Question

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3. The set of activities to be considered in the plan of a subcontractor for the construction of a concrete foundation is as follows: Activity Depends on E, K1, K2, N. Description Site Handover Mobilization Layout of spread footings Earth excavation Obtain concrete Place concrete Obtain steel reinforcement Cut and bend reinforcement (part 1) Cut and bend reinforcement (part 2) Place reinforcement (part 1) Place reinforcement (part 2) Obtain formwork Erect formwork Approvals Wait for 14 days then Remove Formwork Remove formwork Curing Cleanup Demobilization N. In this project, a crew of steel fixers is used for cutting and bending reinforcement and another crew is used for placing reinforcement. The first part of reinforcement can be placed after the formwork is erected while the second part should wait for completion of placing the first part of reinforcement. Assume that concrete will be procured after formwork is erected and that curing will take place after formwork is removed. Also, assume that the subcontractor will demobilize after cleanup is complete. Tabulate the predecessors of each activity and draw the AOA and AON networks of the work.

Answer 1

Q. Answer Given Data: Activity Depends lon E, K1, K2,N НІ H2 Description Site Handover Mobilization Layout of spread footings Earth excavation obtain concrete Place concrete Obtain steel reinforcement Cut & bend reinforcement (part 1) Cut & bend reinforcement (part 2) Place, reinforcement (part 1) Place reinforcement (part 2) Obtain formwork Erect formwork Approvals hlait for 14 days then Remone formwork Remore formwork Curing cleem up Demobilization LD K2 р T Required: Tabulate the predecessors of each activity Draw AOA and AON networks of the work.

Solution : Sl. No Activity Name Predecessors. Number B M E, K1, K2, N НІ H2 K) HI MHI KL, H2 B K2 LD

AOA (Activity on Arrow) Network Diagram dummy activity dotted lines De

AON (Activity on Nocle) Network diagram

Missing predecessors of activities are filled and tabulated. (Image 2).

AOA (Activity on Arrow ) network diagram is drawn (image 3).

AON (Activity On Node) network diagram is drawn (image 4).

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