What it appears is, that none of the methods used with standard construction is correct, the recommended method will be by each indivisual manufacture of the lam support,
we were working at a site one day when a company engineer was there explaining the proper way to support mechinical equipment including ceiling fan's
Here is a good site to look
http://www.boozerbeam.com/techsupport.htm It is a supprise to find out that the top of the Lam is where they want it supported not at the bottom, and also notice the critical areas.