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Lasercad™ (Space Measurement)
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Industrial Standard Method of Measurement
The combined Building Owners and Managers Association (BOMA) and the Society of Industrial and Office Realtors (SIOR), Standard Method of Measurement is used to measure industrial and warehouse buildings. This method of measurement states:
Single Occupancy Building
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Rentable Area is the aggregate of the rentable areas of all floors and mezzanines:
Floors - measure to the exterior face of exterior walls.
Mezzanines - measure to the end of their floor limits and/or to the exterior face of any exterior walls to which they are attached.
Multiple Occupancy Building (Single Storey)
Calculate the Total Rentable Area of the building including all mezzanines (as described above).
Calculate all Tenant Areas in the building (as measured on each floor to the exterior face of exterior walls) as well as all Rentable Mezzanine Areas (as measured to the end of their floor limits and/or to the exterior face of any exterior walls to which they are attached). Measurements between adjoining tenant units are always taken to the centre of their demising walls.
Calculate the Building Common Areas by subtracting from the Total Rentable Area of the building the total of all Tenant Areas and Rentable Mezzanine Areas.
The Building Common Area is allocated to each tenant unit by applying the R/U Factor to the aggregate of that unit's Tenant Area and Rentable Mezzanine Area. The result is the Tenant Rentable Area.
The R/U Factor is a factor which proportionately allocates any Building Common Areas amongst the tenant units.
Multiple Occupancy Building (Multiple Storey)
Calculate the Gross Measured Area for each floor and mezzanine within the building, having regard to exterior walls and end floor limits.
Calculate the Rentable Area for each floor by deducting from the Gross Measured Area the area of its Major Vertical Penetrations. BOMA/SIOR defines "Major Vertical Penetrations" as stairs, elevator shafts, flues, pipe shafts, vertical ducts, and the like, and their enclosing walls.
Calculate all Tenant Areas on each floor to determine the Floor Rentable Areas. Tenant Areas are measured to the exterior face of exterior walls, to the inside face of Floor Common Areas and Major Vertical Penetrations, and to the centreline of demising walls separating tenants and/or Building Common Areas.
Calculate the Floor Common Area of every floor by subtracting the Tenant Rentable Area from the Floor Rentable Area.
The Floor Common Area is allocated to each Tenant Area on that floor by applying that floor's R/U ratio. The Floor R/U ratio is a factor which proportionately allocates any Floor Common Areas amongst the tenant units. The measured area of any mezzanines is then added to this figure.
The Building Common Area is allocated to each area calculated in Step 5 by applying the Building R/U Ratio. The result is the Tenant Rentable Area.
Frequently Asked Questions
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A: Columns are ignored when calculating building areas. As with the BOMA Office Standard, no deductions are made "for columns and projections necessary to the building".
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A: Yes. Method A is used in most markets to measure industrial space, having regard to the exterior walls. Method B originates from the need in warm climates to measure industrial buildings which are not fully enclosed with exterior walls.
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A: BOMA recommends that buildings which are at least 51% used for office purposes be measured in accordance with the ANSI/BOMA Z65.1 office standard. When the building is at least 51% used for non-office purposes (including retail and mixed use), the BOMA/SIOR Industrial Standard should be used.
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