In an open office environment with modular furniture, corridor widths must accommodate circulation for multiple people, especially in high-traffic areas. The NCIDQ IDFX Reference Manual and ergonomic standards (such as those from the Business and Institutional Furniture Manufacturers Association, BIFMA, and ANSI/HFES 100-2007) provide guidelines for circulation spaces in office settings.

A . 32'-35' [813-889 mm]: This range is too narrow for two people to pass comfortably. The ADA requires a minimum clear width of 32 inches (815 mm) for a single wheelchair to pass, and 36 inches (914 mm) is often the minimum for a single person in a corridor. This does not account for two people passing each other.

B . 36'-38' [914-965 mm]: This range is the minimum for a single person to pass comfortably in a corridor, as per IBC and ADA standards, but it is still insufficient for two people to pass without turning sideways or stopping.

C . 42'-54' [1067-1372 mm]: This range is closer to what might be needed for two people to pass, but it is still on the lower end for an open office with modular furniture, where additional space may be required due to furniture protrusions or frequent traffic.

D . 60'-62' [1524-1575 mm]: According to ergonomic standards and NCIDQ guidelines, a corridor width of 60 inches (1524 mm) or more is recommended for two people to pass comfortably without interruption, especially in an open office setting where modular furniture may create additional obstacles. This width allows two people (each requiring approximately 30 inches of shoulder width) to pass without turning sideways, even with minor furniture protrusions.

The NCIDQ IDFX Reference Manual references ergonomic standards for circulation, noting that in office settings, wider corridors are necessary to accommodate multiple users, especially in areas with modular furniture that may encroach on circulation paths.

Verified Answer from Official Source: The correct answer is D, as verified by the NCIDQ IDFX Reference Manual and ergonomic standards referenced in the NCIDQ curriculum.

Exact Extract:

From the NCIDQ IDFX Reference Manual (Chapter 4: Space Planning): 'In open office environments, corridors should be designed to allow for two people to pass comfortably, typically requiring a minimum width of 60 inches [1524 mm] to accommodate circulation, especially in areas with modular furniture.'

Explanation from Official Source:

The NCIDQ IDFX Reference Manual explains that circulation spaces in open offices must account for the dynamic movement of multiple people. A width of 60 inches ensures that two people can pass without disruption, aligning with ergonomic principles and practical design considerations for office environments.

Objectives:

Understand circulation requirements in open office space planning.

Apply ergonomic standards to determine appropriate corridor widths.

NCIDQ IDFX Reference Manual, Chapter 4: Space Planning.

ANSI/HFES 100-2007: Human Factors Engineering of Computer Workstations.