Appendix C: Space Allocation & Calculation Guidelines

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1 Appendix C: Space Allocation & Calculation Guidelines Introduction Work Space Design The suggested space guidelines represented in this section establish the basis for the square footage projections and allocations. Each sketch illustrates typical office spaces, open plan work stations (modular), specialized equipment, or support spaces that are repetitive in nature and used in multiple applications in a department. It is important to note that while these office space standards show possibilities for actual work space size or furniture placement, it is not the intention of the graphics to dictate the final room sizes, shapes or furniture arrangements. The representative sketches are merely to identify the required square footage allocations and to act as guidelines for future departmental space planning needs. This update includes suggestions to address common challenges inherent in the design of space within existing buildings. Care should be taken to address issues like: mobility access, HIPPA, HR related material, light glare on the PC monitors and similar issues. Staffing Categories The staff categories identified in this report is based on existing job descriptions and function as of July 1, Specific circumstances are taken into consideration when categorizing job titles, like: additional space required by a plan checker to accommodate a table large enough to roll out a set of building plans. As future space planning is implemented, departmental needs may require individual consideration in figuring actual space sizes. Guidelines for Work Space Areas The spaces illustrated in this section could be slightly larger or smaller in order to accommodate unusual space shapes dictated by building configuration or other uncontrollable physical characteristics of existing structures. The recommended areas are intended to be used as planning guidelines for the use indicated. Standard office furniture might also affect the size of the spaces slightly in Positions 1 through 4. Also found in this section are illustrations for support spaces commonly found associated to office Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 1 of 22

2 functions. Again, the illustrations are merely representing suggestions for the amount of square footage needed for those support spaces. Not every support space that is needed will be illustrated. Some of the illustrated spaces could be used for purposes other than those stated on the illustrations. The table below indicates the station sizes used to calculate the Space Assessments in each department. For purposes of space calculation in this report, the average area is used and is represented in the last column in the table below. Each of the agencies listed below were asked to provide their space assignment reports, copies of these reports are available at the County Architects Office for review. The Measurement of Space It is not uncommon for an area calculated from the building plans to differ from what is measured on site. It is also not uncommon for a space to be measured differently by two individuals. The calculation for an area, resulting from a site measurement by an occupant, is deemed accurate if a re-measurement gives a result with a variance of two-percent (2%) or less. To assist in a systematic methodology for the measurement of spaces, the Building Owners and Managers Association International (BOMA) in collaboration with American National Standards Institute (ANSI) have developed a measurement methodology (ANSI/BOMA Z ). The first such Standard was developmed in 191 and has been updated over the years as improvements in building technology have improved. The County of Santa Barbara, General Services Facility Services has adopted the BOMA Standard in the measurement of county-owned facilities. The basic idea is that those involved in the measurement of space allocation for whatever reason need to be using the same methodology so as to insure that measurements are consistant. This helps to reduce confusion and conflict over differing measurements. The most common elements missed during site measurements are: elevators, mechanical chases, cooridors, restrooms, storage room and similar spaces that may not be in the immediate area of the office or space being measured. These support or common areas contribute to the overall area allocated to an occupant. The BOMA Standards are available on the BOMA website ( or may be reviewed in the Office of the County Architect Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 2 of 22

3 Figure 1: Space Allocation Table Standards Measured in Square Feet by Agency Station Types Representing Staff Classifications (see Appendix B) General Services Administration State of California Ventura County Los Angeles County San Diego County San Bernadino County Fresno County Santa Clara County Contra Costa County Sonoma County City of Fresno City of Los Angeles Adopted Guideline For Calculation Purposes Position Position Position Position Position Position 6 NA 300 NA Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 3 of 22

4 Space Allocation The following examples are intended to help the reader understand what type of space is assigned to staff as it relates to space planning. The purpose of these guidelines is to provide a basis for estimating the area in square feet needed to carry out a certain function within county government. The general rule is to have as few assignable area types as possible to eliminate what would become an endless study in various combinations. Of the agencies questioned, most, if not all, provided not more than six workstation types. We have based our guidelines upon six basic assignable area types. In addition to space for staff to conduct their function, support space guidelines have also been developed. These include conference rooms, libraries, copier area, etc. Position types 1 though 3 are best when modular furniture are used. The exception to this is the largest allocation of Position 3, which could be within the walls of a private office. When combining position types in a modular furniture layout, additional space can result when a single panel is used between multiple stations. With the revision of the American with Disabilities Act of 1991, there are considerations to the allocation of space to address the changes. Rather than attempt to indicate all the possible impacts of these changes, departments which undertake a remodel, reconfiguration or reorganization of their office space shall work with the County Architect to insure that ADA and other code related issues are address in their project. In the graphics to the right, the Net Staff Area is represented either individually by the workstation or by the clumulative area of all workstations (A, B and C.) Gross Floor Area (A,B,C & D) 2,000 Gross Building Common 3,000 Area (D) (restrooms, Utility Closets, walls and columns, etc.) Net Staff Area (A,B or C) 2,000 Net Support Area (A,B or C) 3,000 Net Combined Area,000 Tenant Common Area 1,00 Net Assignable Area 6,00 Percent of Building Common Area Assignable Building Common Area 6,00/2,000=.26 3,000 x.26 = 780 Gross Assignable Area 7, Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 4 of 22

5 Position 1 Allocation Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page of 22

6 Position 2 Allocation B 3" 6" 12" 24" 48" Scale: ½ = 1'-0" 32" min. C - Plan Notes Overhead Storage Bins (Opened or Closed) 2. Two-drawer lateral file cabinet (locking opt) 3. Workstation panels some may include glass 4. Work Surfaces - 24" min to 30" depth. Printer (opt) dependant upon work assignment 6. Keyboard if on tray see General Notes 1 2 Workstation Position Two 81 sq. ft. D 14 32" min. 7. Monitor if working with sensitive materials see General Notes. 8. Storage or open shelving 9. Pedestal configuration per storage requirements. 10. Chair see General Notes A 11. Insure that appropriate leg room is provided 12. Free-standing bookcase (opt) Guest Chair (opt) 14. Anticipate accommodation of Service Animals 3 4 Hallway 27 sq. ft. Type A B C D NUA '-0" 8'-6" 36"- 44" 36" 68.0 NAA '-0" 9'-0" 36"- 44" 48" '-0" 9'-0" 36"- 44" 60" Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Half of circulation assigned to workstation/office Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 6 of 22

7 Position 3 Allocation Type 3.1 and 3.2 Scale: ½ = 1'-0" 3" 6" 12" 24" 48" B " min C 32" min Plan Notes 1. Overhead Storage Bins (Opened or Closed) 2. Two-drawer lateral file cabinet (locking opt) 3. Workstation panels some may include glass 1 4. Work Surfaces - 24" min to 30" depth. Printer (opt) dependant upon work assignment Workstation Type Three 99 sq. ft D 13 32" min. 1 A. 100 sq. ft Keyboard if on tray see General Notes 7. Monitor if working with sensitive materials see General Notes. 8. Storage or open shelving 9. Pedestal configuration per storage requirements. 10. Chair see General Notes Insure that appropriate leg room is provided 12. Free-standing bookcase or lateral file (opt) 13. Guest Chair (opt) Hallway 33 sq. ft. 14. Alternate PC/Monitor Location 1. Alternate Workstation Entry depends upon PC- Monitor privacy requirements. (Monitor should be perpendicular to workstation entry) 16. Anticipate accommodation of Service Animals Plan note common to both workstation types. Half of circulation assigned to workstation/office Next Page: Type A B C 1 D 2 NUA '-0" 8'-0" 36"- 44" 36" '-0" 9'-0" 36"- 44" 48" '-0" 10'-0" 36"- 44" 60" NAA Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 7 of 22

8 Half of circulation assigned to workstation/office B Type 3.3 Office Scale: ½ = 1'-0" 3" 6" 12" 24" 48" - Plan Notes 32" min. 12 Hallway 30 sq. ft. C 1. Overhead Storage Bins (Opened or Closed) 2. Two-drawer lateral file cabinet (locking opt) 3. Solid wall construction (min of STC 41) 4. Work Surfaces - 24" min to 30" depth Printer (opt) dependant upon work assignment 6. Keyboard if on tray see General Notes 7. Monitor if working with sensitive materials see General Notes. 36" min. 110 sq. ft. Interior Wall 8. Open shelving 9. Pedestal configuration per storage requirements. 10. Chair see General Notes 1 D A 11. Insure that appropriate leg room is provided 12. Side-Light Window Frost & Temp lower panels 13. Guest Chair (opt) Alternate PC/Monitor Location-Monitor privacy requirements. (Monitor should be perpendicular to workstation entry) 1. Anticipate accommodation of Service Animals Previous Page: Previous Page: Type A B C 1 D 2 NUA '-0" 8'-0" 36"- 44" 36" '-0" 9'-0" 36"- 44" 48" '-0" 10'-0" 36"- 44" 60" NAA Exterior Wall Area calculated from exterior wall surface 1. Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Interior Wall Area calculated from wall center Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 8 of 22

9 Position 4 Allocation Type 4.1 Workstation Scale: 3 / 8 = 1'-0" 3" 6" 12" 24" 48" B C - Plan Notes 1. Overhead Storage Bins (Opened or Closed) 2. Two-drawer lateral file cabinet (locking opt) Modular Panels (some may have glass inserts) Workstation Type Four 90 sq. ft. 4 32" min. 4. Work Surfaces - 24" min to 30" depth. Printer (opt) dependant upon work assignment 6. Keyboard if on tray see General Notes 7. Monitor if working with sensitive materials see General Notes. 8. Open shelving 14 D 1 A 9. Pedestal configuration per storage requirements. 10. Chair see General Notes 11. Insure that appropriate leg room is provided Alternate entry work surfaces become an L, lateral file relocated and monitor placed perpendicular to entry. Hallway 33 sq. ft. 13. Guest Chair (opt) 14. Alternate PC/Monitor Location-Monitor privacy requirements. (Monitor should be perpendicular to workstation entry) 1. Anticipate accommodation of Service Animals Half of circulation assigned to workstation/office Following Page: Following Page: Type A B C 1 D 2 NUA '-6" 8'-6" 36"- 44" 36" '-0" 10'-6" 36"- 44" 48" '-9" 10'-0" 36"- 44" 60" 117. NAA Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 9 of 22

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11 Position Allocation B C 3 14 Hallway 30 sq. ft. Half of circulation assigned to workstation/office C Type.1 Workstation - Plan Notes Scale: 3 / 8 = 1'-0" 3" 6" 12" 24" 48" Bulbed work surface w/ chairs or free-standing table w/ chairs 2. Two-Four-drawer lateral file cabinet (locking opt) 3. Modular Panels (some may have glass inserts or rounded) 4. Work Surfaces - 24" min to 30" depth " min.. Printer (opt) dependant upon work assignment 6. Keyboard if on tray see General Notes 140 sq. ft Monitor if working with sensitive materials see General Notes. 8. Open shelving or closed storage bins 9. Pedestal configuration per storage requirements. 32" min. Hallway 42 sq. ft. A 10. Chair see General Notes 11. Insure that appropriate leg room is provided 12. Alternate entry work surfaces become an L, lateral file 36" min. 13 D 2 relocated and monitor placed perpendicular to entry. 13. Alternate PC/Monitor Location-Monitor privacy requirements. (Monitor should be perpendicular to workstation entry) Plants Caution should be used when allowing plants. 1. Anticipate accommodation of Service Animals 4 Following Page: Following Page: Type A B C 1 D 2 NUA '-0" 10'-0" 36"- 44" 36" '-0" 10'-0" 36"- 44" 48" '-0" 12'-0" 36"- 44" 60" NAA Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 11 of 22

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13 Position 6 Allocation Type A B C 1 D 2 NUA '-6" 20'-0" 36"- 44" 36" '-0" 22'-0" 36"- 44" 48" '-0" 21'-6" 36"- 44" 60" 280 NAA Width of hallway is dependant upon the calculated Occupant Load as determined by the CBC 2. Diameter of navigation area should not be less than 36". 3. Net Usable Area (NUA) refers to the footprint of the workstation (A x B). 4. Net Assignable Area (NAA) refers to the area of the workstation plus the area of the hallway (A x B) + (A x C) Scale: 3 / 8 = 1'-0" - Please refer to notes on Workstation Types 1-3" 6" 12" 24" 48" " min. 4 Hallway 60 sq. ft Half of circulation assigned to workstation/office C sq. ft. 12 D Hallway 34 sq. ft. B 32" min. Interior Wall Exterior Wall Area calculated from exterior wall surface A 1 Interior Wall Area calculated from wall center C Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 13 of 22

14 Meeting Rooms Meeting rooms range from videoconference and interview rooms up to large classrooms and conference rooms. Their size is determined by their function. Additional criteria can be found in Time-Saver Standards for Interior Design and Space Planning. Square/Rectangular/Oval/Round Tables Common Amenities 1. Dry-Marker Board 2. Overhead Video Projector 3. Sound System 4. Network Computer. Cabling for Meeting Attendees to connect to overhead projector 6. Sink/Coffee Service Counter and Storage 7. Side Tables (depending upon table and room constraints) - No Scale General Guidelines 1. Plan room for universal access 2. Access Service Animals should be considered in the layout of the conference room 3. Lighting should be placed to provide sufficient illumination over the conference table or marker board. 4. Factor in the human personal space dynamic when considering the size of the conference room. See Rules of Thumb.. To minimize glare from adjacent windows provide window coverings or tent the glazing. 6. Room entry, cabinet and storage doors shall not encroach into the Circulation Zones more than 12". 7. Walls shall be insulated to provide a Sound Transmission Class (STC) of not less than Ceiling, Floor/Ceiling assemblies shall be insulated to provide a Sound Transmission Class (STC) of not less than Round table configurations may provide opportunities for corner tables corner tables shall not encroach into Circulation Zones. 10. Wall mounted amenities may encroach into the Circulation Zone not more than 12" F Line of Wall or Obstruction Inches A B 4-6 C D 10-1 E F 36 min. G 4-60 H I J 42-1 K L Square/Rectangular Tables Round/Oval Tables Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 14 of 22

15 Round/Oval and Square Tables No Scale Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 1 of 22

16 Round/Oval and Square Tables No Scale Boat Shaped Tables Rectangular Tables Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 16 of 22

17 Video and Interview Rooms Scale: 3/8 = 1'-0" 3'-0" Projector placement is type dependent " 24" Low/Non Secure Side 3'-0" 6 36" min '-0" 12" '-0" 3" 6" 18" min. 2 60" dia. 3'-0" 4 32" clear 6 12" max. Secure Side 8 - Plan Notes 1. Video projection screen sized for projector and room. 2. Video projector placement for room dimensions 3. Solid wall construction (min of STC 41) 4. Storage cabinet or table with PC/TV/Video Equipment connected to video projector In video conference rooms only circulation zone is confined to one side. 6. Circulation Zone need only provide on two sides of the at the entry 7. Counter surface with security wall below counter 8. Five foot diameter navigation zone 9. Interview phone 10. Security glazing 11. Low or Non-Secure passage 12. Furniture or cabinet opportunity in dead corners Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 17 of 22

18 Reception Areas 1'-0" 10'-6 1/2" 1'-6" Min. 7'-1/2" 4'-0" (counter approach clear zone) 1'-6" 1'-0" (clear) 1'-6" (clear) 3'-9" (door approach clear zone) Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 18 of 22

19 Kitchen and Kitchennets Areas H 7'-1/2" 4'-0" (door approach clear zone) 7'-2 1/2" F 2 3'-9" (door approach clear zone) Door swing in direction of exit C G Fig. 1: Absolute Minimum Kitchen Area Corridor Kitchen 1 U Kitchen L Kitchen Inches A 48 min. B 40 C 1 D E 2-6 F 1 G per manfctr H 19 clear I 18 max. J K 24 L 24 M 30 N O max. P 24 Q 34 max. - Plan Notes 1. Minimum requirements of Fig. 1 apply to all reception areas. 2. Counter shall be a maximum of 24" deep and not more than 34" above the finish floor material. The under counter leg space shall be clear of any obstructions. 3. If upper cabinets are installed, insure the lower portion is within the reach zone for accessibility. 4. Counter surfaces should be as maintenance free as possible.. Refrigerator shall comply with accessibility and energy saving requirements. 6. Hatched area is require to be free from encroachment. 7. A minimum circular clear area of 60" shall be provided for accessibility Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 19 of 22

20 Copier/Work Room Areas '-7" 4'-0" (door approach clear zone) Scale: 3 / 8 = 1'-0" 3" 6" 12" 24" 48" Door swing in direction of exit 7'-6" 6 32" clear opening '-8" Fig. 1: Absolute Minimum (Enclosed) Copier Area Plan Notes '-0" Prototypical Copier/ Work Room Configuration '-0" Copier Alcove 13 2'-9" 1. Minimum requirements of Fig. 1 apply to all copier work-room areas. 2. Counter shall be a maximum of 24" deep and not more than 34" above the finish floor material. The under counter leg space shall be clear of any obstructions. 3. If upper cabinets are installed, insure the lower portion is within the reach zone for accessibility. 4. Counter surfaces should be as maintenance free as possible.. Copier/Fax/Printer device shall comply with accessibility and energy saving requirements. 6. Hatched area is require to be free from encroachment. 7. A minimum circular clear area of 60" shall be provided for accessibility. 8. Minimum sound transmission classification (STC) of 41 is required in all work room areas. 9. If additional equipment or devices are placed in the workroom, insure that proper access is provided for those with disabilities. 10. All electrical outlets that serve a Copier/Fax/Printer device shall be on a clear segregated circuit. 11. Network data jack shall conform to GS-IT requirements. 12. Provide adequate room for recycle bins. 13. For copier locations in alcoves or hallways, a minimum, clear area of 36" x 48" shall be provided directly in front of the unit Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 20 of 22

21 Library Areas 6 Scale: 3 / 8 = 1'-0" 3" 6" 12" 24" 48" Fig. 1: Absolute Minimum Clear Area 16'-0" - Plan Notes 1. Minimum requirements of Fig. 1 apply to all copier workroom areas. 2. Copier/Fax/Printer device shall comply with accessibility and energy saving requirements. 3. Hatched area is require to be free from encroachment. 4. A minimum circulation - 36" clear area.. Minimum sound transmission classification (STC) of 41 is required in all work room areas. 6. Line of nearest allowed obstruction: wall, other equipment of furniture. 7. All electrical outlets that serve a Copier/Fax/Printer device shall be on a clear segregated circuit. 8. Network data jack shall conform to GS-IT requirements. 9. Provide adequate room for recycle bins. 10. Shelving units shall be anchored both vertically and horizontally. 9 2 Library size is driven by the number of volumes to store. In no case shall the minimum clear circulation space be encroached upon. 14'-1" Space Utilization Study Appendix C: Space Allocation and Calculation Guidelines Page 21 of 22

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