Demising walls that separate tenants from each other and from public corridors. These partitions require high fireproof ratings, typically run higher than the ceiling height, and often run to the concrete slab of the floor above.

The wall that separates a tenant's area from another tenant's area or building common areas.

The wall which separates a tenant's suite from another tenant's suite, or building common areas. In most cases, a demising wall will be constructed from floor to either the building roof deck or floor deck. The wall may also be a fire rated wall (see "partition wall").