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ICC 64 practice questions

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Question 1General Building Code Knowledge

Under the International Building Code, what is the primary purpose of establishing an occupancy classification for a building or portion of a building?

  1. To fix the number of parking spaces required by the zoning ordinance
  2. To establish the contractor licensing tier required to perform the work
  3. To set the property tax assessment rate applied by the local jurisdiction
  4. To determine the construction type, allowable height and area, and life-safety features applicable to that use Correct answer.

Explanation

Occupancy classification groups spaces by the character of the hazard and the expected occupant load, which then drives construction type, allowable height and area, egress, and fire protection requirements. Zoning, taxation, and licensing are governed by other codes or ordinances, not by the IBC occupancy chapter.

Question 2General Building Code Knowledge

A building contains a room used for the storage of goods that are not highly combustible and are stored at ordinary heights. Which occupancy classification most directly applies to that room?

  1. Group S-2 Correct answer.
  2. Group E
  3. Group A-3
  4. Group H-1

Explanation

Group S-2 covers low-hazard storage, including noncombustible goods and combustible goods stored at ordinary heights. Group S-1 is reserved for moderate-hazard storage with more combustible contents or higher piled storage.

Question 3General Building Code Knowledge

In the IBC, what does the term 'occupant load' represent?

  1. The number of vehicles that can be parked in the building's garage
  2. The weight of occupants used to size the structural floor system
  3. The maximum number of employees the building owner expects to hire
  4. The total number of persons for whom means of egress and other life-safety features must be designed Correct answer.

Explanation

Occupant load is computed from the floor area divided by the occupant load factor for the use, and it establishes the required egress width, number of exits, and plumbing fixture counts. It is a life-safety design value rather than a staffing or parking figure.

Question 4General Building Code Knowledge

Which of the following is classified as a Group B occupancy under the IBC?

  1. A nightclub with a dance floor and stage
  2. A one-family dwelling
  3. A facility that manufactures flammable liquids
  4. A bank lobby open to the public for transactions Correct answer.

Explanation

Group B covers business uses such as offices, banks, and professional services where the occupants are primarily engaged in office or service work. Nightclubs are assembly, dwellings are residential, and flammable liquid manufacturing is a high-hazard use.

Question 5General Building Code Knowledge

What is the purpose of the IBC's 'type of construction' classification?

  1. To indicate the combustibility of the structural elements and the fire-resistance ratings they must achieve Correct answer.
  2. To describe the architectural style of the building facade
  3. To establish the minimum ceiling height in habitable rooms
  4. To specify the seismic design category of the site

Explanation

Construction types I through V describe whether structural elements are of noncombustible or combustible materials and the fire-resistance rating required for each element. This classification works together with occupancy and allowable area to set the permitted building size.

Question 6General Building Code Knowledge

The IBC defines the 'means of egress' as a continuous and unobstructed path of travel from any point in a building to a public way, composed of which three parts?

  1. Corridor, stairway, and elevator
  2. Exit access, exit, and exit discharge Correct answer.
  3. Occupant load, travel distance, and dead end
  4. Lobby, vestibule, and sidewalk

Explanation

The means of egress is divided into exit access (the path to the exit), the exit itself, and exit discharge (the path from the exit to the public way). Each segment has its own requirements for width, enclosure, and travel distance.

Question 7General Building Code Knowledge

A building's floor is occupied by a retail sales area. For the purpose of sizing exits, how is the required egress width generally determined?

  1. By dividing the floor area by the ceiling height
  2. By multiplying the occupant load by the egress capacity factor for the type of egress component Correct answer.
  3. By measuring the longest diagonal dimension of the floor
  4. By counting the number of sprinkler heads on the floor

Explanation

Required egress width is calculated by applying the appropriate capacity factor, expressed in inches per occupant, to the occupant load served by each egress component. Stairs and other components can have different factors, and the resulting width is subject to minimums.

Question 8General Building Code Knowledge

Within the IBC, what does a 'fire area' represent?

  1. The footprint of the largest single room in a building
  2. The area of a building within the property setback lines
  3. The aggregate floor area enclosed and bounded by fire walls, fire barriers, exterior walls, or horizontal assemblies Correct answer.
  4. The area protected by a single automatic sprinkler riser

Explanation

A fire area is the total floor area bounded by fire-resistance-rated elements such as fire walls, fire barriers, and horizontal assemblies, and it is used for limits on area and for certain sprinkler and detection thresholds. It is not the same as a single room or a sprinkler zone.

Question 9General Building Code Knowledge

A four-story office building of Type IIB construction has an occupant load of 320 persons on the largest floor. Which factor most directly determines the minimum number of exits required from that floor?

  1. The occupant load served and the number of exits permitted by the code based on that load Correct answer.
  2. The number of windows on the floor's exterior wall
  3. The number of elevators serving the floor
  4. The building's distance from the nearest fire station

Explanation

The number of required exits is tied to the occupant load and the story, with additional exits required as the load increases beyond specified thresholds. Elevators, fire station distance, and window counts do not govern the required exit count.

Question 10General Building Code Knowledge

In a building required to have two or more exits, what is the purpose of the 'exit access travel distance' limitation?

  1. To limit the length of the building's exterior facade
  2. To set the maximum distance between sprinkler heads
  3. To determine the required width of the public sidewalk
  4. To limit how far an occupant must travel to reach an exit before conditions become untenable Correct answer.

Explanation

Travel distance limits the distance from the most remote point in a story to an exit, reflecting the time needed to reach a protected path. The allowable distance varies with occupancy and whether the building is sprinklered.

Question 11General Building Code Knowledge

A corridor in a building serves as part of the exit access and must be fire-resistance rated. Which term describes the rating assigned to the corridor's walls and opening protectives?

  1. The corridor's sound transmission class rating
  2. The corridor's fire-resistance rating, expressed in hours, based on the occupancy and sprinkler protection Correct answer.
  3. The corridor's structural live load rating
  4. The corridor's vapor barrier rating

Explanation

Corridor walls and opening protectives are assigned a fire-resistance rating in hours that depends on the occupancy group, the occupant load served, and whether the building is sprinklered. Sound, structural, and moisture ratings are separate performance measures.

Question 12General Building Code Knowledge

What is the role of a 'horizontal exit' in a means of egress system?

  1. It provides a direct path from an upper floor to the exterior grade by way of a chute
  2. It is an opening in the roof used for smoke venting
  3. It is the elevator lobby that serves as the primary exit from a floor
  4. It allows occupants to pass through a fire-resistance-rated wall or floor assembly into an area of refuge on the same or another level Correct answer.

Explanation

A horizontal exit uses a rated separation to move occupants into an adjacent protected area rather than down stairs, and it can count toward the required number of exits when designed properly. The refuge area must be sized to hold the occupants transferred into it.

Question 13General Building Code Knowledge

A building official is reviewing whether a proposed assembly space needs a fire alarm system. Which combination of factors most directly governs that determination?

  1. The occupancy group, the occupant load, and whether the building is equipped with automatic sprinklers Correct answer.
  2. The number of parking spaces and the size of the loading dock
  3. The color scheme of the interior finishes and the building's signage
  4. The building's proximity to a river or floodplain

Explanation

Fire alarm and detection requirements are keyed to occupancy, occupant load thresholds, and the presence of sprinklers, among other factors. Finishes, parking, and floodplain location do not drive the alarm requirement.

Question 14General Building Code Knowledge

Under the IBC, what is the purpose of required 'fire separation distance' between a building and the lot line?

  1. To determine the required number of accessible parking spaces
  2. To set the minimum distance between the building and a public sewer line
  3. To guarantee a minimum amount of sunlight reaches the building's windows
  4. To limit the exposure of the building to fire from adjacent property and to establish the basis for exterior wall fire-resistance and opening protection Correct answer.

Explanation

Fire separation distance is measured from the building exterior wall to the lot line, centerline of a street, or other reference, and it determines the permitted wall construction and opening protection based on exposure risk. It also contributes to allowable area calculations.

Question 15General Building Code Knowledge

An architect is designing a stairway serving an assembly occupancy. Which requirement must the design satisfy for the stair to serve as part of the means of egress?

  1. The stair must be constructed entirely of glass to provide visibility
  2. The stair must be located within the building's central core in all cases
  3. The stair must be equipped with a standpipe regardless of building height
  4. The stair must be enclosed with fire-resistance-rated construction where required and provide the minimum width and handrails for the occupant load Correct answer.

Explanation

Interior exit stairs must be enclosed with rated construction where the code requires it and must provide adequate width, treads, risers, and handrails for the served occupant load. Glass construction and core location are not code requirements, and standpipes apply only under specified conditions.

Question 16General Building Code Knowledge

What does the IBC term 'accessible route' require in a building?

  1. A walkway that must be located outdoors along the property line
  2. A path reserved exclusively for emergency responders
  3. A route limited to the building's main entrance and lobby
  4. A continuous, unobstructed path connecting accessible elements and spaces that complies with the accessibility provisions Correct answer.

Explanation

An accessible route is a continuous path that connects accessible entrances, spaces, and elements and meets the technical requirements of the accessibility chapter and referenced standard. It is not limited to the entrance or reserved for responders.

Question 17General Building Code Knowledge

A building is proposed with a floor area and height that exceed the base limits for its occupancy and construction type. Which approach does the IBC permit to increase the allowable area?

  1. Adding a mezzanine that is counted as a separate story
  2. Frontage increase based on the building's open perimeter adjacent to a public way or open space Correct answer.
  3. Reducing the number of exits to lower the occupant load
  4. Increasing the building's parking capacity

Explanation

The allowable area can be increased through the frontage increase provisions, which credit open perimeter adjacent to streets or open space, and through the use of fire walls that create separate buildings. Mezzanines, exit reductions, and parking do not increase allowable area.

Question 18General Building Code Knowledge

What is the function of a 'fire wall' as distinguished from a 'fire barrier' in the IBC?

  1. A fire wall is used only in residential occupancies, while a fire barrier is used only in assembly occupancies
  2. A fire wall provides smoke control, while a fire barrier provides acoustic separation
  3. A fire wall divides a building into separate buildings for purposes of allowable area and height, while a fire barrier provides a rated separation within a single building Correct answer.
  4. A fire wall is a non-rated decorative partition, while a fire barrier is always rated

Explanation

A fire wall is structurally designed to allow collapse on either side without damaging the other portion and creates two separate buildings for code purposes. A fire barrier is a rated assembly that separates spaces but does not create separate buildings.

Question 19General Building Code Knowledge

Which condition most directly requires the installation of an automatic sprinkler system in a building under the IBC?

  1. The occupancy group, building height, fire area, or specific use triggers identified in the code Correct answer.
  2. The presence of a decorative fountain in the lobby
  3. The building's orientation relative to true north
  4. The number of tenant spaces leased to different businesses

Explanation

Sprinkler requirements are triggered by factors such as occupancy classification, building height, fire area thresholds, and specific hazardous uses. Decorative features, orientation, and tenant count do not independently trigger sprinkler requirements.

Question 20General Building Code Knowledge

In the IBC, what is the purpose of a 'smoke barrier'?

  1. To prevent water infiltration through exterior walls
  2. To provide structural support for the roof assembly
  3. To restrict the movement of smoke and maintain a tenable environment in adjacent areas during a fire Correct answer.
  4. To limit the transmission of sound between dwelling units

Explanation

A smoke barrier is a continuous membrane or assembly designed to resist the passage of smoke and is used to protect means of egress and areas of refuge. It is distinct from structural, acoustic, and weather-barrier functions.

Question 21General Building Code Knowledge

A designer is evaluating a proposed mezzanine within a single-story retail building. Which statement best reflects how the IBC treats a mezzanine?

  1. A mezzanine eliminates the need for any egress from the level below
  2. A mezzanine always counts as a full story for height and area purposes
  3. A mezzanine is permitted only in high-hazard occupancies
  4. A mezzanine is an intermediate level within a story and is generally not counted as a story if it meets the area and egress conditions of the code Correct answer.

Explanation

Mezzanines are intermediate levels that, when they comply with the code's area and other limitations, are not counted as stories for building height and area. They still require code-compliant egress and are permitted in many occupancies, not only high-hazard ones.

Question 22General Building Code Knowledge

Two exits are provided from a room, but their locations allow the paths to converge before reaching a protected exit. Which principle must the designer apply to evaluate this arrangement?

  1. The exits must be replaced by a single wider exit to simplify travel
  2. The exits are acceptable if the room is sprinklered, regardless of location
  3. The exits may be placed side by side as long as each has a door
  4. The exits must be arranged so that a fire or smoke condition does not block both paths, which is addressed by the exit remoteness provisions Correct answer.

Explanation

Where two exits are required, the code requires them to be remote from one another so that a single fire event cannot block both paths. The remoteness provisions address the separation distance and the geometry of the exit access paths.

Question 23General Building Code Knowledge

A mixed-occupancy building contains a Group A-2 restaurant and a Group B office area that are not separated by a fire barrier. Which approach does the IBC allow for determining the applicable height and area limits?

  1. The building must always be classified as a high-hazard occupancy when occupancies are mixed
  2. The building may ignore the area limits because it contains more than one occupancy
  3. The building may be treated as a single occupancy using the most restrictive requirements, or the occupancies may be separated as required to apply each independently Correct answer.
  4. The building must be divided so that each occupancy is a separate building by fire walls in every case

Explanation

For mixed occupancies, the code permits either treating the building as a single occupancy based on the most restrictive provisions or separating the occupancies with rated construction so each is evaluated independently. Fire walls are not mandatory in every mixed-occupancy case.

Question 24General Building Code Knowledge

An interior exit stairway in a high-rise building must maintain its integrity during a fire. Which feature is most critical to preserving the stair enclosure's function?

  1. Placement of storage cabinets within the stair landing
  2. Installation of decorative wall coverings inside the stair
  3. Protection of openings with fire-rated assemblies and maintenance of the required fire-resistance rating of the enclosure Correct answer.
  4. Use of operable windows in the stair enclosure for ventilation

Explanation

The integrity of an exit stair enclosure depends on maintaining its fire-resistance rating and protecting openings with rated doors and assemblies. Decorative coverings, operable windows, and storage in the stair can compromise the enclosure and are generally restricted or prohibited.

Question 25General Building Code Knowledge

A building official must determine whether a proposed structure qualifies as a 'high-rise building' under the IBC. Which criterion is used?

  1. The number of parking levels below grade
  2. The total number of dwelling units in the building
  3. The distance from the building to the nearest hydrant
  4. The building's height measured to the floor of the highest occupied story compared with the code's high-rise threshold Correct answer.

Explanation

The IBC defines a high-rise building by a height threshold measured to the floor of the highest occupied story, which triggers additional requirements such as fire command centers and standby power. Parking levels, dwelling unit counts, and hydrant distance are not the defining criterion.

Question 26General Building Code Knowledge

Under the International Building Code, how is 'occupant load' defined for a given space?

  1. The number of persons for which the means of egress is designed Correct answer.
  2. The number of employees present during the largest single work shift
  3. The total number of building occupants permitted by the certificate of occupancy
  4. The maximum number of persons a space is designed to hold based on its use and floor area

Explanation

Occupant load is the number of persons for which the means of egress of a building or portion of it is designed. It is computed from the floor area divided by the occupant load factor for the use, or from actual counts where the code permits them.

Question 27General Building Code Knowledge

A room in a business occupancy is used as a storage area with occupant load computed by the applicable factor. Which factor group does the code list for business use?

  1. 100 gross Correct answer.
  2. 15 net
  3. 300 gross
  4. 50 net

Explanation

Table 1004.5 assigns business use an occupant load factor of 100 gross square feet per occupant. Gross factors are applied to the overall floor area, while net factors apply only to the usable area of the space.

Question 28General Building Code Knowledge

A building contains a Group B office of 8,000 square feet and a Group M sales area of 4,000 square feet. Using the standard factors of 100 gross for business and 30 gross for mercantile, what is the combined occupant load?

  1. 120 occupants
  2. 160 occupants
  3. 240 occupants
  4. 213 occupants Correct answer.

Explanation

Business contributes 8,000/100 = 80 occupants and mercantile contributes 4,000/30 = 133 occupants, for a combined load of 213. The loads are computed separately by use and then added.

Question 29General Building Code Knowledge

Which statement correctly describes how the IBC classifies a building's occupancy group?

  1. The occupancy group is determined solely by the number of exits provided
  2. The occupancy group is assigned by the fire department after construction
  3. The occupancy group reflects the building's construction type and height
  4. The occupancy group is based on the purpose for which the building or space is used Correct answer.

Explanation

Chapter 3 classifies structures into occupancy groups according to the purpose for which they are used or intended to be used. Construction type and height affect allowable area and height, not the occupancy classification itself.

Question 30General Building Code Knowledge

A building houses a day-care facility caring for more than five children who are older than 2 1/2 years of age. Into which occupancy group does the IBC place this use?

  1. Group A-3
  2. Group R-3
  3. Group I-4
  4. Group E Correct answer.

Explanation

A day-care facility providing care for more than five children older than 2 1/2 years is classified as Group E, the educational occupancy. Smaller or younger-child facilities fall under Group I-4 instead.

Question 31General Building Code Knowledge

What does the IBC term 'incidental use area' describe?

  1. An unoccupied mechanical penthouse above the highest occupied floor
  2. A space that is accessory to the main occupancy and is subject to separation or protection requirements Correct answer.
  3. A room used only for storage of maintenance equipment and supplies
  4. A space whose use is temporary and therefore exempt from egress requirements

Explanation

Incidental use areas are accessory spaces such as boiler rooms or storage rooms that the code lists in Table 509 and requires to be separated from the main occupancy or protected in another specified manner. The separation protects the primary occupancy from hazards in the accessory space.

Question 32General Building Code Knowledge

In the IBC, what does 'Type VA' construction mean?

  1. Protected wood-frame construction with a one-hour fire-resistance rating for structural elements Correct answer.
  2. Heavy timber construction with noncombustible exterior walls
  3. Unprotected noncombustible construction
  4. Protected noncombustible construction with two-hour structural protection

Explanation

Type V construction is the wood-frame category, and the 'A' suffix denotes protected construction in which the structural members have at least a one-hour fire-resistance rating. Type VB is the unprotected wood-frame counterpart.

Question 33General Building Code Knowledge

A building of Type IIB construction is proposed in a Group B occupancy. Which statement best describes the role of Table 503 in the design?

  1. It determines the required number of plumbing fixtures for the occupancy
  2. It sets the maximum allowable height and building area for the occupancy and construction type Correct answer.
  3. It specifies the required fire flow for the site's water supply
  4. It establishes the minimum fire-resistance ratings for structural members

Explanation

Table 503 lists the allowable height in stories and feet and the allowable building area per story for each occupancy group combined with each construction type. The designer then applies the area-increase provisions of Chapter 5 where permitted.

Question 34General Building Code Knowledge

An interior nonbearing partition separates two tenant spaces within a single Group B occupancy on one floor. Which requirement most directly applies to this partition under the IBC?

  1. It must be a smoke partition rated where required by the tenant separation provisions Correct answer.
  2. It must be a fire barrier rated for the fire area it separates
  3. It must be a noncombustible partition with no required fire-resistance rating
  4. It must be a fire wall with a two-hour rating and structural independence

Explanation

Tenant separations in covered mall and similar situations, as well as demising partitions between tenants, are typically addressed as smoke partitions or fire partitions with a rating tied to the applicable section. A fire wall is reserved for dividing a building into separate buildings.

Question 35General Building Code Knowledge

Under the IBC, what is a 'fire area' used to determine?

  1. The area within which occupants can travel before reaching an exit
  2. The area of a building that must be provided with automatic sprinklers
  3. The total floor area of a building for purposes of allowable area
  4. The area enclosed by walls and floor/ceiling assemblies that separates it from other areas for code provisions Correct answer.

Explanation

A fire area is the aggregate floor area enclosed and bounded by fire walls, fire barriers, exterior walls, or horizontal assemblies. The code uses fire area to apply limits on size, to require sprinklers, and to set other protection thresholds.

Question 36General Building Code Knowledge

A designer is placing a required exit sign in a corridor. Which principle governs where exit signs must be provided and how they must be illuminated?

  1. Signs must be placed at every door and illuminated only by natural light
  2. Signs may be omitted where the path of egress is obvious to occupants
  3. Signs are required only in assembly occupancies with more than 100 occupants
  4. Signs must be visible from any point in the corridor and illuminated by a reliable source Correct answer.

Explanation

Section 1013 requires exit signs to be placed so that they are visible from any point in the exit access and to be internally or externally illuminated by a reliable source. The purpose is to make the egress path identifiable under both normal and emergency conditions.

Question 37General Building Code Knowledge

A corridor serving a Group R-2 apartment building must provide a certain egress width. Which factor determines the minimum required width?

  1. The construction type of the building
  2. The occupant load of the spaces served, multiplied by the egress capacity factor Correct answer.
  3. The corridor's length measured to the nearest exit
  4. The number of dwelling units on the floor divided by two

Explanation

Required egress width is determined by multiplying the occupant load served by the capacity factor from Table 1005.3.2, subject to the minimum width required for corridors in the applicable occupancy.

Question 38General Building Code Knowledge

A stairway in a building must have a minimum headroom clearance measured vertically from the stair tread nosing line. What is the required clearance?

  1. 7 feet 0 inches
  2. 7 feet 6 inches
  3. 6 feet 8 inches Correct answer.
  4. 6 feet 4 inches

Explanation

Section 1011 requires a headroom of not less than 6 feet 8 inches measured vertically from the sloped plane adjoining the tread nosing or from the floor surface of the landing. This clearance must be maintained along the entire path of travel on the stairway.

Question 39General Building Code Knowledge

A building's exit enclosure must resist fire from the interior. Which assembly is generally required to enclose an interior exit stairway in a building of Type IB construction?

  1. A one-hour enclosure only where the stairway serves more than four stories
  2. A one-hour fire-resistance-rated enclosure
  3. A nonrated enclosure with smoke detection only
  4. A two-hour fire-resistance-rated enclosure Correct answer.

Explanation

Section 1023 requires interior exit stairways to be enclosed in fire-resistance-rated construction, with the rating determined by the building's construction type and height. For Type IB construction the enclosure is generally two hours.

Question 40General Building Code Knowledge

What is the purpose of the IBC's requirements for 'accessible means of egress'?

  1. To mandate that all exits be located within 200 feet of an accessible entrance
  2. To require elevators in every building over two stories
  3. To ensure that exit signs are provided in Braille at every exit
  4. To provide a continuous accessible path from the occupied space to a public way or area of refuge Correct answer.

Explanation

Accessible means of egress provide a continuous accessible path of travel from any point in a building to a public way, which may include an area of refuge or an exterior area for assisted rescue. The provisions integrate accessibility with egress so that persons with disabilities can evacuate or await assistance.

Question 41Building Planning and Occupancy Classification

Under the IBC, which condition most directly establishes that a building or portion of a building is a separate occupancy for classification purposes?

  1. The space is separated from adjacent areas by a full-height noncombustible partition
  2. The space is used for a purpose that is listed as a distinct occupancy group in Chapter 3 Correct answer.
  3. The space contains more than one tenant and is covered by a single lease
  4. The space is provided with an automatic sprinkler system and a manual fire alarm

Explanation

Occupancy classification is driven by the purpose for which a space is used, as described in the occupancy group definitions of Chapter 3. Physical partitions, lease arrangements, and fire protection features affect allowable area, height, and separation requirements but do not by themselves create an occupancy group. A space whose use matches a listed group is classified in that group.

Question 42Building Planning and Occupancy Classification

A building houses a wholesale showroom where durable goods are displayed for sale to retail dealers. Under the IBC, this use is most appropriately classified as which occupancy group?

  1. Group B Correct answer.
  2. Group S-1
  3. Group A-3
  4. Group M

Explanation

Group M covers mercantile uses involving the display and sale of merchandise to the public, while wholesale showrooms displaying goods for dealers are treated as business occupancies. The distinction turns on whether the display is open to the general public for retail purchase. Group B is the correct classification for wholesale display space.

Question 43Building Planning and Occupancy Classification

An ambulatory health care facility provides outpatient surgical treatment requiring general anesthesia to patients who are incapable of self-preservation. Which occupancy group applies?

  1. Group I-1
  2. Group B
  3. Group E
  4. Group I-2 Correct answer.

Explanation

Ambulatory care facilities where patients receive outpatient treatment requiring general anesthesia and are incapable of self-preservation fall within Group I-2 under the institutional provisions. Group I-1 covers custodial care for residents capable of responding to emergencies. Group B would apply only where occupants are not incapable of self-preservation.

Question 44Building Planning and Occupancy Classification

A one-story building contains a small chapel with fixed seating for 90 occupants, used only for religious ceremonies. Which classification is most appropriate?

  1. Group A-3 Correct answer.
  2. Group R-1
  3. Group B
  4. Group A-2

Explanation

Places of religious worship are expressly assigned to Group A-3 in the assembly occupancy provisions. Group A-2 is reserved for food and drink consumption, and Group B does not capture an assembly use of this size. The fixed seating for 90 occupants confirms an assembly occupancy rather than a small accessory use.

Question 45Building Planning and Occupancy Classification

A three-story building contains 40 dwelling units with no more than two units per floor connected to a common corridor, and the units are occupied on a transient basis. Which occupancy group applies?

  1. Group R-3
  2. Group R-4
  3. Group R-2
  4. Group R-1 Correct answer.

Explanation

Group R-1 covers residential occupancies with sleeping units for transient occupancy, including congregate living and transient dwelling units. Group R-2 applies to permanent residential occupancies such as apartments and dormitories. Because the units are transient, the correct group is R-1.

Question 46Building Planning and Occupancy Classification

In a mixed-occupancy building, what is the primary effect of providing an occupancy separation between two different occupancy groups?

  1. The building may be treated as separate buildings for allowable height and area purposes
  2. Each separated portion must independently comply with the most restrictive occupancy requirements
  3. The separated occupancies are evaluated independently for allowable height and area Correct answer.
  4. The fire alarm system may be omitted from the smaller occupancy

Explanation

Where occupancies are separated in accordance with the required separation table, each portion is treated independently when applying allowable height and area limits. Without adequate separation, the building must be evaluated as a single occupancy using the most restrictive provisions. Separation does not create separate buildings, nor does it permit omission of required fire protection systems.

Question 47Building Planning and Occupancy Classification

A building contains an accessory occupancy that occupies less than 10 percent of the building area and is not classified as a hazardous occupancy. What is the permitted treatment?

  1. It must be provided with a two-hour fire barrier regardless of area
  2. It must be classified as a separate principal occupancy with its own separation
  3. It may be classified as part of the principal occupancy without a required separation Correct answer.
  4. It must be classified as a Group H occupancy because it is accessory

Explanation

Accessory occupancies are subordinate uses that may be classified as part of the principal occupancy, subject to the area and hazard limitations in the code. When those limits are met, no fire separation is required between the accessory use and the principal occupancy. Exceeding the limits requires classification as a separate occupancy.

Question 48Building Planning and Occupancy Classification

A room in a business occupancy stores small quantities of flammable liquids in excess of the maximum allowable quantities for a control area. What is the required classification?

  1. Group S-1
  2. Group F-1
  3. Group B, provided sprinklers are installed
  4. Group H Correct answer.

Explanation

Storage or use of hazardous materials exceeding the maximum allowable quantities per control area requires classification in Group H. Sprinkler protection and other features do not change the occupancy group. Group S-1 and Group F-1 apply to ordinary storage and moderate-hazard factory uses without hazardous material exceeding the thresholds.

Question 49Building Planning and Occupancy Classification

Which of the following best describes the basis for determining whether a building is classified as a high-rise building under the IBC?

  1. The building has more than six stories above grade plane
  2. The building contains an occupied floor more than 55 feet above grade plane
  3. The building has an occupied floor more than 75 feet above the lowest level of fire department vehicle access Correct answer.
  4. The building exceeds the allowable height for its construction type

Explanation

The high-rise threshold is defined by the height of the occupied floor above the lowest level of fire department vehicle access, not simply by story count or grade plane. This measurement accounts for site conditions affecting firefighting access. Story count and allowable height limits serve different purposes in the code.

Question 50Building Planning and Occupancy Classification

A building is classified as Group A-1 and contains a stage with a proscenium wall. What is the significance of the proscenium wall for the stage classification?

  1. It removes the requirement for a stage ventilation system
  2. It allows the stage to be classified as Group B office space
  3. It eliminates the need to classify the stage as an assembly occupancy
  4. It determines whether the stage is treated as a separate occupancy requiring specific separation Correct answer.

Explanation

The presence of a proscenium wall affects how a stage is classified and separated from the audience area. Stages with proscenium walls are treated differently from open stages with respect to occupancy separation and protection features. The wall does not eliminate assembly classification or change the stage into an office use.