Header size for load bearing timber wall

[martyc]

Hi there,
Building a 4*2 load bearing timber wall and wondering what size header it needs and also if it needs a larger than 4*2 sole plate.
The wall is supporting a "lean-to" slate roof which spans 10 feet.

I have read conflicting advice as to the size of header required...one person said a 12*2 was required which i dont have space for
Cheers,
Marty.

 

[JFC]

I've doubled up smaller timbers on loft conversions to take the roof but i can't quote sizes as i don't have them in front of me .
Box beams will also a very heavy load but then all this is worked out before i get the plans . I assume you are not working to plans ?

 

[martyc]

Hi JFC,
When you say doubled up..is that implying in my case to use 2 2*4's on top of each other as the header?

I am working to plans its just im toying with a few options around supporting the roof.

Timber frame wall,block wall, or RSJ supported at gable walls.
My plans actually have the roof supported with a purlin running from gable to gable(175*75)

Cheers for your input.
Marty.

 

[JFC]

By doubled up i mean 2 timbers next to each other and bolted together .

 

[martyc]

Cheers JFC,
As they are 4*2's i imagine id be as well laying them on top of each other, rather than side to side...less likely to split from each other that way.

 

[noseall]

it is the uprights that are important and not the header. locate the upright studs beneath their roof counterparts.

 

[martyc]

Thanks noseall

 

[JFC]

No side by side and bolted together is stronger .