Supporting the loft

[ColchesterCabin]

My build is a modified litle house build with a similar twist like Lemay's with the loft. My questions are.....

Where he has one of the lofts supported by a full wal between the rafters and the floor joists is that enough support on a 16' span? if not then does one need a jack stud underneath to assist in the weight distribution? and if so to maintain the supprt can one use 1/4 - 1/2"  threaded rod through the wall tightened in order to keep the open concept?

Sorry for the mass questions but I am getting ready for the next part this and next weekends. Here is a plan picture for reference has changed a little re doorways and windows but you'll see the post in question near the stairwell...



Looking for some insight!

[MountainDon]

This is a duplicate of the following topic...

http://countryplans.com/smf/index.php?topic=12315.msg159617#msg159617

...therefore this one is locked. Please refrain from making duplicate topics. Thank you all.