| 摘要 |
A spiral stairway (10) includes a center support pole (14), a plurality of steps (16), and an adjustable pitch railing assembly (12). The steps (16) are attached at a narrow end (22) to the center support pole (14) and at a peripheral end (24) to the railing assembly (12). The railing assembly (12) includes an upper railing (38), a lower railing (36), and a plurality of pickets (32). Each railing (36), (38) includes a continuous channel (54) formed along a length therein. Each picket (32) includesportions (62), preferably in the shape of a cylinder having a longitudinal axis transverse to the length of the picket (32). The railing assembly (12) further includes a plurality of inserts (34) having a length corresponding to the distance between pickets (32). The picket end portions (62) are engageable within corresponding partial circular cutouts formed within the inserts (43), and the combination is receivable in the railing channel (54). A fastener (74) fixedly secures the insert and picket end within the channel at a predefined angular orientation.
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