If you're reviewing something, then yes you should perform your own calculations to do so. What's the alternative? Perhaps I don't understand the question.
If we're looking at this sketch:
The basic procedure is:
Calculate the thrust/tension force in the horizontal piece.
Design a connection between it and each rafter.
Design the rafter to resist the thrust force and the forces due to dead, snow, and any other applied loads.
Design the vertical...
Kristofer, is there a reason why you can't frame it like this:
IMO, all other options (including my sketch) are inferior to this kind of detail, where the ceiling joists are lapped over the rafters. In all three of your sketches above, you're creating unnecessary complications. I wouldn't...
If this is in reference to the sketch I made, the rafter and joist aren't aligned. They're lapped. The joist would be on one side of the rafter and the vertical on the other. Between the vertical and joist would be a spacer block. I didn't draw it exactly correct in terms of the dashed...
I'd be tempted to build the whole thing out of 2x4s, kind of like milkshakelake mentioned. Maybe just use wood screws or nails if the loads work. There would be 2 vertical pieces lapped over each side of the beam and a horizontal piece matching the beam width. The horizontal would support the...
If it's necessary to use the geometry shown by OP and the floor joists are extended to lap over the rafters at the overhang, I wouldn't provide a seat cut. I'd prefer to have a vertical 2x piece lapped over the rafter above the wall. The detail would be something like this. I'd generally...
At the end walls (which is what your detail shows) there would be no outward thrust because the wall studs are directly supporting the rafter.
I assume your question is concerning locations other than the end walls, though. In that case, I'd create a structural model or do some hand calcs. to...
I think there's a good chance they would just take the cheapest engineer, since to them this is only a "few calcs." and they're probably not considering the liability of 50 builds with 50 individual homeowners. This seems similar in a lot of ways to condominium projects, which is seen as a much...
I may be the outlier here, but $50k for the liability associated with 50 houses seems low. I'd really want my plans to be bulletproof considering the increased risk of each house being built 25 times.
With that said, I'm sure there's probably another engineer in my area who'd do each design...
I'm a little late to this party. This is certainly an interesting problem and one I've pondered before. My approach would be to:
model the beam with two supports, one at "B1" and the other at "B7" (per the diagram above)
load the beam fully (we'll call this load case A) as well as with only...
I would also not worry about a 1 mm displacement from your analytical model. With both the ceiling and roof diaphragms, I doubt this movement will occur. If it does, I still wouldn't be too concerned.
Wood construction moves through shrinkage and seasonally by more than the 1 mm you're...
I'll second this. Overall your checklist seems fine for gravity loads, but make sure you're not neglecting lateral. I've had a few of these projects where I determined that the wall to be removed was acting as a shear wall and a steel moment frame was needed to preserve the lateral strength.
I agree with the comments above. These plans are rather bad. If this is (or was) new construction, I'm not sure what the "PE" was thinking designating a beam as 6" wide by 15" deep. This would have to be an S section which isn't commonly used in new construction.
If this has already been...
With the steel here, that wasn't the approach I took to resist the outward thrust on my project, but it's a good idea. If the geometry works out similarly and you could rely on direct bearing between the hip and fascia boards, then you would just need a 90 degree bent/welded steel plate to...
No chance a screwed connection like you show will work. Definitely needs to be something more like what kootk drew above.
This is what I came up with for a recent project. Obviously this is a little different than yours because I had a steel frame below the wood framed roof, but I would...
I didn't run any calculations on the anchor bolts, but others here have, and some of them feel they're inadequate. I think that's the reason for this general sentiment. I wouldn't say the design obviously had no engineering oversight, although I think it's possible.
For me, the concern is...
This is impressive architecture. The steel fabrication and overall construction appears top notch. And I really like how it's not connected to the building in terms of a clean waterproofing detail.
With that said, even if it works on paper, I wouldn't be brave enough to design something like...
I do, but it takes maybe 15 minutes to create the agreement/contract. I then use Adobe Sign to have the document digitally signed. I recall my insurance provider inquiring about the amount of work I do without a signed contract, so I try to avoid that.
Well, I'm about 10 times slower than this!
I think the risk is being exaggerated in this thread (see XR250's experience). As long as expectations are properly communicated up front and in a written Agreement, I wouldn't be overly-concerned with being sued. In most cases, the cost of an engineer being wrong will still be less than the...