The following engineering references were considered in determining the values of the wing load
conditions and material properties of the aluminum railing.
1) 0.6D + 0.6W
2) D + 0.75L + 4W + 0.75S (L=0)
• Maximum Building Height Considered = 30ft
• Exposure Categories Considered: B & C
• Wind Pressure Based on Section 30.4 (C&C Method 1)
• Gust Factor, G = 0.85
• Topography Factor, Kzt = 1.0
• Directionality Factor, Kd = 0.85
• Importance Factor, I = 1.0
• Zone 2 Pressures Only Considered
• Minimum 2 Rails Per Panel
• Maximum Cantilever of Railing from Anchor 12 Inches
• Tilt Angles Considered: 0 to 30 degrees
• Performance Not Limited to Deflection
• Adequacy of Attachments Based on Evaluation Report
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This photovoltaic system is to be installed in accordance with the National Electrical Code,
ANSI/NFPA70
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Design Code Refrences
•
IBC 2015 / CALIFORNIA BUILDING CODE 2016
ASCE 7-10 (wind loading)
ALUMINUM DESIGN: ALUMINUM DESIGN MANUAL 2010
•
•
Design Load Rating in Acoordance with UL 2703 STD
•
Downward Pressure - 10 psf
Upward Pressure - 05 psf
Down-Slope Load - 05 psf
•
•
Worst case loading conditions were based on the following two load combinations per section
2.4 of ASCE 7-10:
Worst Case Loading
The following parameters were considered in determining thevalues of the allowable span charts
of the railing.
Design Criteria
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