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Asce 7 solar panels.
Wind loads on rooftop photovoltaic panel systems installed parallel to roof planes joseph h.
David banks phd p eng principal.
In asce 7 16 there are two sections that cover rooftop solar panels.
Drawing from published case studies and their own extensive experience with solar panels o rourke and isyumov present recommendations that are compatible with snow load procedures in minimum design loads and associated criteria for buildings and other structures including the asce 7 load factors thermal slope and exposure and asce 7 load.
Amendment also allows dsa to accept industry standards to ensure compliance of solar panel attachments after recent solar panel attachment failures.
Cain p e consultant solar energy industries association seia washington d c.
Printed with permission from asce.
At the time they advocated the use of the mwfrs methodology of asce 7 05 which uses the solar structure as the main wind force resisting system but can be too conservative for a ballasted system that is often not a contiguous structure.
Example of asce 7 16 figure 29 4 7 excerpt for rooftop solar panel design wind loads.
Section 29 4 3 addresses buildings of all heights with a flat roof or gable hip roofs with a slight slope less than 7 degrees.
Required 10 inch minimum distance from roof edge or ridge height above roof between 2 inches and 10 inches minimum gap of 0 25 inch between adjacent rows of panels in earlier version of ac 428 minimum gap was 0 75 inch.
Model building codes have used asce 7 05 as the basis for several years which largely follows the design principles of allowable stress design.
Recently asce 7 10 was published and has become the basis for the 2012 series of the international codes i codes.
For example asce 7 16 now clearly states that the weight of solar panels and their support are to be considered as dead loads roof live loads need not be applied to areas covered by solar panels under a certain spacing or height and seismic design is based on already established principles in section 13 3 for non structural component design.
Section 29 4 4 covers the other roof slopes.
Determining wind and snow loads for solar panels 2 u s.
1510 7 2 1 provides additional information regarding seismic and wind design requirements for roof top solar panels and references new sections added to asce 7.
See asce 7 16 for important details not included here.
