Engineering Construction Project.
Welbilt Pty Ltd has decided to tender for the construction of a widening of an existing highway bridge. A copy of the drawings is available* and you have been assigned to a planning group. This group is required to contribute to the tender process by preparing a network and report for the project. The client is providing advanced drawings has indicated that the tender will require submission of a project plan and it is likely to be a key element of differentiating between bids. They have also indicated that traffic management considerations and detailed incorporation of provisions within the project plan are likely to be a vital aspect of their final decision in awarding the contract. Notes from a preliminary meeting between Welbilt’s Chief Estimator and State Contracts Manager indicate they decided the following: • There is adequate information to prepare a bid; however, full tender documentation needs to be reviewed before final submission. • Each and all construction sequence attributes shown on the Drawings shall be followed. • Welbilt’s own forces will undertake all site work except for steel reinforcement fixing and piling. • The supply of the PSC planks will not be sub-contracted although this is usual practice. For this tender Welbilt intends to establish a casting yard on site and produce the planks using its own forces. The project plan must detail the establishment of the casting yard and the construction and supply of the planks as a “sub-project network”. • One necessary decision will be the number of steel forms that will be fabricated for use in the site casting yard. The chief estimator has indicated steel plank forms are very expensive and the minimum number practicable to meet the time requirement of the overall project should be used. By implementing 10 to 12 hours of steam curing it is anticipated that a plank can be demoulded 20 hours after casting. Given the importance the chief estimator places on this decision you must ensure that the number of forms and supporting rationale is clearly set out in your documentation of assumptions. • The site will generally work a six-day week. • The supply of elastomeric bearing strips will be let to Bboys Ltd. The strips can be delivered 8 weeks after placement of order. • The manufacture of the traffic barrier railing will be let to FeFab Pty Ltd. FeFab has provided a supply and fabrication quotation for railing which is competitive. The railing should be available 7 weeks after order confirmation. • Fabsteel Pty Ltd can supply the protection angle steelwork at an attractive price, but delivery cannot be made for 6 weeks. Rippa-fab Industries have offered a very expensive price for the same items but are able to match any program requirements. • Minor steel items can be supplied by several companies. Generally, 3 weeks notice is adequate for timely supply. • Rippa-fab Industries can supply bolts, dowels, etc virtually on demand. • Small cranage will be available on site; however, 5 weeks notice is required for the large crane needed to erect the planks. • Discussion with subcontractors for potential supply of cut and bent to shape reinforcing bars and for premixed concrete are being finalised. The discussions indicate that these items can be scheduled as available on demand. • Welbilt will have a foreperson and its own team of formwork carpenters on site. The carpenters can assist with the erection of planks and the pouring of concrete if required. • Welbilt will sub-contract out steel fixing. • The piling work will be sub-contracted to Ottopiling Pty Ltd, who will take 5 weeks to establish on site and then take 2 weeks to construct the piles. • The project plan must ensure that the carpenters and steel fixers are not idle for long periods of time. • The project plan must incorporate the key aspects of traffic management. • The company’s experience is that the client expectsrigid adherence to formwork minimum stripping times. The specification sets stripping times for formwork as follows: Vertical faces 3 days Soffits of headstocks 9 days Parapets 4 days ****Provide the following sections done for the report : ** 1- Identification and detailed description of the project activities. Cost estimates and detailed resource information is not required. 2- A full discussion of any assumptions made in the development of the network. It is anticipated that some initial assumptions will be based on broad resource issues to allow a practical plan to be developed without going through the process of detailed resource levelling. 3- Some comment on the relevance of your work for the preparation of the tender. 4- A discussion of the suitability of the network for the planning and control of the project if Welbilt is the successful bidder and is awarded the contract. 5- brief discussion of the factors most significant in controlling completion time. Resource levelling and financial analysis is not required.