Designing a barn/out-building for my off-grid place. Essentially this is an open structure (think of sticks with a roof), but part of which is a shed. The problem is, the longer poles will need to be about 22 feet, which longer than the lumber generally sold (16 ft). So I thought that I might make built-up poles from 2x4s. Here is a basic picture of what I am thinking.
Now of course I will have bracing along one entire wall, and all around near the tops. But bracing is not the issue. I want to focus on making sure these posts are a halfway decent idea.
If it's better and safer I can probably go with the fancy purpose-built posts, but I would really rather save the money by doing things on my own if I can.
Best Answer
To partially reiterate my comment, that's a common strategy even for commercial buildings, but for that length you should be using 2x6. So the answer is "yes".
However, the specifics are important. Adequate lap, joint scatter, and fastener type and schedule are all critical factors in your success.