Beam to column connection
A joint connection structure of a building framework includes a column assembly including a column and a pair of gusset plates connected to the column on opposite sides of the column and extending laterally outward from the column. A beam assembly includes a beam having upper and lower flanges and an end portion received between the gusset plates. The beam assembly is bolted to the column assembly. A channel is attached to one of the column and beam to facilitate connection of the beam assembly to the column assembly. The channel defines an elongate slot for attaching the channel to said one of the column and beam.
1. A prefabricated column assembly comprising:
a column including flanges;
first bolts;
first connecting members bolted to an outer surface of one of the flanges by the first bolts such that the first connecting members contact the outer surface of said one of the flanges;
second connecting members bolted to an inner surface of said one of the flanges by the first bolts such that the second connecting members contact the inner surface of said one of the flanges;
a pair of gusset plates extending laterally outward from the column past the first connecting members at opposite ends of the gusset plates;
second bolts attaching the gusset plates to the first and second connecting members on opposite sides of the column;
wherein the second bolts include a first group of second bolts connecting the gusset plate to the first connecting member, and a second group of second bolts connecting the gusset plate to the first connecting member, the first and second groups of bolts being spaced apart from each other by a distance and free of any other second bolts between the first group and second group, the distance being greater than the separation of adjacent second bolts in the first group from each other or adjacent second bolts in the second group from each other, a space on the gusset plates between the first and second groups of second bolts being free of bolt holes; and
third connecting members attached to outer surfaces of the gusset plates by third bolts, wherein the assembly is free of a connecting member on the outer surfaces of the gusset plates between the flanges of the column.
2. The assembly of claim 1 , wherein the first connecting members comprise a pair of first connecting members, and the second connecting members comprise a pair of second connecting members.
3. The assembly of claim 1 , wherein the first and second connecting members comprise angle irons.
4. The assembly of claim 3 , wherein each angle arm includes a first arm bolted to the column and a second arm bolted to a gusset plate.
5. The assembly of claim 1 wherein the first and second connecting members are each formed as one of: bending a plate; connecting separately formed parts; or casting as one piece of material.
6. The assembly of claim 1 , wherein the second connecting members extend parallel to a longitudinal axis of the column.
7. The assembly of claim 1 , wherein the second connecting members mirror the first connecting members about the flange.
8. The assembly of claim 1 , wherein the column is free of welds attaching the connecting members to the flange.
9. The assembly of claim 1 , wherein the first and second bolts are vertically offset.
10. The assembly of claim 1 , wherein the first and second connecting members are flush with top and bottom edges of the gusset plates.
11. The assembly of claim 1 , wherein the assembly is free of bolts extending through both the second and third connecting members, the third connecting members being disposed at a top of the gusset plates.
12. A prefabricated column assembly comprising:
a column including flanges;
first bolts;
first connecting members bolted to an outer surface of one of the flanges by the first bolts such that the first connecting members contact the outer surface of said one of the flanges;
second connecting members bolted to an inner surface of said one of the flanges by the first bolts such that the second connecting members contact the inner surface of said one of the flanges;
a pair of gusset plates extending laterally outward from the column;
second bolts attaching the gusset plates to the first and second connecting members on opposite sides of the column; and
third connecting members attached to outer surfaces of the gusset plates by third bolts, wherein the assembly is free of a connecting member on the outer surfaces of the gusset plates between the flanges of the column.
13. The assembly of claim 1 , in combination with a beam assembly including a beam, the beam assembly being configured for attachment to the column assembly whereby longitudinal edges of the beam are spaced laterally inward from inner surfaces of the gusset plates so that the beam is received between the gusset plates when the beam assembly is attached to the column assembly.