Load on load-bearing partition wall?

[Kicken]

Is there any rule of thumb/approximate way to calculate the size of the force on a load-bearing partition under a framework truss according to the attached file?

Span 9m
Floor area between frame legs 5.5m.

The force from the floor is quite simple to calculate.
But the force acting on the frame legs (snow, wind, and construction) I don't know how to calculate, but it must depend somewhat on how the truss is dimensioned?

 

[huggan]

95*45 will suffice as long as you place the wall studs directly under the rafters of course.

 

[Kicken]

95x45 is probably sufficient if you make a load-bearing partition wall.

But the reason I'm asking is that the load-bearing partition wall will be partially replaced by a 2.5m low beam (yellow) which at one end rests on the load-bearing wall (red) and the other hangs on a truss (green)!

So it's the force in the truss that I want to calculate.

The truss that the beam would hang on would have a 3m wide usable attic and be self-supporting, the height of the lower chord would be about 700mm and would allow for quite a strong truss structure.



Will buy the trusses but want to calculate first if it is possible.