Welding rebar 1

[SperlingPE]

I have situation requiring welded rebar splices.

1. Is this a pre-qualifed weld?
2. If not pre-qual, what is required?
3. What type of splice would you recommend?
a. bars side by side
b. bars welded to a plate
c. butt splice

 

[dik]

Unless the rebar is stipulated as being weldable, you likely have to do a metalurgical analysis and determine the carbon equivalency.

Dik

 

[SperlingPE]

It is new construction. Rebar is specified as weldable.

 

[sdz]

Try the rebar manufacturer's web site.

 

[Dinosaur]

AWS D1.4 covers welding reinforcing steel.

I recommend you only allow ASTM A706 rebar to be welded, not ASTM A615.

If you have to weld the rebar, I think a lap splice would be my first choice, however, that is highly dependent on the specifics of your situation.

I would first check into mechanical splices before looking at welding. There are many that are capable of developing 125% of the specified yield strength of the bar.

Good Luck.

 

[hogan666]

As mentioned AWS D1.4 is typically the applicable code. Also, A706 has a W on that indicates weldable.
1) The only weld pre qualified by his code is a fillet. This would only apply to T connections.
2)The WPS will need to be qualified by testing. The welder will also need to perform a certification test.
3)Splice is dependant on application.

 

[SperlingPE]

thanks for the assistance
The weldable rebar (A706) is already specified if welded splices are used.
AWS D1.4 is on the way.
Contractor is reconsidering the use of mech. splices because of the required testing and welder cert.