US 4,394,807 AGranted

Sheet metal structural shape

OwnerFrank E. Carrollinventor

Life of this patent

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Abstract

A one-piece rollformed sheet metal structural shape for use in building construction, the shape being a generally triangular closed shape having mounting flanges extending outwardly at the bottom of the triangular shape and stiffening flanges extending outwardly from the opposite end of the shape, the stiffening flanges having a projection extending from the outer extremity of at least one of the stiffening flange(s) for increased stiffness. The stiffening projections may turn over or turn under or overlap the stiffening flanges for increased stiffness, prevention of moisture entering the interior of the shape, and securement of the stiffening flanges to each other providing greater strength to the shape.

Claims18

Dependent claims

A rollformed sheet metal structural shape fabricated from a single sheet of metal for use in building construction, said shape being substantially symmetrical about a vertical bisecting plane, said shape comprising

two symmetrical legs extending from a point in said plane at the top of said shape downwardly, said legs extending away from said plane forming an included angle of about 30.degree. to about 90.degree. between said legs, said legs having a vertical height of about 11/8 to about 10 inches;
a mounting flange generally perpendicular to said plane extending outwardly from the lower extremity of each of said legs;
a stiffening flange generally perpendicular to said plane extending outwardly from each of said legs at said point;
said stiffening flanges being narrower than the distance between the outer extremity of said mounting flanges and having a projection extending from the outer extremity of at least one of said stiffening flange(s) for increased stiffness;
and
a closure extending across the bottom of said shape from the outer extremity of each of said mounting flanges.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/245,902Filed 20 Mar 1981 · continuation in part
Priority: 4 Apr 1974
Granted: 26 Jul 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

E04B 7/00
Roofs
E04C 3/07
With substantially solid, i.e. unapertured, web: at least partly of bent or otherwise deformed strip- or sheet-like material
E04D 13/1606
Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof…:…
E04C 2003/0421
Characterised by assembly or the cross-section: comprising one single unitary part

Family

Serial457,996Parent of this continuation-in-part · filed 4 Apr 1974
Serial648,500Parent of this continuation-in-part · filed 12 Jan 1976
Serial762,778Parent of this continuation-in-part · filed 25 Jan 1977
Serial943,866Parent of this continuation-in-part · filed 19 Sep 1978
US 4,114,335 AParent of this continuation-in-part
US 4,048,777 AParent of this continuation-in-part
US 3,965,641 AParent of this continuation-in-part
US 4,394,807 AThis patent

From the US filing history. Foreign family members aren’t listed.

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