You could wind up overstressing the chord.
Support porch roof temporarily.
Temporarily supporting porch roof i ve seen idiots try to jack things up with a bottle jack and 2 2x6s nailed together like a double and that post will bend i ve shown them a 2x4 t post and it lifted the load no problem.
Determine how much support is needed your porch roof will need to have a lot of support in order for it to stay.
For a 20 foot porch roof you will then need to have five different temporary supports.
Temporary support for roof creating a point of support a foot or two back on the bottom chord of a truss is not going to do you any good and may do you harm.
Stakes go down about 18 to 24.
You need to shore right against the wall to putt the load into the chord intersections where the truss is designed to be load bearing.
Measure for posts large 8 x 8 posts are necessary for the use of supporting a porch roof.
With the roof supported you can do the repair work.
If you are thinking about replacing old rotted porch posts the first thing you ll need to know is how to jack up and support the roof structure properly and.
How to support a porch roof step 1.
For larger applications like supporting floor joists in the basement 4 x 4 posts should be set at 6 foot intervals.
Bird mouth the top cut and dig a small kicker in at the bottom of course i ll usually have post jacks in place somewhere so i can slightly jack up the roof to release the column.
Temporarily supporting porch roof i usually slam two 2x6 s together in a sandwich and pepper them with nails.
Tri square pencil circular saw 2 inch wood screws 3 inch wood screws drill gun an assistant.
Without a picture i m guessing but it would be best to put a temporary beam under the roof side to side and adequate temporary support columns under the ends of the beam with some diagonal bracing.
Things you ll need tape measure spade large wooden stakes mallet 2x6 boards about 30 percent longer than the height of your porch eaves enough of them to put two every five feet around.