| 摘要 |
<p>A geometric-tree like gymnastic amusement-thrill structure (10) efficiently based upon a central ground-anchored vertical trunk-pylon member (15) employing a preferably four-way arrangement of radially upward and outwardly extending branch support-booms (11', 12', 13', 14'), each in discreet combination with a laterally supporting ground-anchored beam extending upwar d to a point proximal the base of its respective support-booms. Plus, nearly vertical compression-load beams (16, 17, 18, 19) are secured at their lower- ends near each support-boom's lower terminus, and secured at their upper-end s near the outer ends of the respective overhanging support-boom. This X-shape d structure is additionally secured in rigid stance via a plurality of strategically placed triangulated tension-cables (33') extending upward at a n angle from proximal the ground anchoring point of the lateral ground-anchore d beams to a point well up on the support booms. The structure also includes separate bungee-cords (23) which are strung between the outer distal ends of each support-boom.</p> |
