Building Construction Chapter 11
41 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What makes it difficult to determine the extent of overhead fires in roofs?

  • Ventilation work on roofs
  • Roofs are designed to support lighter live loads
  • Loads added to roofs over time
  • Inherent concealed spaces between the ceiling and roof deck (correct)

    • Why are roofs not as strong as floors?

  • They support more dead loads
  • They support lighter live loads (correct)
  • They are designed to handle dynamic loads
  • They have inherent concealed spaces

    • What safety issue arises from loads being added to roofs for which they were not designed?

  • Difficulty in ventilating heat from the structure
  • Structural instability due to added loads (correct)
  • Compromised integrity of the roof deck
  • Increased risk of overhead fires

    • Why can it be difficult for firefighters to determine the extent of fire in a roof?

    <p>Multiple layers of roofing materials can conceal the extent of the fire.</p> Signup and view all the answers

    What is the slope range for low slope roofs?

    <p>0/12 to 3/12</p> Signup and view all the answers

    Which type of roof presents a major hazard to firefighters due to steepness and lack of secure footing?

    <p>Pitched roofs</p> Signup and view all the answers

    What determines the design of pitched roofs?

    <p>Climate, function, and aesthetic considerations</p> Signup and view all the answers

    What type of roof slopes in four directions and has a degree of slope like a gable roof?

    <p>Hip roof</p> Signup and view all the answers

    Which type of roof has a break in the slope of the roof on all four sides, creating a concealed space for fire travel?

    <p>Mansard roof</p> Signup and view all the answers

    What type of roof is used to provide light and ventilation, with a raised central section containing openable windows?

    <p>Sawtooth roof</p> Signup and view all the answers

    What is the purpose of a dormer in buildings with pitched roofs?

    <p>Increase available living space in the attic</p> Signup and view all the answers

    What type of roof uses inverted trusses and creates a concealed space between the ceiling and the roof deck?

    <p>Inverted roof</p> Signup and view all the answers

    Which type of roof can fail quickly in a fire, depending on fuel load?

    <p>Unprotected lightweight open-web joist roof</p> Signup and view all the answers

    What is omitted in a type I structure from roof supports when the roof is located more than 20 feet above the floor in an assembly occupancy?

    <p>Fireproofing</p> Signup and view all the answers

    What are the conventional framing components for roofs?

    <p>Rafters, ridge boards, collar ties, ceiling joists, rafter ties</p> Signup and view all the answers

    What is required if an architect wants to leave the underside of the roof exposed without joists?

    <p>A structural ridge beam</p> Signup and view all the answers

    Which type of truss is most commonly used for pitched roofs?

    <p>Fink and Patt trusses</p> Signup and view all the answers

    What material is frequently used for both the deck and the exterior roof covering in roof construction?

    <p>Corrugated steel decking</p> Signup and view all the answers

    What is the range of gauge for corrugated steel used for decking?

    <p>29 gauge to 12 gauge</p> Signup and view all the answers

    What is the usual thickness of wood panel decking on supports 24 inches from center?

    <p>1/2 inch</p> Signup and view all the answers

    Why are the same structural systems for the roof and the floors used in a multi-story building?

    <p>Because it reduces construction costs and simplifies the overall design.</p> Signup and view all the answers

    What is the primary concern with encountering layered roofs during firefighting operations?

    <p>Extra thickness impeding progress during ventilation and access operations</p> Signup and view all the answers

    What is the purpose of a vapor barrier in a flat roof assembly?

    <p>To reduce the diffusion of interior moisture into the insulation layer</p> Signup and view all the answers

    Which type of membrane uses several overlapping layers of roofing felt saturated with a bituminous material?

    <p>Built-up membrane</p> Signup and view all the answers

    What is the function of thermal insulation in a roof assembly?

    <p>To reduce heat loss through the roof</p> Signup and view all the answers

    In what way is a fluid-applied membrane different from other types of roofing membranes?

    <p>It is applied as a liquid and then allowed to cure</p> Signup and view all the answers

    Why are wood shingles prohibited in many jurisdictions?

    <p>The base material is not fire resistant</p> Signup and view all the answers

    What is the primary advantage of using small-sized shingles and tiles on a roof?

    <p>Allowing for movement between individual units caused by thermal expansion and shifting of building structural units</p> Signup and view all the answers

    What is the life expectancy of slate as a roofing material?

    <p>150 years</p> Signup and view all the answers

    Which material is frequently made to look like clay, slate, or wood for roofing purposes?

    <p>Concrete</p> Signup and view all the answers

    What operational problem can arise with clay, slate, and cement tiles during a fire?

    <p>Becoming more slippery and posing a fall hazard</p> Signup and view all the answers

    What test procedures are materials subject to in order to be a third party listed product?

    <p>Intermittent flame exposure, burning brand, flying brand, rain, weathering, spread of flame</p> Signup and view all the answers

    What are the three classifications based on the severity of fire a material can withstand?

    <p>Class A effective against severe fire exposure, Class B effective against moderate fire exposure, Class C effective against light fire exposure</p> Signup and view all the answers

    What are the reasons rain roofs may be installed for?

    <p>To cover deteriorated roofing elements, to change the profile of a building, to update architectural design/appearance, cost effective compared to replacing roof</p> Signup and view all the answers

    What is a potential hazard for firefighters when encountering rain roofs?

    <p>Difficulty in detecting, accessing, and extinguishing products of combustion in the void space</p> Signup and view all the answers

    What is a characteristic of a photovoltaic system?

    <p>Produces reliable, clean energy for various applications including building systems</p> Signup and view all the answers

    What parameters do codes and authorities add for solar panels on buildings?

    <p>Clear space along edges and ridge of roof, uniform labeling of structures with PV related materials</p> Signup and view all the answers

    What is a potential danger related to compromised solar systems on buildings?

    <p>Can transfer electrical charge to metal roofing materials</p> Signup and view all the answers

    What is the primary hazard of vegetative roofs if not properly hydrated or if fertilizer is not stored properly?

    <p>Increased fire load</p> Signup and view all the answers

    What is the range of dead load that a rooftop garden can constitute on the roof structural system?

    <p>20-150 lbs per square foot</p> Signup and view all the answers

    What are some benefits of green roofs?

    <p>Added insulation and improved air quality</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser