Composite Open Web Beam-Joist and Method of Manufacture

The method of claim 1, further comprising forming a cutout in at least one of the triangular web sections.

The method of claim 2, wherein a minimal width of a portion of the at least one triangular web section surrounding the cutout is significantly greater than a thickness of the sheet.

The method of claim 7, wherein the second chord angle beam is attached to the second side of the cambered beam-joist portion at the peaks of the triangular web sections such that the second chord angle beam mirrors the first chord angle beam and is equidistant from a center of all the triangular web sections.

The method of claim 8, wherein:

• the first chord angle beam is attached to the first side of the cambered beam-joist portion at the peaks of the triangular web sections via welding;
• the second chord angle beam is attached to the second side of the cambered beam-joist portion at the peaks of the triangular web sections via a welding.

The method of claim 9, wherein the plate is vertically attached to a center of the top end of the cambered beam-joist portion via welding.

The composite open web beam-joist of claim 11, further comprising a cutout formed in at least one of the triangular web sections, wherein a minimal width of a portion of the at least one triangular web section surrounding the cutout is significantly greater than a thickness of the sheet.

The composite open web beam-joist of claim 13, wherein the plate is attached to the center of the top end of the cambered beam-joist portion with approximately 12-inch-long continuous welds on the first side of the plate and the second side of the plate at a juncture where the proximal end of the plate meets the top end of the cambered beam-joist portion, the approximately 12-inch-long continuous welds disposed at the first end and the second end of the cambered beam-joist portion.

The composite open web beam-joist of claim 14, wherein the plate further includes approximately 2-inch-long continuous welds on the first side of the plate and the second side of the plate at the juncture where the proximal end of the plate meets the top end of the cambered beam-joist portion to further weld the plate to the center of the top end of the cambered beam-joist portion, the approximately 2-inch-long continuous welds staggered 12 inches apart on the first side and the second side of the plate.

The composite open web beam-joist of claim 15, wherein the approximately 12-inch-long continuous welds and the approximately 2-inch-long continuous welds comprise a thickness of approximately 3/16 inches.

The composite open web beam-joist of claim 17, wherein:

• the first chord angle beam is welded to the first side of the cambered beam-joist portion at the peaks of the triangular web sections;
• the second chord angle beam is welded to the second side of the cambered beam-joist portion at the peaks of the triangular web sections.