module 02 | project assessment + codes Flashcards
what is the order of hierarchy for building square footage designations?
- gross area (gsf)
- rentable area (rsf)
- net area (nsf)
- usable area (usf)
what is usable area?
the space occupied by tenants, including net area and circulation
excludes building core + common spaces
what spaces does the usable area exclude?
building core + common spaces
ex: elevators, exit stairs, mechanical / electrical rooms, core restrooms
what is the calculation for usable area?
usable area = net area + circulation area
what is net area?
the space required for the function of the space
what spaces does net area include?
workspaces + dedicated support spaces
ex: workstations, offices, conference rooms, break rooms, copy rooms, etc
what is an example of net area?
an 8’ x 8’ workstation is 64 nsf. 10 workstations would be 640 nsf + circulation space
how is net area calculated?
net area is found by adding together all programmed areas
what is rentable area?
the floor area that the tenant pays rent on
ex: everything inside the building, including wall thickness and structural elements
what spaces are excluded in the rentable area?
major vertical penetrations
ex: stairs, elevators, shafts
how is circulation area calculated?
circulation area = nsf x (circulation multiplier - 1)
what is the calculation for rentable area?
rentable area = usable area + prorated share of building common area
what does the circulation multiplier allow one to calculate?
the circulation multiplier allows one to calculate how much additional space is needed outside of the programmed total
what is gross area?
the floor area within the building’s skin
ex: everything including exterior wall thickness
what is the calculation for efficiency factor?
efficiency factor = nsf / total occupant area
what is the occupant area?
the amount of space being actively used by the tenant
if glass is more than 50% of the wall area, how is the occupant area measured?
occupant area is measured from the interior face of the glass to the centerline of demising partitions
if glass is less than 50% of the wall area, how is the occupant area measured?
occupant area is measured from the exterior wall’s interior finish face to the centerline of adjacent demising partitions
how are net/gross ratios determined?
net/gross ratios are determined by dividing the nsf program total by the efficiency factor
ex: net/gross = nsf / efficiency factor
what is the term for the formal designation for the primary use of a building?
the occupancy classification
what is a group e occupancy?
educational - for grades 12 and below
what is group b occupancy?
business - any space used for offices, professional, or service transactions
when does an assembly occupancy become a business occupancy?
- if the space has an occupancy load of fewer than 50 and is accessory to another occupancy
- if the space is less than 750 sf and an accessory to another occupancy
what is a group i occupancy?
institutional - spaces / buildings for people under care or supervision incapable of exiting the building unassisted