From my understanding via http://www.apache.org/legal/resolved.html that to ASF/Apache 2.0, BSD 3-Clause is a Cat-A license, thus I could include a BSD 3-Clause upstream project under my Apache 2.0 licensed project.
 For code file headers, on those that come from the BSD 3-Clause licensed project, I could add my copyright lines on top of the existing BSD 3-Clause with Apache 2.0.
Are  and  correct? If they are correct could you please help point me some examples on doing so? If incorrect, could you please help hint and guide me on how to do it properly?
what are you trying to do? Include as dependencies, link, copy-paste, distribute as binary, ...? The link you have referenced is only for "Apache Software Foundation projects"; is that what you are working on? Is there any addnl info you can give us so that we can accurately assess your situation and think about an answer? – by Martin_in_AUT
Sorry I didn't put it clearly, our product is open-source in apache 2.0 and now we will include this component (in BSD 3-clause) with our own folk, where our copyright with apache 2.0 will be appended, there will be also binary distributions.