This can easily be accomplished by using a hammer and a crowbar.
How to remove wooden roof rafters from a garage roof.
The first step when removing a wood roof truss is to disassemble the existing roof that is causing a load upon the truss.
Remember any alterations to a roof should be undertaken only with an engineer.
Place the jack back underneath the beam but this time under the iron piece.
Remove the jack quickly and set the iron onto the entire beam.
Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions.
When taking the roofing materials off be sure to extend the path of demolishing to each existing truss on each side of the damaged one.
Discard the wood in a garbage bin as you work to make the cleanup easier.
Once you re satisfied that the sister rafter is firm in place and giving good support to the roof it s time to remove the supports.
Start with the longer support and hammer toward the center of the garage.
To do this knock at the top of the posts with the hammer.
The rotten wood will come away easily.
Then lower the jack down a little at a time so that the metal can take the weight of the roof.
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.
Step 1 measure the dimensions of the old rafters beneath your roofing surface.
Roof trusses are a common means of support and load bearing.
Drive the remaining carriage bolts into the two by six rafter and tighten them all up.