Extrapolasi is a peer-reviewed journal, published by Civil Engineering Department of Universitas 17 Agustus 1945 Surabaya. Extrapolasi is a journal that concerned with all aspect of civil engineering, such as :Building Materials and Structures, Constructions Technology, Constructions Management, Road and Bridge Engineering, Earthquake Engineering, Geotechnical Engineering, Hydraulic Structures and Drainage, Structural Engineering, Surveying and Geo-Spatial Engineering and Transportation Engineering.