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US 4,047,355 AGranted
Shaftwall
AssigneeStudco, Inc.
InventorWilliam L. Knorr
Life of this patent
Estimating the term…
Abstract
I-beam studs of sheet metal have overlapped shaftwall portions having holes to provide for flow of cooling air along the overlapped portions to prevent failure of the studs from fire. First drywall sheets are mounted in the studs on the shaftwall sides thereof, and second drywall sheets are secured to the studs at the corridor sides thereof.
Claims15
In a shaftwall,
- a plurality of vertical studs of sheet metal,
- each stud having at one side thereof an inner flange and an outer flange folded back on and spaced from the first flange to form a thin, vertical passage open at the top and one side,
- the inner and outer flanges being parallel to each other and overlapping portions thereof forming a double thickness flange,
- the overlapping portions of the second flange having an opening therethrough into the space between the flanges,
- the openings being spaced low on the studs to admit air into the passages,
- and gypsum boards secured to the other side of the studs.
3 more elements
A vertical sheet metal stud including:
- a web,
- an inner flange joined to and extending laterally substantially at right angles to the web,
- and an outer flange joined to and folded back to a parallel position over the inner flange to overlap the inner flange and spaced slightly from the inner flange to define an air passage therebetween, the overlapping portion of the outer flange having an opening therethrough to the air passage,
- the opening being spaced downwardly from the upper end of the air passage.
1 more element
Dependencies are inferred from the claim text.