| 摘要 |
A playground swing crossbar comprises a tubular extrusion having an upper portion, preferably of polygonal transverse cross section, and a lower portion of reduced dimension which is notched at its lowermost end to receive swing hangers. A rod received within a cavity defined in the lower portion pivotally supports the hangers, and caps located at the crossbar ends restrain the rod from longitudinal displacement. Recessed flat surfaces defined on the upper portion permit leg column sockets to be readily positioned and welded to the upper portion, and an embodiment of the crossbar permits spacers to be interposed between crossbars in a swing utilizing double crossbars.
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