Abstract

A unitary steel joist includes a generally vertical web, a generally horizontal bottom flange, a generally horizontal top flange, a bottom wing, a bottom web portion, a top wing and a top web portion. The generally horizontal bottom flange extends outwardly on each side of the web. The bottom flange is made of two pieces of steel. The generally horizontal top flange extends outwardly on each side of the web. The top flange is made of two pieces of steel. The bottom wing extends outwardly from the web. The bottom web portion extends between the bottom flange and bottom wing. The top wing extends outwardly from the web. The top web portion extends between the top flange and the top wing. The unitary steel joist is made from a unitary piece of steel.

IPC Classes  ?

• E04C 3/04 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal
• E04B 1/24 - Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal

Abstract

An upper chord bearing joist comprising a top chord member and a bottom chord member, each having a flange portion and a web receiving portion including two web receiving tabs, each made from a unitary piece of metal; a generally planar steel web, a portion of the web being attached to the top chord member and to the bottom chord member, wherein a top portion of the web is between the two web receiving tabs of the top chord member and a bottom portion of the web is between the two web receiving tabs of the bottom chord member; and a first and second pair of support members, each support member including a shoe portion, a web attaching portion, and an angled portion, the web attaching portion portion being attached to the web receiving tabs and the angled portion being in contact with the web. The joist may be cambered, have reinforcement stiffeners, and have a rotatable joint at either end. The joists may be used in composite with concrete or with wood.

IPC Classes  ?

• E04C 3/06 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal with substantially solid, i.e. unapertured, web
• E04B 1/24 - Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal

Abstract

The present invention relates to a cold rolled steel beam comprising: a web having two layers of steel, the web having a top end and a bottom end; a pair of bottom flanges extending outwardly from the bottom end of the web; and a pair of top flanges extending outwardly from the top end of the web, each top flange having two layers of steel. Preferably, a portion of each bottom flange has two layers of steel, and the cold rolled steel beam includes a pair of end connectors extending generally orthogonally from the web and positioned generally orthogonally to the bottom flanges and the top flanges. Preferably, the cold rolled steel beam is cold formed from a unitary piece of sheet steel.

IPC Classes  ?

• E04C 3/07 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
• B21H 7/00 - Making articles not provided for in groups , e.g. agricultural tools, dinner forks, knives, spoons
• B62D 25/20 - Floors or bottom sub-units
• B62D 63/08 - Component parts or accessories
• E04B 1/24 - Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
• F16S 3/00 - Elongated members, e.g. profiled membersAssemblies thereofGratings or grilles

Abstract

The present invention is a light steel framed metal joist including an adjustable connector fastened to the joist web that allows one to adjust the length and angle of the joist when attaching to floor and wall systems. The adjustment allows one to install end connectors onto the joists prior to installation while retaining flexibility of orientation during construction. The joist functions in both web bearing and bottom chord bearing configurations. A flat plate distributing member allows one to design a floor system without having to coordinate the positioning of the joist with wall studs. Angle or U shaped members can be fastened to the lower portion of the flat plate distribution member to support joists during construction. The invention further provides a seamless fire stopping system with consideration for acoustic dampening.

IPC Classes  ?

• E04C 3/08 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal with apertured web, e.g. with a web consisting of bar-like componentsHoneycomb girders
• E04C 3/06 - JoistsGirders, trusses, or truss-like structures, e.g. prefabricatedLintelsTransoms of metal with substantially solid, i.e. unapertured, web
• E04C 5/065 - Light-weight girders, e.g. with precast parts
• E04C 5/18 - Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of metal or substantially of metal