| 摘要 |
This disclosure relates to an air inflatable enclosure comprising sheets of unsupported stretchable plasticized polyvinyl chloride or polyvinyl acetate plastic sheet, having a thickness of between about 10 to 20 mils, in combination with (1) a plurality of spaced, parallel non-stretchable reinforcing strips or webs of material fused to at least a portion of the roof surface of the plastic sheet material, the ends of the non-stretchable parallel strips being anchored to decking or to other base material (such as earth and the like) for stability and provided with (2) a reinforcing grid pattern formed, at least between each of said spaced, parallel strips, the grid pattern being constructed of heavier stretchable vinyl strips fused to the vinyl sheet material.
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