Fire retardant shaft wall

Claim 2

A wall, readily assembleable from one side and suitable for construction where the second side is relatively inaccessible, comprising a plurality of spaced apart vertically disposed elongate, formed sheet metal studs, each said stud being formed from a single sheet of sheet metal, gypsum boards on the said one side of said wall screw attached to the outer surface of a single solitary flat screwable portion of each of said studs, said flat screwable portion of each said stud facing said one side of said wall, and gypsum boards on said second side of said wall affixed against the inner surface of a pair of oppositely directed flanges, said oppositely directed flanges being formed from an elongate portion of said sheet metal which extends in width from the outer edge of one of said flanges to the outer edge of the opposite said flange, said oppositely directed flanges forming the second side of said stud on the said second side of said wall, and portions of single thickness of said sheet metal stud adjoining said flat screwable portion on said one side and said oppositely directed flanges on said second side.

Claim 3

A wall comprising a plurality of spaced-apart, vertically disposed, elongate, formed sheet metal studs and a plurality of gypsum boards affixed to said studs, said boards and said studs forming a wall which is suitable for erection from a first side without need for anyone on the opposite side, said studs each being formed from a single sheet of sheet metal and having a web formed from a single thickness of said sheet metal disposed substantially perpendicular to the plane of the wall, said studs each having a single solitary flange extending parallel to the plane of the wall from the edge of said web forming one side of said stud on said wall first side, said studs each having a pair of oppositely directed elongate flanges disposed in a plane parallel to the plane of the wall, said pair of flanges forming the opposite side of said stud, means joining said three flanges to said web, a first series of coplanar gypsum boards having lateral edge portions disposed against, and supported by the inner surface of said oppositely directed flanges of said studs, means for holding said lateral edge portions against said oppositely directed flanges and a second series of coplanar gypsum boards disposed against and supported by the outer surface of said single flanges of said studs.

Claim 4

A wall comprising a plurality of spaced-apart, vertically disposed, elongate, formed sheet metal studs and a plurality of gypsum boards affixed to said studs, said boards and said studs forming a wall which is suitable for erection from a first side without need for anyone on the opposite side, said studs each being formed from a single sheet of sheet metal and having a web formed from a single thickness of said sheet metal disposed substantially perpendicular to the plane of the wall, said studs each having a single solitary flange extending parallel to the plane of the wall from the edge of said web forming one side of said stud on said wall first side, said studs each having a pair of oppositely directed elongate flanges disposed in a plane parallel to the plane of the wall, said pair of flanges forming the opposite side of said stud, means joining said three flanges to said web, a first series of coplanar gypsum boards having lateral edge portions disposed against, and supported by the inner surface of said oppositely directed flanges of said studs, means for holding said lateral edge portions against said oppositely directed flanges and a second series of coplanar gypsum boards disposed against and supported by the outer surface of said single flanges of said studs.

Claim 5

The wall of claim 2 wherein said web includes a substantially flat portion which extends between a pair of lateral edges of coplanar gypsum boards of said first series, said flat portion being substantially perpendicular to the plane of the wall and having a width substantially greater than the thickness of said gypsum boards of said first series, said stud being formed to permit insertion and removal of one of said pair of lateral edges of one gypsum board while said opposite lateral edge of said one gypsum board is disposed against one of the pair of flanges of an adjacent stud.

Claim 6

A wall cOnstruction as defined in claim 2 wherein the side of said wall with said first series of coplanar gypsum boards is adjacent an elevator shaft.

Claim 7

A wall construction as defined in claim 2 wherein said studs are formed from a single elongate sheet of steel of about 24 gauge and said pair of oppositely directed flanges being formed from an elongate portion of said sheet metal which extends in width from the outer edge of one of said flanges to the outer edge of the opposite said flange.

Claim 8

A wall construction as defined in claim 2 wherein said web is all in a single plane perpendicular to the planes of said flanges.

Claim 9

A wall construction as defined in claim 2 wherein said web comprises two portions, one portion being adjacent and perpendicular to said oppositely directed flange and the other portion being adjacent and acutely angled to said single flange.

Claim 10

The wall construction of claim 2 wherein said studs are disposed at about two foot spacings and said first series of coplanar gypsum boards are about two feet by one inch by room height.

Claim 11

The wall construction of claim 2 wherein said studs are disposed at about two foot spacings and said first series of coplanar gypsum boards consist of two laminated boards of about two feet by half inch by room height.