Thanks Tom I will look into that forum. Regards Roberto -----Original Message----- From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Tom Hausherr Sent: Wednesday, June 11, 2014 8:29 PM To: [log in to unmask] Subject: Re: [DC] IPC Sectional standards Roberto, Download the through-hole "Proportional Pad Stack" chart that includes data on the entire pad stack in mil and metric units. http://www.pcblibraries.com/forum/proportional-throughhole-padstacks_topic90 .html I've used this successfully for the past 25 years and based my entire PCB library on it. And of course it's in Mentor's LP Wizard (LP Creator) and PCB Library Expert, which comes free with the purchase of the IPC-7351B standard. Proportional Pad Stacks meet or beats all IPC standards for through-hole library technology. Tom -----Original Message----- From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Roberto Torres Sent: Wednesday, June 11, 2014 7:48 PM To: [log in to unmask] Subject: [DC] IPC Sectional standards A question. In the IPC 2221. 9.1.3 Thermal Relief in Conductor Planes. The last two sentences in this section: The relationship between the hole size, land and web area is critical. See the sectional standards for more detailed information. What exactly are the sectional standards does anyone know? Regards Roberto ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ---------------------------------------------------------------------------- ----- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------- ----- ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ---------------------------------------------------------------------------- ----- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------- ----- ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------------