The impact of tidal floods in the coastal area of Semarang greatly disrupts people’s activities and damages settlements and infrastructure buildings. Floating building is one of the alternative solutions to overcome the rising sea level. This study aims to compare 2 (two) floating housing material platforms, namely EPS (Expanded Polystyrene) and PVC (PolyVinyl Chloride). The analysis method of floating structure platform was carried out by using various indicators, namely, the uplift generated, the stability and costs. Based on the findings of the analysis, the uplift platform to bear building loads on the water surface showed a value of 0.2 ton / rod for Ø10 inches PVC pipes and 4 meters in length. Then, the uplift capacity of 0.9 tons / sheet was for EPS Styrofoam with dimensions of 2 m x 1 m x 0.5 m. The stability level of floating buildings on water was indicated by the high value of spectrum that was +3.23 m for PVC and +3.61 m for EPS. To support the loads of 54.01 tons, the comparison of material expenses and installation of PVC materials required a cost of IDR. 561, 561, 350.00; meanwhile EPS material cost IDR. 40, 420, 000.00.
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