Laserfiche WebLink
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 />Module Pressure Calculation (ASCE 7-16): <br />• The following equations reflect ASCE-prescribed calculations, with values specific to InvisiMount <br />included where possible. <br />•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 />• The below equations are applicable only to modules with an area equal to or greater than 19.5 <br />ft^2. <br />•See below glossary for definitions of all referenced variables. <br />•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 = . + . <br />o = { .+ . + .. + . + . <br />• The process for solving for these equations is as follows: <br />o Identify site-specific inputs: <br />▪ = [] <br />▪=[/ / ] <br />▪=[]ℎ <br />▪=[] <br />▪ =[ ] <br />▪=[1 / 2 / 3 ] <br />o Select the following coefficients from the below Look-up Tables: <br />▪= [] <br />▪ =[] <br />▪ =[ ] <br />▪,− =[ ] <br />▪,+=[ ] <br />o Use the following equations to establish wind and snow loads: <br />▪ The minimum allowable value for & is 16 psf. <br />▪ Wind, Uplift: = . ( ) ∗ ∗,− <br />▪ Wind, Downforce: = . ∗( ) ∗ ∗,+ <br />▪ Snow: = , ∗ ( ) <br />If ≥15°, , =0.84∗ ∗ <br />If <15° <20 , , = <br />If <15° > 20 , , = { 200.84∗ ∗ <br />o Add the resulting load pressures in the load combination equations (dead load is <br />provided): <br />▪ = . + . <br />▪ = { . + . + .. + . + . <br />3428 S <br />Ct08/09/23