Administration Manual - B.E.S.T. Undertaking.

2.7.1 (a) For Footings:
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(i) Actual depth of excavation in respect of footings is measured
vertically from original ground level to bottom.
(ii) Length and breadth: i.e. area of excavation is measured as per
size of the bottom concrete course.
(iii) We now have at (i) (above) the depth and at (ii) (above) the length
and breadth of excavation. With these known factors i.e. length x
breadth x depth (= height) we arrive at the cubic contents of the
excavation according to which payment for excavation is made.
2.7.2 For Plinth beams:
(i) Actual depth of excavation for plinth beams is measured from the
ground level to the bottom of beam.
(ii) For the purpose of width, the width as per drawing is adopted and
not the actual width of excavation which is always more. The
minimum width for Plinth is as per drawing and it is ensured by
Actual measurement and even if the actual width is more, the same
(extra width i.e. actual width less width as per drawing) is to be
ignored for purposes of payment.
(iii) For the purpose of length of the beam, it is to be noted that the
portions of the two footings on which the beam rests and for which
measurements have already been recorded for excavations, are
excluded when working out the excavation of length for the beam.
We have available now at (i) (above) the depth, at (ii) the width and at
(iii) the length. Therefore, length x width (breadth) x depth (height)
gives the cubic contents of the excavation for plinth beam according
to which payment is made.
2.8 CEMENT CONCRETE PLAIN AND REINFORCED:
2.8.1 Reinforced cement concrete involves Steel Bars within whereas Cement
concrete plain does not have steel bars. In reinforced cement concrete
various sizes of steel bars admeasuring 5 mm, 10 mm, 12 mm, 16 mm, 20
mm, 22 mm
and 25 mm, as indicated in drawings are used. That correct sizes as per
drawing are used is checked by inspection at the time of taking
measurements.