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SUNPOWER CORPORATION Document #524734 Rev G <br />SPAN TABLES, INVISIMOUNT Template FILE-074910, Ed. 2 <br />Document #524734 Rev G, Vol. 2 3 SunPower Proprietary <br />MModule Pressure Calculation (ASCE 7-16): <br />x The following equations reflect ASCE-prescribed calculations, with values specific to InvisiMount <br />included where possible. <br />x Note that some conservative assumptions have been made and, in some cases, the resulting <br />values may be more conservative than a site-specific iteration of the ASCE-based calculations. <br />x The below equations are applicable only to modules with an area equal to or greater than 19.5 <br />ft^2. <br />x See below glossary for definitions of all referenced variables. <br />x ASCE 7 §2.3 defines load combination equations for LRFD, which generate design load pressures. <br />The controlling equations which define the design load on the module are: <br />o ࡼ࢛࢖ = ૙.ૢࡰ + ૚.૙ࢃ࢛࢖ <br />o ࡼࢊ࢕࢝࢔ =ࡹࢇ࢞ ൜૚.૛ࡰ +૚.૟ࡿ +૙.૞ ࢃࢊ࢕࢝࢔ <br />૚.૛ࡰ +૚.૙ࢃࢊ࢕࢝࢔ +૙.૞ࡿ <br />x The process for solving for these equations is as follows: <br />o Identify site-specific inputs: <br />ƒ ࢠ =[ ] ݂ݐ <br />ƒ ࡱ =[ ܤ / ܥ / ܦ ] <br />ƒ ࢂ =[ ] ݉݌ℎ <br />ƒ ࢖ࢍ =[ ] ݌ݏ݂ <br />ƒ ࣂ =[ ] ݀݁݃ݎ݁݁ݏ <br />ƒ ࢆ࢕࢔ࢋ =[ 1 / 2 / 3 ] <br />o Select the following coefficients from the below Look-up Tables: <br />ƒ ࢠࢍ =[ ] ݂ݐ <br />ƒ ࡯ࢋ =[ ] <br />ƒ ࢻ =[ ] <br />ƒ ࡳ࡯࢖,ି =[ ] <br />ƒ ࡳ࡯࢖,ା =[ ] <br />o Use the following equations to establish wind and snow loads: <br />ƒ The minimum allowable value for ܹ௨௣ & ܹௗ௢௪௡ is 16 psf. <br />ƒ Wind, Uplift: ࢃ࢛࢖ =૙.૙૙૜૚૟૞ ൬ ࢠ <br />ࢠࢍ <br />൰ <br />૛ <br />ࢻ ∗ࢂ૛ ∗ࡳ࡯࢖,ି <br />ƒ Wind, Downforce: ࢃࢊ࢕࢝࢔ =૙. ૙૙૛ ૜૟૛ ∗ ൬ ࢠ <br />ࢠࢍ <br />൰ <br />૛ <br />ࢻ ∗ࢂ ૛ ∗ࡳ࡯࢖, ା <br />ƒ Snow: ࡿ =࢖࢙,ࢍ࢘ ∗܋ܗܛ(ࣂ) <br />If ≥15°, ݌௦,௚௥ =0.84∗ܥ௘ ∗݌௚ <br />If <15° ܣܰܦ ݌௚ <20 ݌ݏ݂, ݌௦,௚௥ =݌௚ <br />If <15° ܣܰܦ ݌௚ >20 ݌ݏ݂, ݌௦,௚௥ =ܯܽݔ ൜ 20 ݌ݏ݂ <br />0.84∗ܥ௘ ∗݌௚ <br /> <br />o Add the resulting load pressures in the load combination equations (dead load is <br />provided): <br />ƒ ࡼ࢛࢖ =૛ .૞ ࢖࢙ࢌ +૚.૙ࢃ࢛࢖ <br />ƒ ࡼࢊ࢕࢝࢔ =ࡹࢇ࢞ ൜ ૜.૞ ࢖࢙ࢌ +૚.૟ࡿ +૙.૞ࢃࢊ࢕࢝࢔ <br />૜.૞ ࢖࢙ࢌ +૚.૙ࢃࢊ࢕࢝࢔ +૙.૞ࡿ <br />939 W <br />Ln07/19/23