IDFX Building Codes and ADA 2

Question 1

IBC Section 1004 defines 'occupant load' for egress purposes. For a business occupancy (Group B), what is the occupant load factor per person?

Accepted Answer

150 gross square feet per person

Answer

IBC Table 1004.5 assigns an occupant load factor of 150 gross square feet per occupant for business occupancies (Group B offices). This means a 3,000 SF office has an assumed occupant load of 20 persons for egress calculations.

Question 2

Under ADA Standards, what is the maximum slope allowed for an accessible ramp?

Accepted Answer

1:12 (8.33%)

Answer

ADA Standards Section 405.2 limits accessible ramp running slope to a maximum of 1:12 (one inch of rise per 12 inches of horizontal run, or 8.33%). Steeper slopes are not ADA-compliant for accessible routes.

Question 3

According to IBC Section 1010.1.9, at what maximum height above the finished floor may a door hardware operating mechanism be mounted?

Accepted Answer

48 inches AFF

Answer

IBC Section 1010.1.9 and ADA Section 309.4 both require door hardware (handles, pulls, latches, locks) to be mounted no higher than 48 inches above the finished floor to be within the reach range of wheelchair users.

Question 4

Which IBC occupancy classification applies to a nail salon?

Accepted Answer

Group B (Business)

Answer

Nail salons, beauty salons, and similar personal service establishments are classified as Group B (Business) occupancies under IBC Section 304, which covers professional services, civic uses, and personal service businesses not primarily retail in nature.

Question 5

What is the minimum number of accessible parking spaces required for a parking lot with 75 total spaces per ADA Standards Table 208.2?

Accepted Answer

3 spaces

Answer

ADA Standards Table 208.2 requires 3 accessible parking spaces for a lot with 51-75 total spaces (1 for 1-25 spaces, 2 for 26-50, 3 for 51-75, 4 for 76-100).

IDFX - Interior Design Fundamentals Exam Practice Test

IDFX - Interior Design Fundamentals Exam Practice Test

IDFX Building Codes and ADA 2