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Trim Loss Minimization for Construction Reinforcement Steel with Oversupply Constraints

Vacharapoom Benjaoran 1 and Sdhabhon Bhokha 2
1. School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand
2. Department of Civil Engineering, Ubonratchathani University, Ubonratchathani, Thailand.
Abstract—Construction work consumes a large amount of construction reinforcement steel and it demands this steel in various particular sizes according to structural designs. The steel have to be cut to the right sizes before uses. The cutting process creates a lot of trim loss and costly wastes. This research develops a new procedure for arranging cutting plans with minimum trim loss. The procedure is based on the optimization of one dimensional cutting stock problem. A set of efficient cutting patterns is generated first and then the cutting replications are determined from the optimization. The problem model has oversupply constraints which do not allow cutting any item more than the demanded pieces. Few remaining undersupplied items are lastly cut using the best fit decreasing algorithm. Therefore, the cutting plans created from this procedure will not make any oversupply which becomes waste and they will cut all pieces exactly as demanded. Test results indicated that this developed procedure could produce low trim-loss cutting plans. Also, the suitable number of efficient cutting patterns and the suitable allowable trim loss of the patterns could help result good cutting plans.

Index Terms—cutting plan, trim loss, steel bar, reinforcement steel, minimization

Cite: Vacharapoom Benjaoran and Sdhabhon Bhokha, "Trim Loss Minimization for Construction Reinforcement Steel with Oversupply Constraints," Journal of Advanced Management Science, Vol. 1, No. 3, pp. 313-316, September 2013. doi: 10.12720/joams.1.3.313-316
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