Abstract
In the implementation method most contractors use conventional formwork which takes longer time. Therefore, it is necessary to use an innovation with semi-conventional system formwork method which is a combination of multiplex and hollow material. The purpose of this study is to analyze the strength of the half-system formwork, its implementation, and the operational costs of the project of 1 to 9 floors with a total area of 5,708.255m2. The data used include shop drawings and work unit prices of Surabaya City 2018. Microsoft Excel 2016 was for the calculations and Microsoft Project 2016 was for the scheduling. The calculations resulted semi-conventional formwork using wood and hollow steel of beam and slab formworks on 161 work days Rp. 2.790.745.668,86.
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