| 摘要 |
A cavity shaft wall capable of withstanding pressure loading, comprising two spaced rows of wall members spaced by studs having means for engaging three vertical sides of each edge of the members comprising the row exposed to the shaft. The means preferably are provided by side flanges which open out into the stud, the flanges being bent to form pockets and being free to expand as the exposed members shrink, as in a fire. Insulating wool and electrical utilities can be accommodated in the air gap formed by the spaced rows.
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