Page 73 - Civil Engineering Project Management, Fourth Edition

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Year 2
Year 1
Manufacture
Erect
Design and drawings
T
1. Civil Engineering Project Management Year 3 Comm Test
Wiring
2. T
Manufacture
3. T Supply
Manufacture
4. T Supply
2 months safety margin on time
Manufacture – do. – First buildings ready All buildings ready
5. T Erect Start delivery – do. – Complete delivery Substantial completion
Civil wks
6. T Civil wk
7. T Civil construction Works
Finishing
sub – c
Manufacture
8. T Test Del Install Comm Test
9. Install Test
T Tendering period
Contract No.
1. Process plant 4. Pipe supply 6. Site preparation
Electrical subc. 5. Swing bridge 7. Main civil works
2. Site investigations Plant 8. Pumping plant
3. Valve supply Civil subc. 9. Instrumentation
Fig. 5.1. Planning the co-ordination of contracts for a water supply project

the cost of getting the construction contractor to temporarily store some plant
on site – will be less than the cost of delaying construction.
An alternative is for the employer to pass to the construction contractor the
responsibility for arranging delivery of plant as he needs it. This was done on
the Mangla dam project in Pakistan where eight major suppliers for hydro-
electric plant, gates, valves and other large equipment were involved. The civil
contractor was required to take over the plant supply contracts and arrange
delivery to suit his construction programme, after such plant had been tested
to the satisfaction of the employer. This kind of approach, however, is only
practicable where the project is so large, as at Mangla, that construction takes
several years to complete.

Site preparation contracts

An employer may also let a separate civil engineering contract for site-
preparation, which covers building of access roads, bulk excavation, and pro-
viding electrical, water, and sewerage services to the site. Housing for site