It is midpoint interesting on grade point as the front yard is 10' higher that the ground at the base of the garage I want 12' ceiling and a 8' upstairs if possible.
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That's room in roof trusses - nice because the floor joists are only 2x8 for a 28'span -- saves a few inches.
Bit hard to see, but I dropped the grade by the height of the retaining wall on the right, about 24". Foundation wall is along the left of the pic. This let me use the average of the two grades to determine the 'height above grade' .