The other method which can be used in some instances is using a truss to hold up the original roof especially when adding onto the side of an existing house.
Removing a wall in a house with a truss roof.
There may still not be any interior bearing walls but you should check.
And the homeowner wants to extend a 7 opening with 2 2x8 headers there now to 14 opening for a wall that is perp.
This is sometimes done by a homeowner to provide cleared space in the attic for storage but destroys the structural integrity of the truss.
However if you want to better utilize the space in your loft you may consider changing roof trusses and going for stick framing or rafters instead.
For example a gable end truss may be designed with support members that transmit the roof weight load outward to the side walls allowing the end wall directly below it to have breaks or openings in it that would otherwise be impossible.
The wall that i intend to remove is in the middle of the truss system.
You can remove either type of wall but if the wall is load bearing you have to take special precautions to support the structure during removal and to add a beam or other form.
Is it true that you can remove any walls from the interior with out fear of roof sag or worse collapse.
Directly under the center king post and gusset plate where the bottom cord attach together.
You will require a building consent to remove or alter load bearing walls.
Roof trusses are a common means of support and load bearing.
We usually build on the exterior walls set the trusses and do all of the chord blocking and truss bracing before buildin.
Engineered roof truss systems may be designed to eliminate the need for load bearing walls or change where the bearing walls are located.
These are called bearing walls.
Only some of your walls are needed to hold up your house.
2 truss chords have been removed.
Remember any alterations to a roof should be undertaken only with an engineer.
A girder truss can be used to support an existing roof whether the original roof is trussed or pitched.
The rest of the walls the partition walls are simply there to divide rooms.
To the 40 foot trusses.
Just a quick consideration of your situation if the interior wall was framed after the trusses roof sheathing roofing were installed then i would expect little deflection after removing the interior wall.
Hello the attached pdf shows the original house roofing blueprints with the walls we plan to remove in yellow.
Since it is a truss system roof.
The roof has prefabbed trusses accross the whole span.