Specification & Quantities Estimating Lecturer Maha Muhaisen College of Applied Engineering& Urban Planning

Item description Based on drawings, specification. It should be accurate and reflect the drawings and specifications, Description should include : 1- what does the price include: 2- unit 3- determine the method of measurement.

How to read the description Description of the items Drawings, details Specifications General and specific conditions Instruction of the supervisor engineer

Inclusiveness of the work price The description of the item should include all the work that the unit price will take account of as will be illustrated in the following

1- Earth work The unit price should include :- Excavation in any kind of soil, rock, etc., starting at reduced level (bottom of G.B. blinding) down to bottom of foundation blinding including compacting backfill around foundations and shall be applied on layers, 200 mm thick, watered and compacted to 95 % (98%) according to modified AASHTO Density Test T-80.for the excavated foundation and removal of surplus material from site to an approved dumping area complete as per specifications. - Site Leveling. (Excavation of all Site including External Works). Cut and / or fill in any kind of soil, concrete, or asphalt; to the required Levels approved by the Engineer (Reduced Level). Including scraping of top. Any damage to the external walls, fence, etc. should be maintained without any compensations.. - Test of the soil (4 points at least) - Safety around the site, - Work according to engineer instruction and specifications

Concrete work Concrete works include: All formworks and shuttering in any form, shape and size. Making chamfered and curved edges, allowing for and making grooves and sleeves and the like; removal of forms and cleaning of all exposed tie wires and rods; making good the harmed surfaces and Supplying, Casting, vibrating and curing as per specifications. Approved additives and admixtures. Incurred costs on Concrete Mix Designs, Sample taking, testing and providing test results certificates, storing and saving of samples, and preparation of bar bending schedules and workshops. Supplying reinforcement of any grade, size and length as detailed in the drawings, storing on site including cutting, bending and fixing in position and providing all tying wires, spacers, shop drawings, testing and bar bending schedules

Concrete work (cont’d) Painting of exposed surfaces of underground reinforced concrete elements with two coats of Bituminous Emulsion. Supply of Polyethylene sheets under ground slabs. Steel bars used for alignment and fixing of reinforcement works, and extra steel added to assure proper detailing and safety. Measurement of Concrete elements shall be the net dimensions as detailed in the drawings. All recesses, openings and voids shall be deducted. Measurement shall be only for the seen surfaces of elements, overlapping and measuring items twice under separate headings shall not be allowed. Supplying and fixing of the required steel reinforcement as per drawings and specifications.

Block works Rates of Block works include All works of the bill shall be of Concrete blocks of high quality standards and as per specifications. Vertical and horizontal joints., Cement and mortar, Galvanized angles and ties., Closed end blocks at all ends, door and window jambs, reveals and the like. Concrete filling including reinforcing steel to cavities at quoins and door and window openings. Lintels and bond beams to the full length of the wall, and all needed to complete job as per drawings and specifications concrete infill and transporting, placing compacting, curing, surface finishing, protection, construction and expansion joints and all labors and materials and tests.

Block works (cont’d) Block work shall be bonded to concrete columns, wall and the like with concrete infill B250. block must be stopped in graded shape (10-15 cm from the concrete face) one 8 mm bar must cast in columns during casting with 40 cm length fixed every 42 cm horizontally, in addition to two vertical 10 mm bars.

Plastering works, includes The price shall include, all narrow widths, for taking out joints on block walls or backing concrete face for key, for making good to frames around pipes and other fittings, plastering to jambs and reveals of openings ( جانب من النافذة بين اطارها وبين السطح الخارجى للجدار ), side of columns, window sills; all of which shall be included Price shall also include Expanded metal lath, angle beads at all corners and plaster stops at opening edges, expansion joints, sills, labor, curing, erecting and dismantling of scaffoldings سقالات ), additives, pigments and all incidentals required as specified Material, workmanship, Galvanized mesh, or plastic mesh,  False ceiling from galvanized mesh and plastering (fixing mesh, covering it by 3-coats of rough plaster) reinforcement of the joints between different material as the joints between the wall and columns.

Tilling works Rate shall include preparation of surfaces under tiles, special tile peace’s for edges and the like, tile surface finishing, Plastic spacers. Pointing and cleaning and all incidental as per specifications. Supply, Install and Terrazzo Tiles, include, bedding and jointing in cement and sand mortar, pointing with white cement, required sand fill, and polishing, workmanship, and all incidental as per specifications Isolation works for kitchen and bathroom (layer of fiber glass, and bitumen layers) Marble includes connections, joints, mortar, and any other needed work. Supply and install a layer of cement and sand under marble and porcelain, ceramic, according to specification and engineer instruction. Supply and spread a layer of sand under the tiles. Any decoration works as drawings

Painting works All Paints shall be supplied to site in sealed container, as approved by the Engineer, and site mixing shall not be permitted. The Contractor rates shall include for supply of all materials, workmanship, samples, surface preparation, protection of painted surfaces, application to all heights as required of works, repair of all damaged surface, as per specification.

CARPENTRY AND JOINERY WORKS (window & doors) Sizes of carpentry works given in the Bills of Quantities are finished sizes and shall be as per Drawings. Sizes of doors and other items mentioned in the Bills of Quantities shall allow for tolerance to suit the structural openings shown in the Drawings. Wooden doors and pair of doors shall be measured in square meter for each structural opening, unless stated otherwise in the Bills of Quantities. Rates for carpentry and joinery work shall include : Shop and coordinated drawings. frames, architrave ( عارضة ), and other holders Allowance for plastering and tiling and the like. Cutting and fitting around obstructions, Bedding and painting. Grounds, blocking and backings. Plugging concrete, block work, and stone work, and making good. Ironmongery including cylindrical locks, handles, stoppers, screws, temporary fixing, re-fixing, oiling and adjusting.

STEEL AND ALUMINUM WORKS Rates for metalwork shall include for : Preparing shop drawings, Drilling, counter sinking, screwing, bolting and riveting. Sub frames, including galvanized steel frames for Aluminum windows and architrave. Gaskets, sashes, double weather strips and external and internal approved quality silicon filling around frames. Ironmonger including cylindrical locks (Union or equal), stoppers, handles, temporarily fixing, refitting, oiling and adjusting. Providing two keys for each lock. Glass and glazing including cutting to size, putty and rubber. Preparing surfaces for and painting one coat of primer before fixing. Sealing and Painting to any area or width in any location including work in multicolor and cutting in edges. All other accessories and incidentals required to execute the work.

Electrical works All items price to include Supply, Installing, Connecting and testing unless otherwise indicated, the contractor are requested to have approved full coordinated work shop drawings before starting contract activities, the price also includes all works necessary to implement electrical works in approved manner. The contractor intended to order main and final distribution panel boards according to approved manufacturer drawings. The price to include submittals, catalogs, any manufacturer instruction. The contractor should install and construct all works according to drawings, specification tender documents, and requirement of Electrical Co. Contractor should also test & submit the electrical Work to the Electricity Co. & Municipality.

PLUMBING, SANITARY AND MECHANICAL WORKS Rates shall include all fittings, fixtures, appliances and pipe laying Supply of material, workmanship, installation, testing and commissioning. Rates to include also all peaces and fittings, including by passes, floats, cleaning outlets, automatic vents, vents and stack covers, valves and non return valves and the like needed to complete works as per specifications. Insulation and painting as called for in specifications. Excavation and cutting for all pipe laying works, bedding back filling and all works connected with pipe laying. All ties, sleeves, joints, tie bolts and rods, brackets and the like. Rates to include Workshops, Coordinated and as- built drawings as approved by the Engineer

Pricing & price analysis Before construction three types of pricing : 1- cost estimate 2- pricing 3- cost analysis

Preparation of prices contractor Cost analysis pricingengineer Cost estimate

Factors affecting the pricing Raw material Workmanship, labor, sub-contractors Administration cost including direct cost as salaries, equipments, transportation..etc. and indirect cost as electricity, communication cost, banks, municipality fees,,,,etc. Unforeseen expenses & risk (3-5%) Insurances Taxes as income tax, V.A.T, Profit (7-10%)

Productivity of labor It is necessary to calculate the productivity for the work teams either worker or technicians / equipments to calculate wages, for workers / subcontractors. Productivity is measured per hour or per day.

Pricing analysis stages : Estimate the price for raw material and workmanship. Estimate the percentage of the specified work from the total project work. (work item/total work *100%) Estimate the cost of administration / management, tax, insurances, risk, and profit. Estimate the total cost for all works item. Estimate the unit price for each item.

Example: Analyze the prices, and find the unit price for the following, knowing that, 1- Administrative expenses is fixed (1000$) for project 2- Unfixed expenses / indirect (400$) 3- Insurance 200 $

IDDescription of workunitquantity 1Concrete footingsM378 2Block works for wall (20*20*24cm)M2100 3Internal plasteringM2200 4Wooden door 90*220No.10

1- Price for raw material and workmanship - Concrete footing (B250) IDDescription Raw material per m3 priceworkmanship 1- Concrete footings (B250) Concrete Steel170 Wires5 Nails, bolts2 Water1 isolation3 total Total price (NIS)471 Total price ($)134$ Total for 78 m3134*78 = 10,960 $

IDDescription Raw material per m2 priceworkmanship Block 20*20*40block12.5*2=256 Morter3 Moving the blocks 2 Joints, concrete fill 5 total356 Total price (NIS)41 Total price ($)11.7 Total for 78 m311.7*100= 1170$ Block work (20*20*40 cm)

Internal plastering IDDescription Raw material per m2 priceworkmanship Internal plasteringscaffoldingo.56 Morter4 Angles, metal grid,..etc 0.5 water0.5 total66 Total price (NIS)12 Total price ($)3.4 Total for 200 m23.4*200= 680$

Wooden doors 220*90 cm IDDescription Raw material per m2 priceworkmanship Wooden door 220*90material40050 Misce.20 total42050 Total price (NIS)470 Total price ($)135 Total for 10 doors135*10 =1350$

percentage of the specified work from the total project work IDDescriptionTotal work price% from total work 1Concrete footings (B250) % 2Internal plastering % 3Wooden door 220* % 4Block 20*20* % 5Total %

2- the cost of administration / management, tax, insurances, risk, and profit. administration expenses IDDescription fixed (1000$) variable (400$) tax (10%) Insurance (200$) risks (5%) profit (10%) Total 1 Concrete footings (B250) Internal plastering Wooden door 220* Block 20*20*

total cost for all works item IDDescriptionstage (1)stage (2)total 1.00 Concrete footings (B250) 10, , , Internal plastering Wooden door 220*901, , Block 20*20*401, ,594.70

Unit Price for each item IDDescriptionunitquantityunit pricetotal 1.00 Concrete footings (B250) m , Internal plasteringm Wooden door 220*90 no , Block 20*20*40m ,594.70