• (UOM) for civil engineering works : Units of Measurement – Very Important

    by  • April 3, 2014 • Articles, Editorial • 0 Comments

    The units of measurements (UOM) for civil engineering works are mainly categorised for their nature, shape and size and for making payments to the contractor and also. The principle of units of measurements normally consists the following:

    a) Single units work like doors, windows, trusses etc., are expressed in numbers.

    b) Works consists linear measurements involve length like cornice, fencing, hand rail, bands of specified width etc., are expressed in running metres (RM).

    c) Works consists areal surface measurements involve area like plastering, white washing, partitions of specified thickness etc., and are expressed in square meters (m2).

    d) Works consists cubical contents which involve volume like earth work, cementconcrete, Masonry etc are expressed in Cubic metres.

    Table below shows units of measurement of various items of civil engineering works based on IS 1200.

    Sl. No.

    Particulars of item

    Units of measurement

    Units of payment

    1 Earthwork    
      1.       Earthwork in excavation CUM Per CUM
      2.       Earthwork in filling in foundation trenches CUM Per CUM
      3.       Earth work in filling in plinth CUM Per CUM
    2 Concrete    
      1.       Lime concrete in foundation    
      2.       Cement concrete in lintels    
      3.       RCC in slab    
      4.       Cement concrete or RCC in chujja, sunshade    
      5.       Lean concrete in roof terracing (thickness specified) SQM Per SQM
      6.       Cement concrete bed CUM Per CUM
      7.       Reinforced concrete sunshade (specified width and height) CUM Per CUM
    3 Damp proof course (DPC) – thickness mentioned SQM Per SQM
    4 Brick work    
      1.       Brickwork in foundation CUM Per CUM
      2.       Brickwork in plinth    
      3.       Brickwork in super structure    
      4.       Thin partition walls SQM Per SQM
      5.       Brickwork in arches CUM Per SQM
      6.       Reinforced brickwork CUM Per CUM
    5 Stone work    
      1.       Stone masonry CUM Per CUM
    6 Wood work    
      1.       Doors and windows frames or chaukhats, rafters, beams CUM Per CUM
      2.       Shutters of doors and windows (thickness specified) SQM Per SQM
      3.       Doors and windows fittings (like hinges, tower bolts, sliding bolts, handles) Earch Per Each
    7 Steel work    
      1.       Steel reinforcement bars etc in RCC and reinforced brick work Quintal Per Quintal
      2.       Bending, binding of steel reinforcement Quintal Per quintal
      3.       Rivets, bolts and nuts, anchor bolts, lewis bolts, holding down bolts Quintal Per quintal
      4.       Iron hold fasts    
      5.       Iron railing (height and types specified)    
      6.       Iron grills SQM Per SQM
    8 Roofing    
      1.       RCC and RB slab roof (excluding steel) CUM Per CUM
      2.       Lean concrete roof over and inclusive of tiles or brick or stone slab etc (thickness specified) SQM Per SQM
      3.       Centering and shuttering formwork SQM Per SQM
      4.       AC sheet roofing SQM Per SQM
    9 Plastering, points and finishing    
      1.       Plastering – cement or lime mortar (thickness and proportion specified) SQM Per SQM
      2.       Pointing SQM Per SQM
      3.       White washing, colour washing, cement washing, (number of coats specified) SQM Per SQM
      4.       Distempering (number of coats specified) SQM Per SQM
      5.       Painting, varnishing (number of coats specified) SQM Per SQM
    10 Flooring    
      1.       25mm cement concrete over 75mm lime concrete floor (including lean concrete) SQM Per SQM
      2.       25mm or 40mm cement concrete floor SQM Per SQM
      3.       Doors and window sills (CC or cement mortar plain) SQM Per SQM
    11 Rain water pipe / plain pipe RM Per RM
    12 Steel wooden truss Each Per each
    13 Glass panels (supply) SQM Per SQM
    14 Fixing of glass panels or cleaning Each Per Each

    Note:

    • SQM = Square meter
    • CUM = Cubic meter
    • RM = Running meter

    Methods for Measurement of civil engineering works:

    The rules for measurement of each item are invariably described in IS – 1200. However some of the general rules are listed below:

    1. Measurement shall be made for finished item of work and description of each item shall include materials, transport, labour, fabrication tools and plant and all types of overheads for finished the work in required shape, size and specification.

    2. In booking, the order shall be in sequence of length, breadth and height or thickness.

    3. All works shall be measured subject to the following tolerances.

    • Linear measurement shall be measured to the nearest 0.01m.
    • Areas shall be measured to the nearest 0.01 SQM
    • Cubic contents shall be worked out to the nearest 0.01 cum.

    4. Same type of work under different conditions and nature shall be measured separately under separate items.

    5. The bill of quantities shall fully describe the materials, proportions, workmanships and accurately represent the work to be executed.

    6. In case of masonry (stone or brick) or structural concrete, the categories shall be measured separately and the heights shall be described as:

    • From foundation to plinth level
    • From plinth to first floor level
    • From first floor to second floor level and so on.

     

     

    About

    Hello, My self Neelmani, A Civil Engineer. Presently I am working with Indian Railway. An Affiliate Member of ASCE "American Society of Civil Engineers". B.Tech in Civil Engineering from MIT Muzaffarpur and Diploma in Railway from IPWE as well as Civil Engineering from Govt. Polytechnic Muzaffarpur.

    https://plus.google.com/u/0/104905955007831978613

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