General Indications for Installation

1. Roof Pitch: SunSky performs best when installed at pitch rates of 10 percent (1in. to 10 in. slope or 5.7° ) or more. When installed at a lower pitch, additional sealing should be applied to insure weather resistance. We recommend SunSky installation about 5% pitch rate.
   
   
   
2. Load Rating: The load rating of installed SunSky panels will vary according to the panels' arrangement and span between supporting purlins. Under uniform load, SunSky had no mechanical failures or cracks at the end of any test to measure ultimate load when tested to "ICBO Evaluation Service Acceptance Criteria, AC 16 Plastic Skylights."

Notes: The diagrams are provided only as guidelines. Information was obtained from tests using SunSky 9" polycarbonate panels as roofing and siding. To avoid premature failure, all proposed spans should be tested in actual tests. In addition, a licensed engineer or architect must verify the application.

 

3. Uplift Testing: SunSky corrugated polycarbonate panels meet Uplift Test Criteria specified in UL 580 Test for Uplift Resistance of Roof Assemblies (UL Class 90).
   

Test Description

• Roof Covering: Corrugated polycarbonate roof panels with 9 inch spaced corrugations. The tested material comes in 0.032" thick x 38" width and 12 feet long.
  
  
• Fastener: 1/4 - 14 x 1-1/2" Type 2 Structural Drilling Fastener, carbon steel, zinc plate with 1" O.D. heavy EPDM/galvanized washer.
  
  
• Uplift Test Results: A buckled hip was visible during the test. The fasteners were in place and no cracks or breaks were found in the SunSky panels. The test assembly withstood all phase of test for Class 90. The roof assembly described in this report met the uplift test criteria specified in UL 580-Test for Uplift Resistance of Roof Assemblies. Note: The buckled hip returned to the original shape after testing with no panel damage or permanent deformation.

4. Purlin & Girt Spacing: Purlin and girt spacing are usually dictated by overall design and engineering calculations along which the whole structure is constructed. SunSky panels are installed at the same purlin/girt spacing as the rest of the metal panels in the structure.
   
   Verify that the installed SunSky panels will remain within the uniform load-supporting limits of deflections as observed by the Evaluation Acceptance tests ( see the above "Uniform Load" diagrams and "Uplift" paragraphs.
   
   In case purlin/girt spacing of the metal cladded structure surpass the values dipicted in the tables by a significant margin (especially in multi-panel runs), a secondary support system, based on data in the above mentioned tables, should be prepared for the SunSky skylight or sidelight. When designed spacing is marginally larger, on site environmental conditions should be considered and acted upon.