A Study on the Estimation of Resource Quantity Per Unit for Steel Bridge Construction

The major objective of this paper is to establish quantity surveying method and reasonable quantity per unit as criteria for the cost estimation of steel bridge construction. This paper investigates the tendency of the modification on the resource quantity per unit in steel bridge construction. In order to evaluate whether Korean criterion on the resource quantity per unit is proper, this research selects sample bridges, applies Korean and Japanese quantity surveying methods to them, and then compare the resource quantities for bridge construction. Korean quantity surveying method is based on types of steel, types of bridge and the weight of the steel. The resource quantity per unit is given as a criterion for each type of steel bridge. As a result, total cost of a bridge is estimated by the total weight of a steel bridge multiplied by its given resource per unit. Japanese quantity surveying method is based on the elements of a bridge. This approach reflects how complex to construct, how to weld the elements, how many elements the bridge has, etc. As a result, even same type of bridges may have different costs. This research founds, so as to reflect the characteristics of a bridge in quantity surveying, the Japanese approach can be an alternative.