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
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 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.
대표청구항▼
1. An upper chord bearing joist comprising: a top chord member being cold-formed from a unitary piece of sheet steel and having: a flange portion, a web receiving portion including two web receiving tabs, and a pair of integral inner flange portions, each inner flange portion extending substantially
1. An upper chord bearing joist comprising: a top chord member being cold-formed from a unitary piece of sheet steel and having: a flange portion, a web receiving portion including two web receiving tabs, and a pair of integral inner flange portions, each inner flange portion extending substantially perpendicularly from one of the web receiving tabs so as to be in a spaced relationship to the flange portion;a bottom chord member being cold-formed from a unitary piece of sheet steel and having a flange portion and a web receiving portion including two web receiving tabs; anda generally planar solid 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, said top portion defining a top surface area of contact, and said bottom portion defining a bottom surface area of contact, the generally planar solid steel web having a top surface and a bottom surface;wherein the top surface and bottom surface of the web extend substantially straight, and each chord member is cambered about the web such that the top and bottom surface area of contact varies along a length of the joist. 2. The upper chord bearing joist of claim 1 wherein the top surface area of contact in a center of the joist is less than the top surface area of contact in the first and second end of the joist. 3. The upper chord bearing joist of claim 1 wherein the generally planar steel web is a generally elongate planar rectangular sheet of steel metal. 4. The upper chord bearing joist of claim 3 wherein the generally planar steel web has a stiffening extension extending from one of: a first end of the web, a second end of the web, and both a first end of the web and a second end of the web. 5. 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 solid 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 the generally planar solid steel web has a front planar face, a back planar face, a top surface and a bottom surface;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 being attached to one of the front planar face and the back planar face of the generally planar solid steel web, whereby the first pair of support members is attached to a first end of the joist and the second support member is attached to a second end of the joist; andwherein the top surface and bottom surface of the web extend substantially straight, and each chord member is cambered about the web such that the surface area of contact varies along a length of the joist. 6. The upper chord bearing joist of claim 5 further including at least one reinforcement member attached to one of: the top chord member, the bottom chord member, and the web. 7. The upper chord bearing joist of claim 5 wherein the flange portion of the top chord comprises an upper bearing portion integrally formed with at least one lower bearing extension to produce a rigid member, the upper bearing portion being in a spaced relationship from the at least one lower bearing extension. 8. The upper chord bearing joist of claim 5 wherein the flange portion of the top chord is substantially rectangular in cross-section. 9. The upper chord bearing joist of claim 5, wherein the flange portion of the top chord member has an upper bearing portion integrally formed with at least one lower bearing extension to produce a rigid member, the upper bearing portion being folded over the least one lower bearing extension. 10. The upper chord bearing joist of claim 9 wherein the rigid member has at least one bend along its length. 11. The upper chord bearing joist of claim 10 wherein the at least one bend is at least two trough-shaped bends. 12. The upper chord bearing joist of claim 9 wherein the rigid member has a first and second edge opposite from one another, and wherein the first and second edge are each bent to form a first and second bent portion. 13. The upper chord bearing joist of claim 9 wherein each bent portion is substantially perpendicular to a remaining portion of the rigid member. 14. The upper chord bearing joist of claim 5 wherein the flange portion of the top chord supports an elongate wooden member along the length of the top chord member. 15. The upper chord bearing joist of claim 14 wherein the flange portion of the top chord member contacts at least a bottom surface, a left surface, and a right surface opposite the left surface, of the elongate wooden member. 16. The upper chord bearing joist of claim 14 wherein the flange portion of the top chord member contacts a substantial portion of the bottom surface, left surface, and right surface of the elongate wooden member. 17. The upper chord bearing joist of claim 14 wherein the elongate wooden member has at least one groove along the length of the wooden member, and wherein the flange portion of the top chord member has a portion inserted into said at least one groove.
Taylor John W. R. (33887 Gilmour Drive Abbotsford CAX V2S 6B4) Palmer John M. (6570 - 148th Street Surrey CAX V3S 3C6) Butkovsky Emanuel (202 - 1111 Haro Street Vancouver CAX V6E 1E3), Bracing system.
Rattini, Thomas L., Elongate structural member comprising a zigzag web and two chords wherein one chord comprises a channel with inwardly directed lips on the channel ends.
Daley Leigh Brian,AUX ; Height Trevor Maxwell,AUX ; Crossingham Brian Roy,AUX ; Styan Andrew Thomas,AUX, Method of increasing the yield strength of cold formed steel sections.
Thomas ; Jr. William G. (1718 Castlerock Houston TX 77090) Gussett John C. (11807 Dover Houston TX 77031) Stevenson Clarke H. (1006 Lodge Hill Houston TX 77090), Open web Z-shaped structural metal beam.
Meyer Dolph A. (4 Marook Street Carlingford ; New South Wales AUX 2118) Sardjono Wyatmodjo (29 Edward Street Ryde ; New South Wales AUX 2112), Roof truss and beam therefor.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.