Net Floor Area Defined

The net floor area of a building or portion thereof not provided with surrounding exterior walls shall be the clear floor space under the horizontal pro jection of the roof or floor above.

Net floor area defined. Case notes for rating valuation. Net floor area the actual occupied area not including unoccupied accessory areas such as corridors stairways toilet rooms mechanical rooms and closets. Floor area definitions vary depending on. Gross floor area of a building excluding the area occupied by walls and partitions the circulation area and the mechanical area.

Architectural projection shall mean any projection not intended for shelter or occupancy and which extends beyond the outer face of an exterior wall of a building but shall not include signs. Space efficiency is defined as the ratio of nfa to gfa. David faulkner of colliers international is amazed at the number of ways that exist regionally to measure gross floor area gfa which at its most basic level is the total floor area as measured round the building perimeter. Floor area not defined in the zoning and development by law but refers to the area of built space net floor area the sum of all the areas of a building less any exclusions as set out in the applicable regulation in the zoning and development by law sometimes referred to as the usable floor area.

This calculates the 2015 international residential building code minimum irc section r806 roof ventilation 1 which states that 1 square foot of net free area for every 150 square feet of attic floor space with the attic defined as length x width floor of the attic. Means the clear floor space exclusive of fixed or built in cabinets or appliances included with the surrounding exterior walls or a building or portion thereof. Looking for net floor area. Adding to this confusion is the practice among some developers to use gross leasable area gla and gfa interchangeably or to use.

Definitions of gfa including which areas are to be counted towards it and which areas aren t vary around the world. Define net floor area. The total net free area of the intake and exhaust must be balanced. Much of the confusion lies in the area of definitions for gross net lettable usable saleable carpet and other areas.

Related articles on designing buildings wiki. The following guidelines shall apply when calculating floor area under the building code definition. Explanation of net floor area. Examples listed below are some examples of net floor area to help illustrate the relationship to gross floor area.

The net floor area nfa of the private units in a residential condo building is typically 60 of the gross floor area gfa.