ANSWER TO SELF-ASSESSMENT EXERCISE IN CHAPTER 5:
ESTIMATE LONDON ROAD RC FRAME
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Estimating and Cost Planning Using the New Rules of Measurement, First Edition. Sean D.C. Ostrowski.
© 2013 John Wiley & Sons, Ltd. Published 2013 by John Wiley & Sons, Ltd.
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ANSWER TO SELF-ASSESSMENT EXERCISE: CHAPTER 5...
All the work to be included in Group Element 2 Superstructure and Element 1 Frame
(Reference, item 2.1) are shown on NRM, p. 22 and are to be measured in square metres
as NRM, p. 274. Item 2.1.1 indicates that the area is that related to the frame. This excludes
any basement area.
The rates must also include the cost of formwork and reinforcement. Further measurement of the formwork and reinforcement and further conversions will be necessary to
provide a gross rate per metre for the concrete, formwork and the reinforcement.
The measurement and costing of the steel frame to the conference area must also be
included in this section.
Table A7.1 Conversion of frame measurement to a superficial measurement.
2.1 Frame (NRM, p. 28)
Columns
108 m3
× £125/m3
13,500
Beams
146 m3
× £125/m3
18,250
11 t
× £2,000/t
22,000
Steelwork
Protection to steel
Say
4,000
Formwork to columns
1,148 m2
× £30/m2
34,440
Formwork to beams
1,462 m2
× £50/m2
73,100
5.08 t
× £2,000/t
10,160
Reinforcement
175,450
Upper floors: 4,574 (GIFA) – 595 (Basement) = 3,979 m2
GIFA floor area for the upper floors
÷ 3,979 m2
Rate per square metre
= £44/m2
NRM Method of measurement for the
estimate of the RC frame
3,979 m2
× £44/m2
= £175,076
Measuring and pricing the individual items of work enables an accurate quantity to be
provided. The price for this measured work is also specific and therefore more accurate.
The precise price per square metre can then be calculated. The same quantities also
provide the basis for the measure of the cost planning elements of work.