Splice for top or bottom chord of truss

[Ravi_1103]

My question is how to provide a splice connection for top or bottom chord of truss?
Am Designing a Pratt kind of truss using L-angle sections and actual span length is 8.0 m. I have one 3.0 m L-angle piece & one more 5.0 m L-angle piece.
I need to use these two pieces for bottom chord with a splice connection. So my question is how to provide a spice to joint these two members to acts like one continuous member?
Please suggest some options

Thanks
Ravi

 

[structSU10]

Do you mean the truss chords are angle shapes, or you want to splice using angles?

What are the forces you are dealing with?

Preference for bolts or welds?

 

[BAretired]

End plates welded to chord and bolted together is one possibility.

BA

 

[oldestguy]

Seems like the word "angles" has some confused. I think you are considering the steel section in an angle shape. The main factors to consider are the nail, screws or bolts to be used to transfer the wood stresses to the steel. There are references out there for the shear values of these fasteners. US Forest Products lab likely has some, especially for nails in wood. Consider ring shank also. They are very tough. For any fasteners there are rules for spacing along the member.
Those spacing rules are sometimes not easily followed, so I'd stagger the holes so none have close spacing on the same grain line to "cheat a little" on this.

I suppose I shuld add for a steel truss just weld the new angles to the old.

 

[CANPRO]

Are you splicing in the shop because you can't get 8m long material, or do you need a field splice for shipping purposes? If shop spliced, I'd just provide a full penetration weld, which is easy enough to do in the shop. If its a field splice, I'd be looking at a bolted option per BA's suggestion. If its a bolted connection (or a field welded connection), getting the actual load in the member will be helpful so you don't have to design for the full strength of the section.

EDIT: It appears you need to hire an engineer to design this splice for you.

 

[MotorCity]

CJP weld

Bolt the angles to a splice plate

Weld the angles to s splice plate

 

[jayrod12]

It also depends whether the member needs to be continuous or not. In most trusses the chords see only minor bending, therefore continuity in that regard wouldn't be overly important provided your splice detail can transfer the appropriate axial loading.