Has anyone used a (2) sided high load diaphragm? In this case, say Structural 1 sheathing with 10D nails, (3) lines of fasteners has a capacity of 1,950 plf.
Is it possible to use this on both sides of a wood shear wall?
dhengr:
The truss plan doesn't match what was done...I should have clarified that. The girder truss sits back 10ft from the edge of the wall. The truss manufacturer ran the hip tails wild over the shorter trusses and the contractor installed vertical 2x members from the tails down to the...
The main trusses are attached to the roof diaphragm. These shallower trusses are not attached to the roof diaphragm, they just have some sheathing on top with some 2x4's coming down from the overbuild.
My camera's memory card is corrupted and I'm unable to retrieve my photos from the site, so...
I would have said yes originally, however, the edge track for the acoustical ceiling tile is visibly pulled away from the wall that rotated outward. There are also areas where the acoustical tile has been scrunched at interior non-bearing wall areas/partition walls. It just seams like it has had...
I looked at the return walls and there is nothing. No new cracks, walls are plumb (in and out of plane). I just don't know, I'm baffled in a sense. The wall that moved exhibits the classic smiley face that we all see in text books showing diaphragm deflection. If the entire building racked...
I tend to agree that the bottom chord buckling may be very odd thing. The bottom chords of the trusses displacing outward is the only thing that really makes sense to me right now, or some form of rotation of the trusses to make the diaphragm shift out in the middle. In the section I drew in the...
Another possibility that popped into my mind was maybe the tension on the double top plate in the last diagram attached was too high for the load applied...i.e. they didn't provide enough nails in their double top late splice, or they didn't splice the double top plate appropriately and it's...
I ran a plumbob as well as a level on the trusses shown to be leaning, and all were leaning as shown in the section view the same direction the wall was leaning. It looked as if the roof was overloaded at one time and the single ratrun of a 2x6 at the bottom chord shifted all the trusses in this...
Here is my over-exaggerated diaphragm deflection image on the roof plan.
What else would cause the diaphragm to deflect at the top, which is what has caused the wall to rotate outwards, if it's not the trusses racking/rolling? The side walls are in great shape with no signs of distress. There...
Here is the truss plan. There isn't much detail from the existing drawings that shows the connections.
Upon inspection, each truss had (2)Simpson H2.5A's from truss to double top plate. I didn't find any that looked to be bent or stressed in any way, so I'm not necessarily too worried about the...
Racking or rolling may be a better term. There isn’t any rigid attachment at the ceiling such as gyp board. If I brace the trusses, they will be left in a stressed state. The walls perpendicular to the trusses that moved haven’t been noticeably affected.
I guess my question about the wall...
Have an investigative project. A 2-story wood structure that the owner called and said the second story wall shifted outward from the building. I spent about 2 hours looking at different structural aspects and then decided to look at the trusses a little further after not finding any thing...
@canwesteng:
As a person that used to swing a hammer, hang drywall, and do trim work...I can truly say that I see the benefit of being able to draw something by hand or in CAD. If you don't know how to draw it, then you surely aren't going to know how to build it. Site visits and discussions...
CAD - Is it really menial?
CAD is a very important part of engineering...in fact, I would say it is truly part of the art of engineering. If you can't draw it by hand or in CAD, then you may be out of touch with how things are actually constructed. My company operates on both the engineering...
Haven't worked at a really big firm, but have friends that have and do. I own a small firm. I like the smaller firms as well. The atmosphere is much more relaxed, you don't have to deal with the red tape of a big corporation, and your employers tend to be a little more understanding of...
Ron: Hadn't thought about re-nailing all the plates. I can see that now that you mention it. There most likely is some movement in the connectors...I didn't see any indication when I looked at the joints while I was in there, but I likely wouldn't have seen it because I wasn't thinking about it...
