Flare Bevel void fill

[mdale]

If I need to weld two members together and has a large radius, can I specify a backer rod to fill in the void provided the weld attaches the rod to both members and extends over the top of the backer rod?

 

[MintJulep]

It's no longer a flare-bevel weld.

It's something else, and will behave differently than a flare-bevel.

 

[unclesyd]

What code are you under for your welding procedure?

Can you come back with some more information sizes and material?

A rod isn't normally used for a backing ring. Look at the site below for some acceptable shapes for backing rings.
Most codes require that if you use a backing ring you have to use a welding procedure that qualifies the use of same.

http://www.robvon.com/

 

[mdale]

The connection is similar to Fibure 8-18 on page 8-24 of the AISC Manual 13th edition. The contractor wants to add a channel to each side of a tube column. The web of the channel will be next to the column and the flang will be flush with the column.

 

[stanweld]

mdale,
What you are proposing may prove highly similar to slugging a weld in actual practice, resulting in cracking and weld failure in service (depending on the service conditions). As a general rule, I would recommend against it.