7.H2 t. .589 cm min leading to an acceptable thickness t .6 cm This calculation assumes that the only mode of failure is compressive yielding. The assumption was made that the fittings for the window would be installed so that no tensile loads are transmitted to the glass. (Glass is extremely brittle under tension yet can withstand tremendous compressive loads.) Also, the possibility of snap through buckling of the thin glass window has been ignored. However, some justification can be given for this. The final thickness of the glass is close to 60 cm instead of the necessary 0.6 cm to provide a sufficient amount of shielding to protect the inhabitants from solar radiation. This 60 c~ thick window is then constructed in many overlapping layers of small segments joined by a steel truss work. This framework prevents buckling and the layered format prevents shattering from meteoroid impact.
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