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Spiral stairs of sectional bolted construction - uses cantilever treads on standard shaft segments which connect in stepped relationship
Spiral stairs of sectional bolted construction - uses cantilever treads on standard shaft segments which connect in stepped relationship
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机译:分段螺栓连接的螺旋楼梯-在标准轴段上使用悬臂踏板,这些轴段以阶梯关系连接
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摘要
The spiral staircase of a sectional bolted construction, comprises standard segmental treads (10) cantilevering from standard string board or shaft segments (12). The two vertical opposed faces (14) of the shaft segments are symmetrically angled to the major face so as to converge on the vertical axis (16) of the staircase. Viewed in major elevation, the shaft segments may have a vertically elongated rectangular outline, comprising a plate with contiguous edge flanges (13, 14). Closed slots (18) and holes (17) in the vertical edge flanges (14) allow the segments to be bolted together in a stepped relationship, the step interval corresp. to the rise between each tread. In plan the shaft segments follow a circular path of which the axis (16) is that of the staircase, the treads comprising planks which are bolted to gusseted (20) cantilever sole plates (11).
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