ULA
PLANNING AND
ASSEMBLY
INSTALLATION MANUAL
SYSTEM CERTIFICATION
PAGE
17
APPENDIX A
The ULA system has been certified 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, specific modules are selected for their physical properties so that the certifications can be broadly applied. The following lists the
specific modules that were tested and the applicability of those certifications to other modules that might come onto the market.
In addition to UL 2703 certification, Unirac performs internal testing beyond the requirements of certification 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 profiles (some complex frame
profiles 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 Certification
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
