| 摘要 |
The present invention relates to staircase structures and in particular provides a staircase structure in which the components may be substantially prefabricated and erected on site. Standardized components are generally used whereby labor is minimized while the staircase is adjustable for various slopes. The structure basically comprises a pair of stringers, each formed of upper and lower shafts which are movable longitudinally with respect to each other and can be spaced apart. Tread supporting members extend between the upper shafts and lower shafts for receiving the tread members.
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