Cary Davidson sent some images of his Victorian Greenhouse installation. Inside he used some angle iron to permanently mount planters. Additionally, he used aa standard aluminum gutter to create a long horizontal planter on one of the shelves.
Full view of planters ( green, left and right) separated by a long planter constructed from a piece of aluminum rain gutter. 
Close up of angle iron mounting planter to greenhouse support structure. The structure is strong enough to drive bolts into. 
Side view of Cary's greenhouse installation. 
Front view of Cary's greenhouse installation. 
