Field slotted base plates

[BSE05]

I have several column base plates on a five story building that were slotted in the field to hit misaligned anchor bolts. the columns are on grouted leveling plates. Holes are inward from face of concrete pier by about 1 inch on all four bolts.

Steel fabricator want to weld plates over hole. What is best way to fix this?

 

[jayrod12]

Welded plates (washers). It's quick, easy and relatively effective. It's done quite commonly.

 

[KootK]

Is there any net tension being transferred through the base plates? If not, the contractor's proposal should be fine. It's probably fine either way really. You'd just need to re-evaluate the connection based on the revised geometry.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[TehMightyEngineer]

Thirded. If you're transferring shear through the anchor bolts you will have the check bearing on the washers and the weld strength.

Maine EIT, Civil/Structural.

 

[BUGGAR]

I think this represents non-conforming work subject to a credit to the owner to reimburse your time (and ours) in developing a solution to the Contractor's error. Invoke the changes clause and submit a bill to the Contractor. He still has the option of tearing it out and re-building.

Follow the lead of Bill Gates; squash the Contractor and anyone else who threatens your well being.

 

[oldrunner]

If there is shear in the bolt, then one has to check the off set bending moment.