interesting... I assume *not a shear wall* is so you limit the number of letters to the building department ;)
I suppose anything can happen. Did the walls have sheathing?
"Technically you don't need hold downs, but here it is a reqm't to at least provide LSTHD8's to prevent damage if a strong windstorm occurs during construction when all the dead load isn't in place yet. As far as the finished structure goes, a strong wind in the direction toward an opened door...
Archie,
It can. It's just extending the header past the jack stud which is unnecessary. It is detailed like that to try and justify a nailing pattern around an opening and throw in some straps and call it a stiff portal frame. Like others have said, that opening will always deflect more then...
.... or a perforated analysis of the left side, or ignore the entire wall all together if conditions allowed (which would be silly since so much good wall exists). This is a prime example of how software, lumber companies, and hardware companies are making an impact, and not in a good way.
http://files.engineering.com/getfile.aspx?folder=a7eee57b-44ab-49b9-ab62-80df9492f031&file=WALL_1.jpg
Wall with half the lumber (likely less), 25% hardware, stronger in both the normal direction to wind as well as shearwall *calculated* capacity.
The attachment is what would be expected by a...
If you raise the header and frame a pony wall underneath... you have a weak point in your wall under the header. Then what? Put another header in?
There is a reason why a header is above the opening, framed with (2) jack studs (required for your loading conditions assuming SPF #2 or something...
"I think what is confusing everyone is my 4 trimmers under the portal frames, this should probably be reduced to (3) or even (2) trimmers to make it more in line with actual capacities. I would probably reduce to (3) since I like to be conservative."
No Medeek... that is not what is confusing...
I can guarantee you that the portal frame in residential construction came out because it was first introduced by hardware companies.
Money is what drives this industry.
Why would I want to help you AELLC? I'm confused how my comments and your new business leads me to want to help you.
I...
"I already stated there is no rational method. Such is residential engineering, are you going to single-handedly change it?"
since the dawn of documented house building has at least 1 jack, 1 king been present. It is the norm.
The detail of 4 jack studs at minimum... should be one (1), at...
I did read it... and I am asking you to prove that those straps take the bending, shear, deflection requirements. And I also said that the wind pressures are forward pressures, and negative pressures.
The detail is wrong, it doesn't calculate, and the portal frame method was devised by...
^^It's two (2) 9' openings in second detail. That is, at a minimum... 9' plus the 2' plus the trib. at the end. At least 12'+ trib in ordinary analysis of king stud.
please do the calc on 12' trib king stud at 90 mph.. 100mph, etc.
It's not just that... but how does the load really get to...
The second detail has an approximate 70% overstress in the king stud (deflection not considered).
It also has way too many nails, hardware, and wood to make it desirable to build.
Post the information here including the calcs and let us decide. I have absolutely nothing better to do tomorrow so it will be like working at my old job :)
Really though... is it life threatening or an obvious immediate threat to someone? If not... just call the engineer on the phone. You...
If the plans are generic house plans being sold to anyone in the US under the IRC 2012 code you *definitely* do not spec out the driveway. And you should have a disclaimer that the foundation has been designed according to an allowable soil bearing pressure of 2000 psf without consideration...
