base for a greenhouse

[kia cat]

Got an 8' x 6' greenhouse. It has an I [ this would look like it if it wasn't a sans serif font ] steel frame.I'd like to set it on three courses of brick to make inside a bit higher. Would you reckon I'll need footings or could I get away with using a concrete gravel board laid flat. We are on heavy clay soil and greenhouse is glass. Thanks

[carlton23]

Play safe, use footings.

[tamborine]

Dig 18" perimeter trench & fill with concrete, fix GH on top. Trench keep out weeds as well.