs. 4325.00Labour:Labour for fixing, making rough coat of plaster, filling joints etc10.00 sq m Rs. 100.00Sq mRs. 1000.00

Labour Cost=Rs. 1000.00Add Material Cost=Rs. 4325.00 -------------------Total=Rs 5325.0010% Contractors Profit=Rs. 532.50

1.5% Water and electric consumption charges=Rs. 79.88 --------------------Rate per 10 sq m =Rs. 5937.38Rate per sq m=Rs. 593.74 Say=Rs. 595.00

Approximate Estimate of FLY OVER

Examples: National Project-At Mohan Nagar Junction in Ghaziabad, India.At Kampthee, Nagpur on NH-7, IndiaAt Sirmaur Chauraha Rewa, M.P., IndiaInternational Project-At Junction of Che Kung Road and Hung Mui Road, Honkong.At Mohan Nagar Junction in Ghaziabad, IndiaName of Project:Construction of Fly OverDetail of Client:National Capital Region Planning BoardDetails of Contractor:Asian Development Bank andWilbur Smith Associates Scope of Work:Fly Over with 2 lanes on existing road for 700 metersCost of Work:Rs. 539,160,413.00 Duration of Work:2 Years (work started on July 2008)Details, Project Progress:Completed on July 2010Resources Used:Manpower, Equipments, MachineriesNew Technology: Paver Finisher Hydrostatic with sensor controlPer meter cost:Rs. 7,70,229

At Kampthee, Nagpur on NH-7, IndiaName of Project:Construction of Fly OverDetail of Client:NHAIDetails of Contractor:Oriental Construction Company Pvt. LtdBackbone Enterprises Scope of Work:Fly Over on 850 Meter 2 lane roadCost of Work:Rs. 721,122,350.00 Duration of Work:2 Years (work started on July 2010)Details, Project Progress:Completed on July 2012Resources Used:Manpower, Equipments, MachineriesNew Technology: Fly Ash was used, Pile foundation was donePer meter cost:Rs. 8,48,379.00

At Sirmaur Chauraha Rewa, M.P., IndiaName of Project:Construction of Flyover Bridge at Sirmour Chouraha Rewa on Varanasi-Nagpur Road, Rewa, MP Detail of Client:Public Works Department M.P. Details of Contractor:Abhay Mishra Comstruction companyScope of Work:Fly Over with 750 meters long two laneCost of Work:Rs. 25 Crors Duration of Work:2 Years (Started on 2012)Project Progress:Under ProcessResources Used:Manpower, Equipments, MachineriesPer meter cost:Rs. 3,33,333

At Junction of Che Kung Road & Hung Mui Road, Honkong.Name of Project:Construction of Fly OverDetail of Client:Government of the Hong KongSpecial Administrative RegionDetails of Contractor:HKSARScope of Work:Construction of approximate 600 metres long dual 2-laneCost of Work:Rs. 537,140,479.00 Duration of Work:December 2007Details, Project Progress:Completion January 2013Resources Used:Manpower, Equipments, MachineriesPer meter cost:RS. 8,98,600

Average cost per meter =Rs. 5,37,635

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