Building Analysis Functional Requirements

Question 1

Typical Efficiency Ratio’s of Building

(Tbl 10.3

Answer 1

Offices: 0.75 - 0.85
     Retail offices: 0.75 - 0.9
         Resturants: 0.65 - 0.75
  Public libraries: 0.60 - 0.75 
          Museums: 0.60 - 0.75
           Hospitals: 0.50 - 0.65

Question 2

Space requirements for estimated non-assigned spaces

Answer 2

Fan Rooms 3-7%
Heat, Boilings Rms 3-5%
Heating forced air 4 -8%
Mechanical Rooms 5-9%

Question 3

Efficiency Formula of a building

Answer 3

Eff. = net area/gross area

Question 4

Net Floor Area

Answer 4

• Commonly used spaces also named as “Assignable areas”
• Measured inside walls
• Main function/ or mainly used rooms

DOES NOT INCLUDE: 
Circulation
stairways
Elevators
General service areas
Corridors, 
Lobbies 
Restrooms
Custodial rooms
Mechanical Spaces
Electrical and telephone equipment rooms 
Wall and structural thicknesses 
(Kaplan, ppp, 33) (Ballast, 10-14)

Question 5

Gross Floor Area

Answer 5

Assignable and non-assignable areas 
Measured to the exterior face of perimeter walls including all interior walls, columns, and shafts 
-Includes:
Circulation
General service areas
Corridors, 
Lobbies 
Restrooms
Custodial rooms
Mechanical Spaces 

• Includes patios, decks, other usable open areas that are enclosed on 3+sides and a solid roof
• SF IS doubled with a ceiling height of 15’ or more (not including stairways with no habitable space above/below
• Includes any covered areas on/below the first or main floor when the average height is more than 6’ 0”

(Kaplan, PPP, 33) (Ballast, 10-14)

Question 6

Least efficient space type (based on table 10.3)

Answer 6

Hospital 0.50 - 0.65 eff ratio

Question 7

Most efficient

Answer 7

Overall places of buisness, factories, open warehouses, etc.

Question 8

Offices efficiency ratio (based on table 10.3)

Answer 8

0.75 - 0.85

Question 9

Resturant efficiency ((based on table 10.3)

Answer 9

0.65 - 0.7

Question 10

Public libraries efficiency (based on table 10.3)

Answer 10

0.75 - 0.8

Question 11

Museums efficiency (based on table 10.3)

Answer 11

0.83 - 0.90

Question 12

Theaters efficiency (based on table 10.3)

Answer 12

0.60-.75

Question 13

FAR (Floor Area Ratio)

Answer 13

Gross Area/ Site Area

Question 14

Building efficiency

Answer 14

Buildign Eff. = Net Area/ grosss area