Distance between splices

[msboobathi]

Dear All
Are there any specifications for the distance between splice. The contractor erected the column 100 mm outside with a stub.
He also brought the beam with its original length. Now asking for a splice of 100 mm length. Beam is HSS 500x400x tk. Usually, we will allow the splice Depth or 1 m whichever is smaller. But I am unable to find the AISC code reference.

Regaards
M.S.Boobathi

 

[KootK]

I don't think that splicing so close to the columns is prohibited in general but:

1) You obviously need enough space there to transfer the forces across the splice For the flange connections, that might have to be welding here, and probably groove welding.

2) If this is s seismic moment frame beam, you probably don't want the splice that close to a potential plastic hinge region.

 

[dhengr]

Msboobathi
Putting one 200mm long splice at one end of the beam, if other details allow, would be the most expeditious solution. You can redrill a few holes, and the like, for less than the cost of the second end splice. An HSS 500x400x thk? (20”x16”x thk?) with the splice 200mm from the end allows enough room and access to be able to weld from both the inside and the outside, a CJP, ground smooth on both surfaces. Hell, you can almost fit a whole welder in that space, and you can prep. the ends of the new piece for the weld and for the intended end connection, in the shop. Maybe UT the weld, at least on the flgs. Prep. the joint for one pass on the inside, then back gouge from the outside, and complete the weld from the outside.

 

[msboobathi]

The contractor is proposing CJP.

 

[JLNJ]

The columns are out of plumb by 100mm??

This sounds grossly out of spec. Maybe it’s best to fix what’s ailing the columns.

 

[msboobathi]

It is a mistake by the concrete contractor. He constructed the pedestal+anchor bolts with 100 mm offset by referring to old drawings. The steel contractor brought the
steel columns with revised drawings.