Fig. 4. A typical block of ORS. Fig. 5. Partial cross-sectional view of a typical block. A block as shown in Fig. 4 is composed of double decks of honeycomb shape and 16 buoyant floats. The space in between the decks is utilized for cable installation, transportation, storage, etc. The honeycomb decks are selected to allow solar light to reach the ocean surface. The decks are made of steel and can withstand possible loadings on them. The clearance between the decks is to be 3 m. On the upper decks are rectenna antenna arrays which are arranged in such a manner that their longitudinal center line is 25 m in interval. The rectenna array is in a block 16.3 m (width) x 200 m (length) x 2 sets whose elevated angle at 35 deg N lat is to be 49.4 deg. The configuration of a typical block and its partial cross section are shown in Figs. 4 and 5. To estimate the static wind, current and wave loads on an ORS structure, the following design parameters were used: 1) uniform load = 300 kg/m2, 2) float displacement = 458 tons, 3) weight of float = 130 tons, 4) projectional area of float = 98
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