PA - Ching IBC - 5 BUILDING HEIGHTS AND AREAS
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Questions and Answers

What is the primary consideration for building designers when determining allowable heights and areas for a given occupancy?

  • Choosing the most costly and complicated type of construction
  • Meeting the criteria set forth in the code
  • Maximizing the economically viable building size (correct)
  • Speculative building for economic gain
  • In what chapter of the IBC are the criteria for allowable building heights and areas set forth?

  • Chapter 3
  • Chapter 1
  • Chapter 5 (correct)
  • Chapter 7
  • What is the goal in speculative buildings such as office buildings or retail uses?

  • Minimizing the allowable height and area
  • Maximizing the allowable height and area using the most economical construction type (correct)
  • Not considering construction type in building design
  • Choosing the most complicated type of construction
  • What task does the code analysis become after a building’s occupancy classification is determined?

    <p>Determining allowable heights and areas for the occupancy classification</p> Signup and view all the answers

    What types of design choices impact the use of Chapter 5 for determining allowable heights and areas?

    <p>Both known uses design choices and speculative building design choices</p> Signup and view all the answers

    What must the designer do when addressing the question of maximizing the economically viable building size?

    <p>Use an iterative process to maximize the space for a given building</p> Signup and view all the answers

    What is the allowable building height in feet above the grade plane for Type V construction with sprinklers and occupancy classification S13D?

    <p>40' (12.2 m)</p> Signup and view all the answers

    What is the allowable building height in feet above the grade plane for Type III construction without sprinklers and occupancy classification NS1,2?

    <p>50' (15.2 m)</p> Signup and view all the answers

    What is the allowable building height in feet above the grade plane for Type IIA construction with sprinklers and occupancy classification A?

    <p>85' (25.9 m)</p> Signup and view all the answers

    What is the allowable building height in feet above the grade plane for Type IV construction with sprinklers and occupancy classification S13R?

    <p>60' (18.3 m)</p> Signup and view all the answers

    What was the primary consideration for maximizing the economic efficiency of a building using the iterative process mentioned in the text?

    <p>Achieving the maximum area with minimum investment in construction materials</p> Signup and view all the answers

    What was the purpose of reorganizing the descriptions for allowable heights and areas in Chapter 5 of the building code?

    <p>To clarify and make more consistent how allowable heights and area are interpreted</p> Signup and view all the answers

    What is the purpose of the definitions applicable to Chapter 5 in the building code?

    <p>To facilitate uniform application of regulations</p> Signup and view all the answers

    What is the conservative way to calculate building area according to the text?

    <p>From outside face of wall to outside face of wall</p> Signup and view all the answers

    What is included in building area at full value according to the text?

    <p>Areas within the horizontal projection of a floor or roof above</p> Signup and view all the answers

    How should building height be measured according to the text?

    <p>To the average height of the highest roof</p> Signup and view all the answers

    What does 'story' intend to mean as per the building code?

    <p>Occupiable or usable space contained by a floor below and a plane above</p> Signup and view all the answers

    'Basement' is defined as what according to the building code?

    <p>A story, but one that is 'not a story above grade plane'</p> Signup and view all the answers

    According to the text, what does 'building area' usually exclude?

    <p>Thickness of exterior walls</p> Signup and view all the answers

    What is considered when determining if a level is 'a story above grade plane' according to Chapter 2 of the IBC?

    <p>The finished surface of the floor above the lower level relative to the grade plane</p> Signup and view all the answers

    What should never be challenged by Authorities Having Jurisdiction according to the text?

    <p>The upper limit of allowable area calculated conservatively</p> Signup and view all the answers

    What is the purpose of Table 504.3 in the context of building regulations?

    <p>To show allowable building heights in feet only</p> Signup and view all the answers

    What is the distinction between categories A and B of construction types according to the text?

    <p>Category A has higher fire resistance than Category B</p> Signup and view all the answers

    Why are heights expressed in two ways, based on the text?

    <p>To allow for flexibility in building design</p> Signup and view all the answers

    What is the relationship between occupancy and allowable building heights according to the text?

    <p>Occupancy determines the allowable building heights</p> Signup and view all the answers

    What does category A denote in the context of construction types?

    <p>Construction provided with increased fire resistance</p> Signup and view all the answers

    What do the tables in Chapter 5 address according to the text?

    <p>Heights and areas based on occupancies and construction types</p> Signup and view all the answers

    What is the purpose of the mass timber wood construction types included in the IBC according to the text?

    <p>To highlight the differences between different construction types</p> Signup and view all the answers

    How are allowable values for height in feet or height in stories determined according to the text?

    <p>By finding the intersection of occupancy, construction type, and sprinkler conditions</p> Signup and view all the answers

    "A" denotes construction that is "protected" with ____________.

    <p>&quot;increased fire resistance&quot;</p> Signup and view all the answers

    What do Tables 504.3 and 504.4 include according to the text?

    <p>Criteria necessary to find allowable values for building areas and heights</p> Signup and view all the answers

    What do Tables 504.3 and 504.4 show, based on the text?

    <p>Allowable building heights based on type of construction and sprinkler conditions</p> Signup and view all the answers

    How are occupants typically chosen when using Tables 504.3 and 504.4 according to the text?

    <p>By selecting from a list of possible occupancies that fit the building design</p> Signup and view all the answers

    What is the definition of building height according to the text?

    <p>The vertical distance from the grade plane to the top of the highest roof surface, excluding parapets but including pitched rafters</p> Signup and view all the answers

    How is story height for the topmost floor measured according to the text?

    <p>To the top of sloping roof rafters or to the top of ceiling joists</p> Signup and view all the answers

    How is basement defined according to the text?

    <p>A floor more than 6' above grade plane and more than 12' above finished ground level at any point</p> Signup and view all the answers

    What does § 503.1.1 exempt from building height and area limitations?

    <p>Low-hazard, high-bay spaces, such as mills or foundries</p> Signup and view all the answers

    What is required for Type I buildings with unlimited height and area according to § 503.1.3?

    <p>They do not require mitigations for unlimited-area building imposed on other construction types</p> Signup and view all the answers

    What is included in § 503.1.4 regarding 'occupied roofs'?

    <p>Recognition of increased use of building roofs for open space in urban areas</p> Signup and view all the answers

    What does § 503.1 allow with regards to 'fire walls'?

    <p>&quot;Fire walls&quot; can divide a single structure into a number of &quot;separate&quot; buildings</p> Signup and view all the answers

    Under what conditions are multiple buildings on a single site considered as separate buildings according to § 503.1.2?

    <p>&quot;Multiple buildings on a single site may be considered as separate buildings&quot; if they meet aggregate area limitations based on the most restrictive occupancy</p> Signup and view all the answers

    What does § 503.1.2 state about egress when multiple buildings are treated as one?

    <p>&quot;Means of egress must also be carefully examined when multiple buildings are treated as one&quot;</p> Signup and view all the answers

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