For the jacking i used a pittsburgh 4 ton hydraulic bottle jack.
Jacking up a porch roof to remove old columns.
Bottle jacks are available in a variety of shapes and sizes.
Slide the column out from underneath the roof.
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Get to the jacking of the porch roof already jack.
To safely remove the old posts before installing the new ones the porch roof needs to be securely supported.
I purchased it at harbor freight tools love harbor freight for certain types of tools like these.
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This jack has a maximum extension around 8 inches and it is about 20.
Do not raise the roof any further than necessary to remove the porch column.
Position a jack directly under the porch beam next to the column.
Measure from the porch beam to the jack and cut the 4 4 to just under this length.
This is usually done by jacking up temporary post material to take the weight of the roof so that the rotting post or column can be removed.
We used a rough cut 4 4 post as the jacking piece between the jack and the porch header.
The column is supporting the roof therefore the load has to be supported to remove the column.
How i replace rotting supports beam and posts under deck.
Position the post and use the jack to raise the porch.
In order to do this we removed the flooring up to the column and then placed a 20 ton hydraulic bottle jack on top of the brick foundation under the porch.
Attach a short 2 x 6 board to the end of a 4 x 4 post.
You may hear a little cracking sound which is normal.