Sister joint and size
We are thinking about sister two joints under first floor from basement. First of all, is this a do it yourself project? We believe we have basic capenter skill.
Also, our house is about 30 years old. The measures I got are 1.5x7. I search on the web and found all the joints are in size 2x8 or 2x10. Did I measure wrong or this is the size the builder should use?