K1 and K2 for determining bearing length Y for base plate

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#32904 - 02/01/10 03:51 AM K1 and K2 for determining bearing length Y for base plate
Win Member Registered: 06/01/09 Posts: 6 Loc: Kuala Lumpur, Malaysia	Dear to whom it may concerned, Please refer to the attched PVElite calculation. The values of K1 , K2 and hence Y seem to be inccorect that lead to high thickness for the base plate. Please clarify. Winson Lim Attachments 999-pvelitecalsheet.pdf (1668 downloads) _________________________ Winsonlim73
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#32995 - 02/04/10 01:54 PM Re: K1 and K2 for determining bearing length Y for base plate [Re: Win]
Luis Sanjuan Member Registered: 08/19/08 Posts: 87 Loc: Houston,TX, USA	Hi Winson, The latest version of PV ELite 2010 uses another formula for the moment arm for the baseplate. Install PV Elite 2010 to see this calculation. Quote: Baseplate Thickness Calculation per D. Moss: Bearing Pressure (fc) = 2 * (QO + Tforce) / (Y * Bplen) = 2 * (25166.08 + 791.98 ) / (1332.06 * 2316.48 ) = 0.02 MPa Distance from Baseplate Edge to the Web [ADIST]: = (Bplen - Weblngth) / 2 = (2316.48 - 2265.68 ) / 2 = 25.4000 mm Overturning Moment due To Bolt Tension [Mt]: = Tforce * Adist = 791.98 * 25.40 = 20124.53 N-mm We have also corrected the values which were not shown correctly in metric units in the report. The corrections will be seen on the next PV Elite 2010 Build. I have attached a sample of the calculations for the Bolt Area calculation and the Baseplate Thickness Calculation per D. Moss for you to see. Attachments BoltAreaCalcperMoss.pdf (787 downloads) Description: PV Elite Calculation _________________________ Best Regards, Luis Sanjuan
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