Span of wall plates

[nelliedee]

I am about to order the wall plates for a 2 story extension. Is there guidelines for the length. One wall is 9 metres long so I am trying to find out if using 2 pieces at 4.5 metres is acceptable along this wall. I understand that if we use 2 pieces then we would need to make a scarf joint.
Also, are we meant to just butt the plates up where 2 walls meet at right angles. Or do we again use a joining cut?
Nelliedee

 

[noseall]

you will be ok joining the plates on a long run.

we try and join each junction.

 

[nelliedee]

Is any join acceptable? and if you had a 9 metre wall would you use 2 pieces?
Nelliedee

 

[noseall]

i use an overlapping join like the bottom image in this picture.

on a 9m run two or more pieces is normal.

 

[nelliedee]

Thank you noseall
Nelliedee