The inside face of a wall, window, ceiling or floor that is provided as part of the base building for the general use of occupants, excluding the thickness of any special surfacing materials applied to meet the particular needs of specific occupants. (ANSI derived from Finished Surface)
DISCUSSION ? The finished surface of a wall normally consists of gypsum wall board, glass, plaster, concrete, brick or masonry units. Special wall materials used to surface a wall are furring strips, paneling or casework, tile, mirrors and any materials referred to as ?wall coverings? or ?window coverings? that are applied over base building finished walls or windows. The finished surface of an exterior window is the glass surface that is in direct contact with the interior environment of the building. The finished surface of a floor is the top of a deck, typically concrete or wood, without special surfacing materials that are applied over the base building finished floor, such as carpeting, tile, resilient flooring or any materials referred to as ?floor coverings.?
The finished surface of a ceiling is typically the underside of acoustical tile, plaster, gypsum, wallboard, or similar surface. In the absence of a continuous ceiling surface, the finished surface of the ceiling shall be the bottom of any suspended ceiling grid, or, if no ceiling grid exists, the lower of (a) the underside of exposed building structure elements or (b) the lowest general level of the bottom of light fixtures (not including up-lighting), air diffusers, sprinkler heads or similar base building fixtures that are suspended below the underside of building structural elements, or c) the typical ceiling height established by the intended building design; provided that a finished ceiling height as designed does not create a restricted headroom condition.
A Unified Approach for Measuring Office Space | For Use in Facility and Property Management : Copyright 2007. Building Owners and Managers Associa