What this comes down to is creating a situation on a leased area with other leasable areas on each side of the hangar. If the hangar is placed 30 ft from their lease line, then anyone submitting a building on the adjacent lot would not be able to build within 20 ft of their lease line. This may make their lot unbuildable. The open yard provision in 507 must be within their own lot. In the case of our airport, it is all one parcel, but they lease out lots to the prospective tenants. I suppose the airport manager can inform tenants how far their building must be from an adjacent hangar, and if that won't work they will need to pick a lot that will. However, I believe we need to look for this clear space within their own lot, whether it be a parcel line or a lease line. There are some existing conditions I am having to deal with...fun. Thanks again.