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Building Planning — ICC B2 Practice Questions

32 questions · 20% of the ICC B2 exam

Worked questions

1. A commercial building is being constructed with a floor framing system. The floor joists are spaced at 16 inches on center. Which of the following is the minimum required span for the floor joists according to the 2021 International Building Code?

  • A12 feet
  • B14 feet
  • 16 feet
  • D18 feet

Exam tip

Always refer to the specific spacing requirement when determining the minimum span for joists.

Why C is correct

According to Section 1807.3 of the 2021 IBC, the minimum span for floor joists with a spacing of 16 inches on center is 16 feet. Options A, B, and D are incorrect as they exceed the minimum span requirement.

2. A commercial building is being constructed with a floor framing system. The floor joists are spaced at 16 inches on center. Which of the following is the minimum required span for the joists, according to the 2021 International Building Code?

  • A12 feet
  • B14 feet
  • 16 feet
  • D18 feet

Exam tip

Always refer to the specific spacing requirements in the IBC for minimum span calculations.

Why C is correct

According to Section 1807.3 of the 2021 IBC, the minimum span for joists with a spacing of 16 inches on center is 16 feet. Options A, B, and D are incorrect as they exceed the minimum span requirement.

3. A commercial building is being constructed with a new HVAC system. The specifier requires a system with a high efficiency rating. Which type of HVAC system would be most suitable for this requirement?

  • ASingle-speed air conditioner
  • Variable-speed air conditioner
  • CWindow air conditioner
  • DPortable air conditioner

Exam tip

Variable-speed HVAC systems are becoming more popular due to their energy efficiency and comfort benefits.

Why B is correct

A variable-speed air conditioner is most suitable for high efficiency requirements as it can adjust its speed to match the heating or cooling needs, resulting in better energy efficiency.

4. A commercial building is being constructed with a steel deck roof assembly. The specifier requires a minimum fire resistance rating of 1 hour. Which type of fire-resistant material should be used between the steel deck and the roof insulation to meet this requirement?

  • Type X gypsum board
  • BType C gypsum board
  • CType I gypsum board
  • DType II gypsum board

Exam tip

Remember the different fire resistance ratings for various types of gypsum board and their applications.

Why A is correct

Type X gypsum board is required for a 1-hour fire resistance rating in steel deck roof assemblies. Type C is for 1/2-hour, Type I for 1-hour, and Type II for 2-hour ratings, which do not meet the specifier's requirement.

5. A commercial building is being designed with a plumbing system. The building is located in a seismic zone. What is the minimum required pressure in the water supply system according to the 2021 IBC?

  • A20 psi
  • B30 psi
  • C40 psi
  • 50 psi

Exam tip

Be aware of the specific pressure requirements for plumbing systems in seismic zones.

Why D is correct

Section 403.1.1 of the 2021 IBC specifies that the minimum required pressure in the water supply system for buildings in seismic zones is 50 psi. Options A, B, and C are incorrect as they do not meet the minimum pressure requirement.

6. A commercial building is being designed with an elevator. According to the 2021 International Building Code, what is the minimum required elevator car size for this building, considering the number of occupants?

  • A6 feet x 6 feet
  • B7 feet x 7 feet
  • 8 feet x 8 feet
  • D9 feet x 9 feet

Exam tip

Familiarize yourself with the specific accessibility requirements for different types of buildings and their respective code sections.

Why C is correct

The 2021 IBC requires a minimum elevator car size of 8 feet x 8 feet for buildings with a certain number of occupants. Options A, B, and D are incorrect as they do not meet the code requirements.

7. A commercial building is being designed with an elevator. According to the 2021 International Building Code, what is the minimum required width for the elevator lobby, if the elevator car width is 36 inches?

  • A30 inches
  • B36 inches
  • 42 inches
  • D48 inches

Exam tip

Be aware of the specific requirements for elevator lobby dimensions.

Why C is correct

Section 410.3.1 of the 2021 IBC states that the minimum width of the elevator lobby must be 42 inches if the elevator car width is 36 inches. Options A, B, and D are incorrect as they do not meet the minimum lobby width requirement.

8. An existing commercial building is being inspected for electrical compliance. The building has a lighting system that uses T8 fluorescent lamps. According to the 2021 International Building Code, what is the minimum required spacing for these lamps, measured from the center of one lamp to the center of the next lamp?

  • A4 feet
  • 5 feet
  • C6 feet
  • D7 feet

Exam tip

Understand the specific electrical code requirements for different types of lighting systems.

Why B is correct

The 2021 IBC requires a minimum spacing of 5 feet between the centers of T8 fluorescent lamps. Options A, C, and D are incorrect as they do not meet the code requirements.

23 more in the bank

Answers and explanations for these are in the app.

  • A commercial building is being constructed with a masonry wall. The wall is to be used as both a load-bearing and a fire-resistance-rated element. Which of the following is the minimum required fire-resistance rating for this wall, according to the 2021 International Building Code?
  • A commercial building is being constructed with an exterior wall system. According to the 2021 International Building Code, what is the minimum required R-value for the exterior walls, if the building is located in a climate zone with a Design Heating Load of 30 Btuh/ft²?
  • A commercial building is being designed with a fire alarm system. According to the 2021 International Building Code, what is the minimum required number of smoke detectors in a 10,000 square foot area?
  • A commercial building is being designed with a fire alarm system. Which of the following is the correct location for the fire alarm control unit according to the 2021 IBC?
  • A commercial building is being designed with a fire sprinkler system. The building has a maximum floor area of 10,000 square feet. What is the minimum number of sprinkler heads required according to the IBC?
  • A commercial building is being designed with a flat roof. The roof will be covered with a single-ply membrane. According to ACI 318-19, what is the minimum required live load for this roof, considering the membrane weight and snow load?
  • A commercial building is being designed with a steel frame. The design requires a minimum yield strength of 50 ksi for the steel beams. Which of the following types of steel beams meets this requirement according to ACI 318-19?
  • A commercial building is being designed with an automatic sprinkler system. The building is located in a high-rise area. According to the 2021 International Building Code, what is the minimum required sprinkler density for this building?
  • A commercial building is being inspected for compliance with ventilation requirements. According to the 2021 International Building Code, what is the minimum required ventilation rate for a commercial kitchen, if the area is 1,000 square feet?
  • A commercial building is being inspected for plumbing compliance. The building has a domestic water system. According to the 2021 International Building Code, what is the minimum required pressure for the water supply system, considering the elevation differences?
  • A commercial building is being inspected for structural integrity. The building has a steel frame. According to ACI 318-19, what is the minimum required yield strength for the steel used in the frame, considering the design loads?
  • An existing commercial building is being renovated. The current exit door has a clear width of 30 inches. According to the 2021 International Building Code, what is the minimum required clear width for an exit door in this building?
  • An inspector is conducting a routine inspection of the plumbing system in a commercial building. They find that the water supply piping is made of galvanized steel. What is the expected lifespan of this piping, according to the IBC?
  • An inspector is reviewing the accessibility features in a commercial building. The building has a total of 50 occupants. What is the minimum number of accessible parking spaces required according to the 2021 IBC?
  • An inspector is reviewing the accessibility features in a commercial building. They notice that the doorways are not wide enough to accommodate a wheelchair. What is the minimum width required for doorways according to the IBC for wheelchair access?
  • An inspector is reviewing the design of a flat roof on a commercial building. The roof is subject to a dead load of 120 psf and a live load of 40 psf. What is the minimum required roof live load resistance factor (R) according to ACI 318-19?
  • An inspector is reviewing the egress requirements for a commercial building. The building has a total of 100 occupants. What is the minimum width required for the main exit according to the 2021 IBC?
  • An inspector is reviewing the electrical systems in a commercial building. Which of the following is the correct type of grounding system for a building with a service over 1000 amperes according to the 2021 IBC?
  • An inspector is reviewing the exterior walls of a commercial building. They notice that the masonry walls are not properly sealed at the joints. What is the primary concern regarding this condition?
  • An inspector is reviewing the structural components of a commercial building. They notice that the steel beams have visible signs of corrosion. What is the primary concern regarding this condition?
  • During a routine inspection of a commercial building, you notice that the roof sheathing is not securely fastened. What is the minimum required fastener spacing for roof sheathing, according to the 2021 International Building Code?
  • During an inspection of a commercial building, you find that the water supply piping is made of copper. According to the 2021 International Building Code, what is the minimum required thickness for copper piping, if the working pressure is 80 psi?
  • During an inspection of an existing commercial building, you find that the electrical panel is overloaded. According to the 2021 International Building Code, what is the maximum allowable amperage for a 20-ampere circuit?

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