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// CODE SNIPPET

2405.5.2 Unit Skylights Rated for Separate Performance Grades for Positive and Negative Design Pressure

Building Code 2012 of South Holland > 24 Glass and Glazing > 2405 Sloped Glazing and Skylights > 2405.5 Unit Skylights > 2405.5.2 Unit Skylights Rated for Separate Performance Grades for Positive and Negative Design Pressure
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The design of unit skylights rated for performance grade for both positive and negative design pressures shall be based on the following equations:
Fgi ≤ PGPos (Equation 24-14)
Fgo ≤ PGNeg (Equation 24-15)
where:
PGPos = Performance grade rating of the skylight under positive design pressure;
PGNeg = Performance grade rating of the skylight under negative design pressure; and
Fgi and Fgo are determined in accordance with the following:
For Wo ≥D,
where:
Wo = Outward wind force, psf (kN/m2) as calculated in Section 1609.
D = The dead weight of the glazing, psf (kN/m2) as determined in Section 2404.2 for glass, or by the weight of the plastic, psf (kN/m2) for plastic glazing.
Fgi = Maximum load on the skylight determined from Equations 24-3 and 24-4 in Section 2404.2.
Fgo = Maximum load on the skylight determined from Equation 24-2.
For Wo < D,
where:
Wo = Is the outward wind force, psf (kN/m2) as calculated in Section 1609.
D = The dead weight of the glazing, psf (kN/m2) as determined in Section 2404.2 for glass, or by the weight of the plastic for plastic glazing.
Fgi = Maximum load on the skylight determined from Equations 24-2 through 24-4 in Section 2404.2.
Fgo = 0.

Related Code Sections


2405.5.2 Glass and Glazing, Unit Skylights Rated for Separate Performance Grades for Positive and Negative Design Pressure
The design of unit skylights rated for performance grade for both positive and negative design pressures shall be based on the following equations ...
Building Code 2012 of South Holland > 24 Glass and Glazing > 2405 Sloped Glazing and Skylights > 2405.5 Unit Skylights > 2405.5.2 Unit Skylights Rated for Separate Performance Grades for Positive and Negative Design Pressure
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/I.S.2/A440. Where the product manufacturer has chosen to have the performance grade of the skylight rated separately for positive and negative design ...
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Equations 24-2 through 24-4 in Section 2404.2. PG = Performance grade rating of the skylight ...
Building Code 2018 of South Holland > 24 Glass and Glazing > 2405 Sloped Glazing and Skylights > 2405.5 Unit Skylights and Tubular Daylighting Devices > 2405.5.1 Skylights Rated for the Same Performance Grade for Both Positive and Negative Design Pressure
R308.6.9 Building Planning, Testing and Labeling
of the tested unit. Such calculated design pressures shall be validated by an additional test of the glass-glazed unit skylight having the highest allowable ...
Residential Code 2018 of South Holland > 3 Building Planning > R308 Glazing > R308.6 Skylights and Sloped Glazing > R308.6.9 Testing and Labeling
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Structural wind load design pressures for glass-glazed unit skylights ...
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