My WebLink
|
Help
|
About
|
Sign Out
Browse
Search
07-6831
Zephyrhills
>
Building Department
>
Permits
>
2007
>
07-6831
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
3/6/2009 4:34:13 PM
Creation date
1/9/2008 10:39:10 AM
Metadata
Fields
Template:
Building Department
Building Department - Doc Type
Permit
Permit #
07-6831
Building Department - Name
THOMAS,TOM
Address
4952 TIMBERWAY
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
21
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
<br />The following information contains the requirements for a roof-mounted system designed <br />- <br />for a wind velocity of 136 miles per hour. This is a higher design pressure than is required <br />in central Florida. This installation will meet F.RC. 2003 for central Florida. Supporting <br />data is provided and analyzed at the new design pressure of 61.5 psf for coastal regions. <br /> <br />The Sealed Air FS, FW, and FP series panel have been tested by, e Aero Engineering <br />Group of the Convair Division of General Dynamics Corpo . n' a low v ocity wind <br />tunnel to a design load of 55.5 Pst: which equals a wind velo. f 136 miles hour. <br /> <br />2 2fT <br />55.5 = 0.00256 V (35/30) <br />V= 136 mph <br /> <br /> <br />The framed series panels are attacbed directly to the roof structure (securely into rafters) <br />per installation instructions by factory retaining clips tested to retain the panel at a loading <br />of83.5 pst: or a wind velocity of 176.7 mph. Use the factory recommended clip <br />arrangement with Factory supplied 1/4 - 20 lag screws having a minimum tensile strength <br />of 45,000 psi, secured by 114" zinc plated thrust washers. <br /> <br />To calculate the uplift force of the section of panels, use the formula: <br />(P) x (A) x (N) <br />Where: <br />P = Pressure per square foot on the panel surface for the design velocity. <br />A = The width x length of the panel. <br />N = Nmnber of panels mounted on the roof. <br /> <br />Example: For the following example, the largest array of the largest collector is used to <br />demonstrate the maximum exposure. Arrays should be limited to 11 collectors or less per <br />bank for thermal performance reasons. All charts supplied have been calculated on the <br />new maximum test pressme of 61.5 pst:, and the anchorages are prorated to reflect the <br />higher values. The total uplift of an 11 panel section of 12' conectors at a wind velocity of <br />136 mph will be: <br /> <br />55.5 x4x 12 xII =29,304 lb. <br /> <br />Lag bolt pull out force is calculated by the thread strength of the lag, and the ability of <br />woodto hold the lag in place. As the length of the lag increases the wood's ability to hold <br />the lag increases until the tensile strength of the bolt is reached. Wood typically used in <br />~uilding roof structures is softwood having a specific gravity of 0.55. The lag bolt pull <br />out force must exceed the uplift force determined above in order to keep the solar array <br />(panel section) in place. The following pull out force is given for lag bolts in wood <br />substrate. Forces are per inch oflength imbedded in wood. <br /> <br />1/4" = 260 lb./inch <br />3/8" = 390 lb.rmch <br />
The URL can be used to link to this page
Your browser does not support the video tag.