I am leaning toward adding a column in the middle of the 18 ft span
that would divide it into two 9- ft spans -- then I could make the
glazing panels look something like the older style outward opening
garage doors that used to be common.
I guess my problem is to get the heat from the garage (where I don't
need much) to the house -- that was the reason for the vertical
divider along the ceiling and the duct/fan. Maybe there is a simpler way?
Thanks for the comments -- Gary