To do this you will need to cut a slot into the existing truss rafter or joist in a u shape to the required length of the threaded steel bars in the new section of timber.
How to remove a roof truss.
2 truss chords have been removed.
Let the repaired wood truss set for 24 hours in dry conditions to secure the repair.
Remove the existing roof.
These trusses are usually engineered by a structural engineering company to carry a specific roof load.
If a lot of trusses are damaged or one has been significantly modified or cut then consulting a engineer is wise.
This can easily be accomplished by using a hammer and a crowbar.
This is sometimes done by a homeowner to provide cleared space in the attic for storage but destroys the structural integrity of the truss.
Refill the holes in the wood truss with wood adhesive and apply a wood scab to patch it.
Often the height of the roof may be too low when constructed with truss rafters which means that it may need to be raised too.
A truss frame will occupy the majority of the space within the loft which means that the whole structure needs replacing if you decide to convert your attic.
Use a circular saw to cut the 2 by 4s along these lines.
Look at this photo of the space created by attic trusses at my home.
The first step when removing a wood roof truss is to disassemble the existing roof that is causing a load upon the truss.
Remove the damaged connector plate and replace it even if it is only missing a few teeth.
Once you cut out the roof trusses the load bearing will shift to your new supports.
Fit the first resulting brace inside the truss at the point you marked on the lower cord with the flat bottom end on top of the lower cord and the angled edge against the bottom of the upper cord or rafter.
Run a support header underneath the ridge of your roof an engineer will be able to find the correct type and size for you.
The new section of timber is now put in place with the threaded steel bars sitting in the slot.
There may still not be any interior bearing walls but you should check.
I have this above my own garage.
When a truss becomes damaged cut or modified there is a chance of a structural overload or that they will not perform properly.
3 only part of the roof framing may be trusses and the rest is rafters as in the photo below.
Attic trusses have a rectangular shape inside each truss.
This may well require planning permission.