The Nrca Roofing Manual: Metal Panel Roof Systems

10 Questions | Total Attempts: 54

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The Nrca Roofing Manual: Metal Panel Roof Systems

Questions and Answers
  • 1. 
    The term "thermal movement" refers to a material's dimensional changes resulting from changes in temperature. A material experiencing a rise or decrease of temperature expands or contract, respectively. Thermal movement of materials in metal panel roof assemblies produces stresses for which of the following reasons:
    • A. 

      Different materials have different coefficients of linear expansion.

    • B. 

      Some components may be exposed to a greater degree of temperature change than others; for example, exterior panels will have a greater temperature-range exposure than the interior structure to which attachment is made.

    • C. 

      Movement of two components occurs in different directions; for example, panel lengths must accommodate vertical, or ridge-to-eave, movement, and ridge flashing must accommodate horizontal movement.

    • D. 

      All of the listed choices could be reasons.

  • 2. 
    Metal panels must resist sliding forces, typically called "_________ loads". These loads are caused by gravity and snowloads that force metal panels to move downslope. Typical metal roof systems need to be "___________" to resist drag loads but must allow for movement because of panel expansion and contraction.
    • A. 

      Transient - attached

    • B. 

      Gravity - soldered

    • C. 

      Drag - fixed

    • D. 

      Construction - welded

  • 3. 
    Review the photo. The dotted line represents the fixed point location. Select the correct answer:
    • A. 

      The metal panels are "Attached" at the Ridge and Hip - Sideslope movement is expected to occur

    • B. 

      The metal panels are "Fixed" at the Ridge and Hip - Upslope movement is expected to occur

    • C. 

      The metal panels are "Fixed" at the Eave and Valley - Upslope movement is expected to occur

    • D. 

      The metal panels are "Fixed" at the Ridge and Hip - Downslope movement is expected to occur

  • 4. 
    Architectural metal panel roof systems require continuous or closely spaced substrates. Architectural metal panel roof systems are typically water-tight. They are designed to shed water rapidly over the surface of the panels.
    • A. 

      True

    • B. 

      False

  • 5. 
    Review the image and select the correct answer.
    • A. 

      A = The component that is fixed to the metal panel. B = The opening / slot allows the metal panel to move at a different rate than the substrate. C = The component adhered to the substrate.

    • B. 

      A = The component that is fixed to the substrate. B = The opening / slot allows the metal panel to move at a different rate than the substrate. C = The component fixed to the metal panel.

    • C. 

      A = The component that is fixed to the metal panel. B = The opening / slot allows the metal panel to move at a different rate than the substrate. C = The component fixed to the substrate.

    • D. 

      A = The component that is fixed to the substrate. B = The opening / slot allows the metal panel to move. C = The component fixed to the substrate.

  • 6. 
    When a metal panel is fixed at a ridge, fasteners can be concealed under ridge or hip caps. Concealed fasteners at the ridge can be more aesthetically acceptable to building owners in lieu of having exposed fasteners at the eaves.
    • A. 

      True

    • B. 

      False

  • 7. 
    Review the image and select the correct option.  
    • A. 

      The blanket insulation is fully adhered to the purlin. The clips are fixed to the metal roof panel and the purlin.

    • B. 

      The blanket insulation is fully adhered to the purlin. The clips are fixed to the thermal spacer block.

    • C. 

      The blanket insulation is loose layed on the purlin. The clips only fixed to the metal roof panel.

    • D. 

      The blanket insulation is loose layed on the purlin. The clips are fixed to the metal roof panel and the purlin.

  • 8. 
    When you consider what fastener to use when installing a metal panel, it is best to refer to the NRCA Figure 6-2: Guidlines for the selection of fastener based on galvanic action.
    • A. 

      True

    • B. 

      False

  • 9. 
    Because of the smooth surface of metal roof panels, in areas where snow and ice occur frequently, snow guards are recommended because metal panels transfer heat, snow and ice which may tend to loosen suddenly from panels.
    • A. 

      True

    • B. 

      False

  • 10. 
    The difference between a structural metal roof panel and an architectural metal roof panel - is the structural metal roof panels have the strength and capability of spanning structural members, such as joists or purlins, without being supported be a continuous or closely spaced roof deck - and an architectural panel cannot.
    • A. 

      True

    • B. 

      False

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