Bolt Hole sizes in existing plate exchanger too large.

[Leftwow]

The bolt hole sizes in the existing plate exchanger on site are close to 2". We assume that this was specified to be bearing on concrete with standard anchor-rod holes in the base plate, however we are connecting to a W10X49. We feel as though drilling the same sized hole in the W10X49 would compromise the strength of the member. We need to specify a solution to reduce the hole size on the exchanger. 4 of the bolts are slotted holes. Have you guys encountered this before and what solutions have you done to fix this?

 

[jayrod12]

Plate washer with the proper sized hole welded all around.

 

[Nor Cal SE]

I agree with Jayrod12, this is the simplest remedy that is also structurally adequate.

 

[Leftwow]

Guys what about slotted holes this exchanger's plates are 4.5" thick.

 

[Sawbux]

What if you cut sections of pipe - 1-1/2 Schedule 80 = 1.9" O.D. x 1.5" I.D to fit in 2" dia. holes?
Then use washers to cover top side of holes. Reduces bolt size to 1.25" or 1.375".

 

[delagina]

Re slotted holes, your beam will have standard round holes only the exchanger base plate is slotted.