I could not find any code reference to the minimum fillet size when designing coped beams. Which version on the pic below do you guys like more? Those are normally laser or plasma cut from 2 directions, so they rarely match perfect and typically leave some stress concentrators anyway
And sort...
Most discussions I've seen regarding welding in k-area were about stiffener plates. Any issues with starting a shear tab weld right from the point of tangency between the fillet and a web?
Also, part 9 recommends 1/2" clearance and I am a little short under the bottom side of the top girder...
I see mechanical equipment being installed on top of raised concrete pads all the time. What is the reason those pads are raised? Why not make them same level as the rest of the slab? The one on the 2nd picture appears to be isolated from the floor slab, while the 1st one seems to be not...
When adding a thicker, reinforced footing in a middle of the existing PEMB slab, any pros and cons of tying new footing to the old slab with rebar dowels? There is a granular fill under existing slab, and it always makes me nervous, as excavation results in gaps under the old slab around the...
Any issues with using gravel on top of sand while backfilling utility trenches containing PVC pipes? Would a geotex between sand/gravel be useful or is it overkill?
What is typically done to prevent corrosion on the inside of HSS columns? Structure is not exposed to elements, and top ends are uncapped. Client is concerned they will rust from inside out.
Erector wants to use leveling nuts instead of shims under the column base plate before filling 1" space with non shrink grout. If that is the case, I assume compression load will be transferred to the anchors instead of a grout and that's not how I designed it.
1. Is that a problem? What is...
Any coefficients to use when calculating a load on the hanger rods from the structure suspended at 4 points? Client wants to suspend a somewhat large and heavy transformer off the PEMB purlins. I assume the load at 4 corners is never going to be equal and actual distribution will depend on how...
What load cases/combinations would you recommend for an elevated equipment platform supporting equipment many times the weight of the platform itself? Lateral loads in particular.
Seismic design category A, Sds=0.149, structure is inside so no W/S/R loads, no Live load on the platform itself...
In a moment transfer system like on the attached detail, how do one accounts for shear force between compression and tension side of the moment arm? I am probably missing something, but it keeps bothering me. Would not a crack develop as shown due to pure moment alone? Axial gravity loads are...
It might seem a like a silly question, but for some reason I am stuck thinking about it. Lets consider a typical PEMB portal frame designed to handle lateral loads. It is always designed with columns pinned at the base. However in reality those anchors will develop some moment capacity, and...
I need to design a reinforcement to resist moment loads from the column on top of a stem wall. There is a lot of information out there on anchoring to pedestals, but not so much when it comes to rectangular footings. Concrete breakout is a controlling factor, so I am adding vertical...
Hoping someone could double check my math here, I am doing everything by AISC books and can not match the results with RISA connections.
6x6x1/4 HSS subject to 240 kip-in load. 46ksi yield/58 ksi ultimate
5/16 weld (0.22 throat) Fexx=70
Since HSS wall thickness is 0.23 and 5/16 weld would not...
Any recommendations/references on how to calculate capacity for one of the connections pictured below or any better ways to design a connection between 6 x 6 x 1/4 HSS column and W6-15 beam for a full moment? With a beam height of only 6" and only a couple inches to spare under the beam, the...
