UNIRAC ULA - Appendix A: System Certification

ULA
PLANNING AND
ASSEMBLY
INSTALLATION MANUAL
SYSTEM CERTIFICATION
PAGE
17
APPENDIX A
The ULA system has been certied and listed to the UL 2703 standard (Rack Mounting Systems and Clamping Devices for Flat-Plate Photovoltaic Modules
and Panels). This standard included electrical grounding, electrical bonding and mechanical load testing.
In conducting these tests, specic modules are selected for their physical properties so that the certications can be broadly applied. The following lists the
specic modules that were tested and the applicability of those certications to other modules that might come onto the market.
In addition to UL 2703 certication, Unirac performs internal testing beyond the requirements of certication tests in order to establish system functional
limits, allowable loads, and factors of safety. These tests include functional system tests, and destructive load testing.
Note:
• Please refer U-Builder engineering report or stamped engineering package for information on mechanical load ratings, spans and cantilevers.
• Load ratings mentioned above are applicable for modules on table not on substructure.
Mechanical Load Test Modules
The modules selected for UL 2703 mechanical load testing were
selected to represent the broadest range possible for modules on
the market. The tests performed cover the following basic module
parameters:
• Frame thicknesses greater than or equal to 1.0 mm
• Basic single and double wall frame proles (some complex frame
proles could require further analysis to determine applicability)
• Clear and dark anodized aluminum frames
• PV modules may have a reduced load rating, independent
of the ULA load rating. Please consult the PV module
manufacturer’s installation guide for more information.
Tested Modules
Module
Manufacturer
Model/Series Area
[sqft]
UL2703 Certication
Load Ratings
Hyundai HiS-S325TI 21.06
Down– 113 PSF, Up – 50 PSF
Down-Slope – 15 PSF
SunPower SPR-P19-395-COM 22.20
Down– 113 PSF, Up – 50 PSF
Down-Slope – 15 PSF
First Solar FS-6xxx-P 27.12
Down– 33.9 PSF, Up – 33.9 PSF
Down-Slope – 16.5 PSF