Question: How do you make equal sized elevation beams?
Options:
First decide what size you want, then cut it with a saw.  Using the beam you cut, mark off 7 additional beams so they are the exact size and cut them with the saw.
First decide what size you want, then cut it with a saw.  Using the beam you cut, estimate the 7 additional beams so they are the right size and cut them with the saw.
Answer: First decide what size you want, then cut it with a saw.  Using the beam you cut, mark off 7 additional beams so they are the exact size and cut them with the saw.