I never tried working in mine. I think they would be too tight for that. I used mine strictly for storage. I kept my old tractors and hit/miss engines in them.
Joe
indeed, i believe an 8' would be a bit tight. for that reason i'm looking at 12-13' models. my car is about 6-6.5' wide, leaving me with roughly 3' on each side. i figure i can just offset the car to one side, leaving me with about 5' of working room on whatever side i'm on. then when i'm done with that side i'll just shift it to the other side of the "garage" and repeat. to me the additional convenience of a two-bay width is not worth the additional cost.
several things i've taken from this thread, notes for myself and possibly others as well:
1. moisture control is important. more ventilation is better. install vents to allow for natural airflow in/out and consider vapor barriers on the ground to minimize anything rising upwards.
2. keep snow and heavy loads off of the tarp. consider round top design due to increased snow load/structural rigidity. many mention tearing of tarp where it contacts the top frame tube - consider installing a pad or something to distribute the load over a broader area.
3. anchoring is important. right now for installation in a paved driveway, i'm looking at laying down sand to establish a level surface (not the entire area, only wide enough for railroad ties), laying down railroad ties on top of the sand establishing a "footer" for the garage around its perimeter, then bolting each leg flange to the ties.
4. heating - propane/kerosene are out due to moisture production and release of other biproducts into an otherwise poorly ventilated area. currently considering electric heaters or a small wood burner exhausted through a modified vent. pipe would need insulated from tarp to prevent melting. basically limited to radiative heating. also considering installing foam board around interior sides in between frame and tarp to make it a little easier to heat. might aid natural air flow as well (less heat loss outwards, causes hot air to rise upwards and out of vent, drawing fresh air in behind it)
any additional comments / thoughts are more than welcome, thanks for everyone's input