To determine the maximum occupant load for a bowling center with 25 lanes and 3,500 sq. ft. of additional area, we use the occupant load factor from 2021 IBC Table 1004.5.

Step 1: Calculate the Occupant Load for Bowling Lanes

IBC Table 1004.5 assigns 50 sq. ft. per person for bowling lanes and associated seating areas.

With 25 lanes, assuming 100 sq. ft. per lane (standard industry measurement for lane width and approach area):

25×(10050)=25×2=50 occupants25 \times \left( \frac{100}{50} \right) = 25 \times 2 = 50 \text{ occupants}25×(50100​)=25×2=50 occupants

Step 2: Calculate the Occupant Load for Additional Area

Additional 3,500 sq. ft. area follows a general occupant load factor of 15 sq. ft. per person (assembly without fixed seats):

3,50015=233.3 occupants≈234 (rounded)\frac{3,500}{15} = 233.3 \text{ occupants} \approx 234 \text{ (rounded)}153,500​=233.3 occupants≈234 (rounded)

Final Calculation:

50+184=234 occupants50 + 184 = 234 \text{ occupants}50+184=234 occupants

Reference to Fire Inspector Documentation:

1. 2021 International Building Code (IBC) – Table 1004.5 (Occupant Load Factor)

Bowling lanes require 50 sq. ft. per person.

Assembly areas without fixed seats use 15 sq. ft. per person.

2. 2021 International Fire Code (IFC) – Section 1004.1.2 (Areas without Fixed Seating)

When calculating occupant load, areas without fixed seating must be divided by the appropriate occupant load factor.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 125 is too low based on correct load factor calculations.

Option B (Correct): 234 is the correct calculation using IBC Table 1004.5.

Option C (Incorrect): 500 is too high based on the available space.

Option D (Incorrect): 625 significantly overestimates the actual occupant load.

Thus, the correct and verified answer is: B. 234.

IFC Section 903.3.5 and Appendix B (Fire-Flow Requirements) allow a reduction in fire flow when sprinklers are installed. For a Type II-B building (noncombustible, unprotected), the base fire flow (7,000 gpm) reflects a large, unsprinklered structure (e.g., per Table B105.1(2)). With full sprinkler protection, IFC B105.2 permits a reduction to as low as 25% of the original flow or the sprinkler demand (whichever is greater), typically 1,500 gpm for commercial buildings per NFPA 13 standards, assuming adequate water supply. Options B, C, and D exceed this minimum without justification. Thus, A is correct.

 Reference to Flammable Liquids Storage Cabinet Requirements:

According to The International Fire Code (IFC 2021), Section 5704.3.2 and NFPA 30 (Flammable and Combustible Liquids Code), Section 9.5.3, the maximum amount of Class II and Class III liquids that can be stored in a flammable liquids storage cabinet is 120 gallons.

This limit ensures safe containment, fire protection, and reduced risk of liquid ignition or spillage.

 Understanding Class II and III Liquids:

Class II liquids: Flash point between 100°F and 140°F (e.g., diesel fuel, kerosene).

Class III liquids: Flash point above 140°F (e.g., motor oil, cooking oils).

While these liquids are less volatile than Class I liquids, they still pose a fire risk, requiring proper storage in approved cabinets.

 Clarification of Incorrect Answer Choices:

A. 10 gallons → Incorrect

Too low; IFC and NFPA allow up to 120 gallons in storage cabinets.

B. 60 gallons → Incorrect

This is the maximum for Class I liquids, but Class II and III liquids are allowed up to 120 gallons.

D. 240 gallons → Incorrect

Exceeds the allowable limit per IFC 5704.3.2 and NFPA 30, which set the maximum at 120 gallons per cabinet.

 Conclusion:

The correct and verified answer is C (120 gallons) as per IFC 5704.3.2 and NFPA 30, ensuring compliance with flammable liquids storage safety standards.

A code official may allow the occupant load to exceed the building code requirements if additional exit facilities are provided, all egress requirements are met, and the maximum occupancy does not exceed one occupant per 10 sq. ft. of occupiable floor area.

Reference to Fire Inspector Documentation:

1. 2021 International Building Code (IBC) – Table 1004.5 (Occupant Load Factor)

The minimum safe occupancy load factor is 10 sq. ft. per occupant, meaning no space can have more than 1 person per 10 sq. ft.

Fire code officials can approve increased occupancy only if extra exits are provided, ensuring compliance with egress and fire safety rules.

2. 2021 International Fire Code (IFC) – Section 1004.2 (Increased Occupant Load Allowance)

Allows for an increased occupant load only if additional exits and egress requirements are met but never beyond 1 person per 10 sq. ft.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 1 occupant per 3 sq. ft. is too high and would violate egress safety regulations.

Option B (Incorrect): 1 occupant per 5 sq. ft. still exceeds safety limits.

Option C (Incorrect): 1 occupant per 7 sq. ft. is not the minimum required standard.

Option D (Correct): 1 occupant per 10 sq. ft. is the minimum limit for allowing an increased occupant load under IFC 1004.2 and IBC Table 1004.5.

Thus, the correct and verified answer is: D. 10.

A fire code official has authority to enter buildings for fire safety inspections, but they must comply with legal entry requirements. The Fourth Amendment of the U.S. Constitution and fire codes restrict entry without permission, an administrative warrant, or legal authority.

Fire code officials do NOT have the right to enter vacant buildings at any time without proper authorization.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 104.3 (Right of Entry)

IFC 104.3 states that a fire code official may only enter a building at reasonable times to conduct inspections, with consent or a legal warrant.

If entry is refused, the fire code official must obtain an administrative warrant before proceeding.

2. Fourth Amendment of the U.S. Constitution

Protects property owners from unlawful searches and seizures without proper legal authority.

Detailed Explanation of Answer Choices:

Option A (Correct): Fire code officials cannot enter vacant buildings at any time without permission or a warrant.

Option B (Incorrect): Fire code officials can enter a factory floor with permission from the owner/occupant.

Option C (Incorrect): Fire code officials can inspect public areas of malls during business hours since these spaces are open to the public.

Option D (Incorrect): Fire code officials can enter a warehouse’s interior with an administrative warrant, which is legally authorized for inspections.

Thus, the correct and verified answer is: A. Vacant buildings at any time.

Retention of Fire Inspection Records

The International Fire Code (IFC) and NFPA 1 specify that records related to fire inspections, violations, and compliance must be maintained for the lifetime of the building.

This ensures a continuous history of inspections, violations, and fire prevention measures, which is critical for enforcement, legal action, and future compliance reviews.

2. Verification of Other Options

Option B (A maximum of five years) – This is incorrect because fire records must be retained longer than five years to ensure historical tracking of fire hazards and compliance over the lifespan of a structure.

Option C (Until the building is renovated or has a change of occupancy) – Renovation or occupancy change does not eliminate past fire risks, so previous records must still be maintained. Incorrect.

Option D (At least one year or until the next fire inspection, whichever is later) – This timeframe is too short and does not comply with NFPA 1 and IFC record-keeping requirements. Incorrect.

Reference Sources:

International Fire Code (IFC) 2021 – Section 104.6 (Records)

NFPA 1: Fire Code (Records Retention Requirements)

ICC Fire Inspector II Study Guide (2021)

To determine the maximum number of students permitted in a classroom, we must follow the occupant load calculation based on the 2021 International Building Code (IBC) and International Fire Code (IFC).

Step 1: Calculate the Room Area

The classroom measures 20 ft. x 30 ft., so the total area is:

20×30=600 sq. ft.20 \times 30 = 600 \text{ sq. ft.}20×30=600 sq. ft.

Step 2: Subtract the Area Occupied by Fixed Tables

Each table measures 4 ft. x 8 ft., so its area is:

4×8=32 sq. ft. per table4 \times 8 = 32 \text{ sq. ft. per table}4×8=32 sq. ft. per table

Since there are 4 tables:

32×4=128 sq. ft. occupied by tables32 \times 4 = 128 \text{ sq. ft. occupied by tables}32×4=128 sq. ft. occupied by tables

Step 3: Determine the Usable Space for Students

600−128=472 sq. ft. available600 - 128 = 472 \text{ sq. ft. available}600−128=472 sq. ft. available

Step 4: Apply the Occupant Load Factor

According to 2021 IBC Table 1004.5 (Occupant Load Factor), the factor for a classroom with tables and chairs is 20 sq. ft. per person.

472÷20=23.6472 \div 20 = 23.6472÷20=23.6

Since the occupant load must be rounded down, the maximum number of students is 24.

Reference to Fire Inspector Documentation:

1. 2021 International Building Code (IBC) – Table 1004.5 (Occupant Load Factor)

A classroom with tables and chairs requires 20 sq. ft. per occupant.

This method ensures compliance with egress and fire safety requirements.

2. 2021 International Fire Code (IFC) – Section 1004.1 (Occupant Load Determination)

The IFC states that occupant load is based on net usable floor area and must follow IBC Table 1004.5.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 12 students would be too low based on the calculations.

Option B (Correct): 24 students is the accurate calculation following IBC 1004.5.

Option C (Incorrect): 30 students would exceed the available space per code.

Option D (Incorrect): 40 students is far above the allowed maximum.

Thus, the correct and verified answer is: B. 24.

IFC Section 2303.7 classifies ABS (acrylonitrile butadiene styrene) plastics as Group A (high-hazard) due to their flammability and smoke production, per NFPA 13. Options B and C are less hazardous, D is a commodity class, not a plastic group. Thus, A is correct.

Efficient scheduling minimizes travel time and maximizes inspection coverage, a practical aspect of fire inspection management (not explicitly detailed in the IFC but implied in Section 106.2, Inspections). Selecting occupancies in the same geographic area (C) reduces travel, allowing more time for thorough inspections. Option A undermines the comprehensive nature of inspections required by IFC Section 106.1. Option B could compromise inspection quality, not efficiency. Option D focuses on violation history, which doesn’t inherently improve scheduling efficiency and may skew priorities. Thus, C is the most logical and IFC-aligned choice.

IFC Section 108 (Board of Appeals) outlines the board’s role: it hears appeals on fire code official decisions (Section 108.1), can interpret the code (B), approve alternatives (C) per Section 104.9, and establish procedural rules (D) per Section 108.2. However, the board cannot “waive” code requirements outright (A)—it can only grant variances or approve alternatives that still meet the code’s intent, not eliminate requirements entirely. Waiving implies nullification, which exceeds the board’s authority; that power rests with the fire code official or legislative amendments. Thus, A is the exception.

High-Pile Combustible Storage Permit Requirements

According to the International Fire Code (IFC) 2021, Section 105.6.23, a permit is required for the storage of high-pile combustible stock when the storage area exceeds 2,500 square feet.

2. Definition of High-Pile Storage

High-pile storage is defined as storage of combustible materials on racks or piles exceeding 12 feet in height (or 6 feet for highly combustible materials, such as rubber and plastics).

IFC Table 3206.2 establishes fire protection requirements based on storage height, area, and commodity class.

3. Verification of Other Options

Option A (225 sq. ft.) – Incorrect, as this is far below the 2,500 sq. ft. permit threshold.

Option B (500 sq. ft.) – Incorrect, as the fire code does not require a permit at this level.

Option C (1,000 sq. ft.) – Incorrect, as the IFC specifies 2,500 sq. ft. as the threshold for requiring a permit.

Reference Sources:

International Fire Code (IFC) 2021 – Section 105.6.23 (High-Pile Combustible Storage Permit Requirements)

IFC Chapter 32 (High-Piled Storage Regulations)

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: D. 2,500. ✅

The requirement for panic hardware on exit doors is specified in 2021 IFC Section 1010.2.9 – Panic and Fire Exit Hardware.

IFC Section 1010.2.9.1 – Where Panic Hardware is Required:

Panic hardware is required for Group A (Assembly) occupancies when the occupant load is 50 or more.

It is also required in certain Group E (Educational) and Group R-1 (Hotels and Dormitories) occupancies under specific conditions.

Why Other Options Are Incorrect?

A. 10; A – The threshold for panic hardware in Group A occupancies is 50, not 10.

C. 50; M – Group M (Mercantile) does not require panic hardware unless specifically required by another section of the code.

D. 100; F – Panic hardware is not required in Group F (Factory) occupancies at 100 occupants; the threshold applies primarily to Group A.

In Group I occupancies (such as hospitals, nursing homes, and correctional facilities), keys necessary for unlocking exit doors must be individually identifiable by both sight and touch. This ensures quick identification of keys in an emergency, especially for staff members assisting occupants with limited mobility.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 1010.1.9.9 (Identifiable Keys for Exit Doors in Group I Occupancies)

IFC 1010.1.9.9 specifically states that in Group I occupancies, all keys used to unlock exit doors must be uniquely identifiable by both sight and touch.

This helps staff quickly locate and use the correct key in an emergency evacuation.

2. NFPA 101 – Life Safety Code (2021 Edition) – Section 18.2.2.2.6 (Key Identification in Institutional Occupancies)

NFPA 101 mandates that keys in healthcare and correctional facilities (Group I) must be distinguishable by touch and sight for emergency use.

Detailed Explanation of Answer Choices:

Option A (Incorrect): Group A occupancies (Assembly) do not have this requirement.

Option B (Incorrect): Group E occupancies (Educational) do not have this specific key-identification mandate.

Option C (Correct): Group I occupancies (Institutional) require individually identifiable keys per IFC 1010.1.9.9.

Option D (Incorrect): Group R occupancies (Residential, such as apartments and hotels) do not have this specific requirement.

Thus, the correct and verified answer is: C. Group I occupancies.

Understanding Type III Construction

According to the International Building Code (IBC) 2021, Section 602.3, Type III construction is a mix of noncombustible and combustible materials.

Exterior walls must be noncombustible or fire-retardant-treated wood, while interior structural elements (such as floors, roofs, and partitions) can be wood.

2. Common Uses of Type III Construction

Churches, schools, apartment buildings, and mercantile (retail) structures are often built using Type III construction because it balances fire resistance with cost-effectiveness.

Many low-rise residential and commercial buildings use this type due to its ability to support multiple stories while maintaining some fire protection.

3. Verification of Other Options

Option A (Type I) – Incorrect, as Type I construction is entirely noncombustible (steel/concrete) and used for high-rises, not typical for churches, schools, or apartments.

Option B (Type II) – Incorrect, as Type II construction is fully noncombustible but has lower fire resistance than Type I, mainly used for commercial buildings, warehouses, and low-rise offices.

Option D (Type IV) – Incorrect, as Type IV (heavy timber) is rarely used for schools and apartments, though some older churches may use it.

Reference Sources:

International Building Code (IBC) 2021 – Section 602.3 (Type III Construction Definition)

NFPA 220: Standard on Types of Building Construction

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: C. Type III. ✅

Fire-Resistance Rating for Nonbearing Walls in Type IV Construction

Type IV (Heavy Timber) construction, as defined by the International Building Code (IBC) 2021, Section 602.4, consists of large, solid or laminated wood members.

Interior nonbearing walls and partitions in Type IV construction are not required to have a fire-resistance rating (0 hours) unless they separate different occupancies or are specifically mandated by another code provision.

2. Why Type IV Does Not Require a Rating for Nonbearing Walls

The heavy timber components inherently provide fire resistance due to their large cross-section, which chars on the surface and slows fire penetration.

IBC Table 601 confirms that interior nonbearing walls in Type IV construction do not have a required fire-resistance rating.

3. Verification of Other Options

Option B (1 hour) – Incorrect, as Type IV does not require a 1-hour rating for interior nonbearing walls unless specific conditions apply.

Option C (1-1/2 hours) – Incorrect, as there is no code requirement for this level of rating in Type IV nonbearing walls.

Option D (2 hours) – Incorrect, as Type IV walls are not rated unless separating occupancies.

Reference Sources:

International Building Code (IBC) 2021 – Section 602.4 (Type IV Construction Requirements)

IBC Table 601 (Fire-Resistance Ratings for Building Elements)

ICC Fire Inspector II Study Guide (2021)

 Reference to Fire-Flow Requirements for Type IIB Buildings:

The International Fire Code (IFC 2021), Appendix B, Table B105.1(2) establishes the minimum fire-flow requirements for buildings based on construction type, size, and the presence of sprinkler systems.

For a 75,000 sq. ft. Type IIB (non-combustible, unprotected) building without sprinklers, the required fire-flow is 5,500 gpm for 4 hours.

 Why Fire-Flow Matters:

Fire-flow ensures that sufficient water is available to control and extinguish fires in large buildings.

Type IIB buildings lack built-in fire resistance enhancements, making adequate fire-flow crucial.

 Clarification of Incorrect Answer Choices:

A. 3,000 gpm for 3 hours → Incorrect

Too low for a building of this size and construction type.

B. 4,000 gpm for 4 hours → Incorrect

Below the required 5,500 gpm per IFC Appendix B.

D. 5,750 gpm for 4 hours → Incorrect

Slightly above the requirement but not the exact minimum mandated by IFC Table B105.1(2).

 Conclusion:

The correct and verified answer is C (5,500 gpm for 4 hours) as per IFC Appendix B, Table B105.1(2), ensuring compliance with fire-flow standards for Type IIB buildings without sprinklers.

Refrigeration systems and units are regulated under IFC 2021, Section 605 – Refrigeration Equipment, and the requirement for emergency signs, charts, and labels is tied to the NFPA 704 Hazardous Materials Identification System.

IFC 2021, Section 605.12.3 – Signage for Refrigeration Systems:

States that approved emergency signs, charts, and labels must be provided when the refrigerant quantity exceeds 220 pounds for Group A1 refrigerants.

Definition of Group A1 Refrigerants (Low Toxicity, Low Flammability):

Examples include R-134a, R-410A, and R-22, which are commonly used in commercial and industrial HVAC systems.

Why Other Options Are Incorrect?

A. 30 lb. – Too low; labeling requirements do not apply at this threshold.

B. 100 lb. – Incorrect; the IFC requirement specifies 220 lb.

C. 200 lb. – Close, but still below the 220 lb. threshold.

Foamed plastics or materials containing foamed plastics used for stage scenery must meet strict fire performance requirements to prevent rapid flame spread and fire hazards in assembly occupancies.

The correct fire test standard for these materials is UL 1975 – Standard for Fire Tests for Foamed Plastics Used for Decorative Purposes.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 807.4.2 (Foamed Plastics for Stage Scenery)

IFC 807.4.2 states that foamed plastics used in scenery must be tested and approved per UL 1975 to ensure fire safety.

2. UL 1975 – Standard for Fire Tests for Foamed Plastics Used for Decorative Purposes

This standard evaluates the flammability and smoke production of foamed plastics used in decorative applications, including stage scenery.

Detailed Explanation of Answer Choices:

Option A (Correct): UL 1975 is the required test standard for foamed plastics used in stage scenery, ensuring compliance with IFC 807.4.2.

Option B (Incorrect): NFPA 11A deals with foam-water fire suppression systems, not foamed plastics for decorative use.

Option C (Incorrect): CPSC 16CFR relates to consumer product safety regulations but does not address fire safety for foamed plastics on stage scenery.

Option D (Incorrect): ASTM D 1784 is a test for rigid PVC plastics and does not apply to foamed plastics used for stage scenery.

Thus, the correct and verified answer is: A. UL 1975.

 Reference to Occupant Load Calculation:

The International Fire Code (IFC 2021), Section 1004.2 states that the calculated occupant load of a building may be increased if all other life safety provisions are met.

However, the occupant load cannot exceed one person per 5 square feet when increased beyond the standard calculations.

 Fire Safety Considerations for Increased Occupant Load:

Increasing the occupant load requires ensuring:

Egress capacity (number and width of exits) meets the increased load.

Fire protection systems (sprinklers, alarms, etc.) are adequate for the new load.

Proper ventilation and sanitation facilities are maintained.

IFC 1004.2 and NFPA 101 both enforce the maximum limit of 1 occupant per 5 square feet in modified occupant load scenarios.

 Clarification of Incorrect Answer Choices:

A. 3 sq. ft. → Incorrect

Too small for safe egress and occupant movement; the code does not allow such high density in general occupancies.

C. 7 sq. ft. → Incorrect

While some occupancies have higher space-per-occupant allowances, 5 sq. ft. is the maximum density permitted when increasing load.

D. 15 sq. ft. → Incorrect

15 sq. ft. per person is for lower-density assembly and business occupancies, not for maximum occupant load increases.

 Conclusion:

The correct and verified answer is B (5 sq. ft. per occupant) as per IFC 1004.2 and NFPA 101, which govern occupant load increases in buildings.

In automobile refinishing spray booths where drying by heat occurs inside the same spray booth, fire codes require interlocks to prevent ignition hazards.

Before activating the drying apparatus, the ventilation system must purge the booth of spray vapors for at least 5 minutes to remove flammable concentrations.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 2404.7.3 (Drying Operations in Spray Booths)

IFC 2404.7.3 mandates that spray booths must have interlocks to purge vapors for a minimum of 5 minutes before activating the drying process.

This ensures that flammable vapors are removed before heat sources operate, reducing fire risks.

2. NFPA 33 – Standard for Spray Application Using Flammable or Combustible Materials (2021 Edition) – Section 15.4.6

NFPA 33, Section 15.4.6 confirms the requirement for a 5-minute ventilation purge cycle before heat drying.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 2 minutes is insufficient for adequate vapor removal.

Option B (Incorrect): 3 minutes does not meet the minimum safety requirement.

Option C (Incorrect): 4 minutes is slightly below the code-mandated requirement.

Option D (Correct): 5 minutes is the minimum required purge time per IFC 2404.7.3 and NFPA 33.

Thus, the correct and verified answer is: D. 5.

According to the 2021 International Fire Code (IFC) and the International Building Code (IBC) Section 1014.3, handrails are categorized into Type I and Type II based on their shape and size requirements.

Type I handrails refer to those that are not circular in shape but still comply with graspability requirements.

IBC Section 1014.3.1 states that:

If a handrail is not circular, it must have a perimeter dimension between 4 inches (minimum) and 6.25 inches (maximum).

The cross-section of such a handrail should provide an adequate grasping surface.

✅ Correct Answer: D. 6.25 inches

 Reference to ICC Fire Code and Legal Authority:

The International Fire Code (IFC) and Standard Inspection Procedures establish that fire inspectors must either obtain consent from the occupant or acquire an inspection warrant if entry is denied.

IFC Section 104.3 (Right of Entry) states that inspectors have the authority to enter a building at reasonable times to conduct an inspection, but if entry is refused, a warrant must be obtained.

 Legal and Ethical Considerations:

Fourth Amendment Rights protect against unlawful searches, requiring inspectors to either:

Gain voluntary consent from the occupant, OR

Obtain an inspection warrant if the occupant refuses entry.

Prior notice is not always required, but if the occupant is unavailable or uncooperative, legal measures must be taken.

 Clarification of Incorrect Answer Choices:

A. must give prior notice to the occupant → Incorrect

While prior notice is sometimes given as a courtesy, it is not legally required for routine inspections unless mandated by local ordinances.

B. need not give prior notice of the inspection to the occupant → Incorrect

While prior notice may not be required, entry still requires consent or a warrant. This answer does not fully address the legal requirement for an inspection warrant if entry is denied.

C. must provide the occupant with at least 24 hours of advance notice → Incorrect

No universal 24-hour notice rule exists under the IFC unless specified by local regulations.

 Conclusion:

The correct and verified answer is D because fire inspectors must either give prior notice to the occupant or obtain an inspection warrant if entry is refused (IFC Section 104.3).

Definition of Extra-High-Rack Combustible Storage

According to International Fire Code (IFC) 2021, Section 3206.6, extra-high-rack combustible storage is defined as:

Class I, II, III, or IV commodities stored on racks exceeding 40 feet in height.

High-hazard commodities stored on racks exceeding 30 feet in height.

2. Understanding Rack Storage Classifications

Class I-IV Commodities: These refer to general, moderate-risk combustible materials such as wood, paper, and plastics.

High-Hazard Commodities: These are materials that have a higher fire risk, such as highly combustible plastics, flammable solids, and products prone to rapid heat release.

3. Verification of Other Options

Option A (20; 30) – Incorrect, as 40 feet is the correct threshold for Class I-IV commodities.

Option B (30; 40) – Incorrect, as 30 feet applies to high-hazard commodities, not Class I-IV commodities.

Option D (50; 40) – Incorrect, as the correct heights are 40 feet and 30 feet, respectively.

Reference Sources:

International Fire Code (IFC) 2021 – Section 3206.6 (Definition of Extra-High-Rack Storage)

NFPA 13: Standard for the Installation of Sprinkler Systems (High-Rack Storage Requirements)

ICC Fire Inspector II Study Guide (2021)