substructure type
substructure or under building is that largely hidden section of the building which is built off the foundations to the ground floor level
['', 'crawlspace', 'slab on grade', 'basement']
MIGS.ba.built.6.0; MIGS.eu.built.6.0; MIGS.vi.built.6.0; MIMAG.built.6.0; MIMARKS.specimen.built.6.0; MIMARKS.survey.built.6.0; MIMS.me.built.6.0; MISAG.built.6.0; MIUVIG.built.6.0