New plan! So, I'm changing my plans a little and want to know how much weight will a 4x6 support?
I'll have 4 4x6's sitting side by side, 4" high and 6" wide. They are 8' long. The tank will sit centered on them and is 6' long. It's going to be sitting on 3 rows of cinder blocks. The blocks will cover the full width and will be centered and spaced 5' apart.
Finally, the 4x6's are untreated Douglas Fir.
I'll have 4 4x6's sitting side by side, 4" high and 6" wide. They are 8' long. The tank will sit centered on them and is 6' long. It's going to be sitting on 3 rows of cinder blocks. The blocks will cover the full width and will be centered and spaced 5' apart.
Finally, the 4x6's are untreated Douglas Fir.