METHOD OF MEASUREMENT- REINFORCED/PLAIN CEMENT CONCRETE (CAST IN SITU)- AS PER IS 1200-PART-II

DIMENSIONS-

  • Dimensions shall be measured to nearest 0·01 m except for the thickness of slab which shall be measured to nearest 0·005 m.
  • Areas shall be worked out to nearest 0·01 square metre. 
  •  Cubic contents shall be worked out to nearest 0·01 cubic metre.
STAGE OF MEASUREMENT-

Work shall be measured under the following categories in convenient stages stating the height or depth: 
  • Below ground/datum level. 
  • Aboveground/datum level. 

NOTE- The ground/datum level shall be dcfined in each case.

CEMENT CONCRETE WORKS

Concrete works shall be measured under the following categories. 
  • Works in plain/reinforced/prestressed concrete shall each be measured  separately. 
  • Works in precast and cast in situ concrete shall be kept separate.
Unit of Measurement-Unless otherwise stated all concrete work shall be measured in cubic metres.

DEDUCTION-No deduction shall be made for the following-
  • Ends of dissimilar materials for example, beams, posts, girders, rafters, purlins, trusses,corbels and steps up to 500 cm2 in cross section.
  • Opening up to 0-1 m2 or as specified; 
  • Volume occupied by reinforcement; 
  • Volume occupied by pipes, conduits, sheathing, etc, not exceeding 100 cm2  each in cross-sectional area or as specified;
  • Small voids, such as the shaded portions in Fig. I, when these do not exceed 40 cm2  each in cross-section; 


  • Moulds, drip moulding, chamfers, splays rounded or coved angles, beds, grooves and rebates up to 10 cm in width or 15 cm in girth and Stops, mitres, returns, rounded ends, junctions, dishings, etc, in connection with linear or super labours.
  • In calculating  area of an opening, the thickness of any separate lintel or sill shall be included in the height. No extra labour for forming such opening or voids shall be meuured.
METHOD OF MEASUREMENT FOR REINFORCED/PLAIN CEMENT CONCRETE (CAST IN SITU)- 
  • Columns shall be measured from top of column base to under side of first floor slab and subsequently from top of floor slab to underside of floor slab above.
  • In case of columns for flat slabs, flare of column shall be included with column for measurement.  
  • Beams shall be measured from face to face of columns and shall include haunches, if any, between columns and beams. The depth of beams shall be measured from bottom of slab to bottom of the beam except in case of inverted beam where it shall be measured from top of slab to top of beam. 
  • Conerete in CHAJJAS- When CHAJJA is combined with beam on lintel the common portion shall be measured as CHAJ1JA. when CHAJJA is in continuation of roof or suspended slab it shall be measured up to central line of bearing.




  • Whenever vertical fins and CHAJJAS are combined, CHAJJAS shall be measured clear between fins. The vertical fins shall be measured through.


  • Dissimilar Materials: The most common example is a composite beam, which consists of a steel beam connected to a concrete slab. The concrete provides compressive strength and stiffness, while the steel provides tensile strength and ductility.
  • Connection: The "ends of dissimilar materials" are the shear connectors (e.g., headed studs) that are welded to the top of the steel beam and embedded in the concrete slab. These connectors ensure that the two materials act as a single, monolithic unit.


Blog by- Er. Navneet kumar


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