I agree with your approach.
I think canwest assumption is only valid if your web so stiff enough so that you engage the whole cross section by dragging the load from the bot flange to the top. I don't think the web is in most cases and I just rely on the bottom flange to do the work like you...
Keep in mind that TC bolts are required to be mechanically galvanized, which is generally less durable than hot dipped galvanized a325 bolts. Depending on the use and exposure, I will typically specify HDG pretensioned A325 instead of galv TC bolts
It’s a good detail. I wouldn’t be shocked if it was necessary too... a 6” wall is pretty thin for 8.5 ft of retained soil. Bars may be working hard. I’m used to seeing 10” residential basement foundation walls.
In the final condition you may have no trucks near the foundation. But what about...
I’m looking for a reference or book that would contain information about construction details and typical construction information for old (late 1800s/early 1900s) mill buildings. Looking for the typical heavy timber and brick bearing wall structures. Trying to learn more about how they did...
Agree with the expansive grout. Good idea.
I recommend having them drill in some tap cons at an angle around the sides of the cored opening. Use say 3” screws and embed 1.5”. This way they will sort of act like dowels to give you some mechanical fastening.
Agree with dik. Check your anchor rod arrangement for a 300 ft lb moment. Squeeze another anchor rod somewhere in there if you are worried about strictly meeting the min. 4 anchor rods.
I don’t see any issue with this in the permanent Condition this is only an temporary erection issue. I...
The torsion you put into the girder is self limiting. In other words the girder cant twist more than the ends of the supported beam will rotate. Because the twist in the girder is limited by the supported beam you can ignore torsion in the girder.
As long as your connection (even if very long)...
@JAE can you point me to the document for those excerpts you posted? It seems like it could come in handy.
@OP my experience is that web members intersect top chord at around 2’ oc. It is usually around twice that (4’ oc) at bottom chord. This is because Sji allows you to neglect top chord...
I have not seen a guide for this as I think it is uncommon. Is the lifting contractor proposing this? I have a lot of questions about the actual feasibility of this given the sharp edge and 90 degree corner shown. When i design skids that need to be lifted I design a lifting lug that cantilevers...
I was recently checking a 8" reinforced masonry wall for out of plane loading. It is partially grouted with 1-#5 in every other cell. For this wall, the applied moment exceeds the allowable moment based on unreinforced masonry allowable stresses. So, I designed it as a reinforced masonry...
at early ages concrete modulus is not proportional to strength gain. Modulus gain lags strength gain. So, beware of higher deflections if you remove forms early. May be higher strength concrete helps, but i'm not sure. There is a paper from years ago that talks about this, but i can't find...
I have always assumed each end of the beam is a brace point. The ends of the beam can't move lateraly because if they did the load wouldn't be under the hook. The load has to be under the hook.
See ASME b30.1 design of below the hook lifting devices for lifting beam design although the ricker...
I don't like the idea of using tapped holes in this situation but if you wanted to try and justify it, read on....
There are some papers that discuss methods for calculating stripping strength of threaded joints. I don't have them handy at the moment but Industrial fasteners institute has a...
There is a paper that discusses this. It's a 1989 paper titled "Glitches in Flitch Beam Design" and it's also discussed in the 1956 "Timber Design and construction handbook"
The answer varies depending on the type of flitch beam you have. Edge distance is also matters because you want to...
Another reason not to do it: If the bolt pretension is measured by torque based methods, the loctite will lubricate the threads. The amount of loctite applied to the bolts and the 'calibrated' bolt assembly will inevitably vary, so your ability to achieve consistent pretension will be tough...
Tmoose is correct. This problem is statically indeterminate by 2 degrees. It is obvious that you can 'cut' two of those cables and still have a load path (which will be acompanied by excessive rotation). Therefore, your internal forces depend on relative stiffness and initial tightness of all...
If you use a gap element you need to run a nonlinear analysis. Are you?
I have used the friction pendulum (I think that's the name of it. I forgot the name of the exact link type) to model sliding resistance of a building mat. It worked well. Key is telling sap to run that load case with the...
