30' wide X 29' tall side wall. about 16,000 Bu.
with extension 32,000 Bu.
The roof with vents will need support just on the vents.
the under side of the roof will print just fine without support.
There are separate roof vents that you can glue on the plain roof or ad more to the other roof. prints better with support.
Print the unload conveyor on it's side with support.
Here is a link to my Wet Holding Bin. https://www.thingiverse.com/thing:3454345
Here is a link to my Grain Dump Pit. https://www.thingiverse.com/thing:3454510
Here is a link to my Overhead Bin and Stand. https://www.thingiverse.com/thing:3478353