I've been using CSI SAFE and other software that allows the integration of design moments along a strip of a fixed width for my two-way slab design for over 10 years. Someone has asked me today what theory / reference this practice is based on, and to my surprise I was not able to find anything...
I've used stud rails before and it was a good experience, though maybe a bit expensive. Does anyone have any experience specifying stirrups as punching shear reinforcement above columns? I know the both ACI and CSA standards allow it, but I'm wondering if it the additional bars make the column...
The last time I had a look was about 10 years ago, external FRP reinforcement was next to useless because of the fire requirements in buildings (from memory, for flexure some percentage of service level loads needed to be maintained while ignoring the FRP reinforcement, which did not allow for...
Friend sent me this one, not sure what to make of it. Anyone know what kind of product this might be? Or are the anchor rods cut flush to the top of the nuts? I believe this is a new pedestrian bridge in Ottawa, Canada.
I've come across a simple (almost shameful) question that has me stumped. The initial question is whether we should "offset" all of the beams in our FEA models of steel structures so that the top of the beams all is level, which is how it's going to be in practice. I've never done this, but...
Trying to explain this to someone else, I found out there is a gap in my knowledge. I can't find any information about it in SAFE documentation, but it's really a quite simple question. When beams are modelled in SAFE, there must be an area where the beam and the slab are overlapping? How does...
Following up on this thread: https://www.eng-tips.com/viewthread.cfm?qid=450445
It's my understanding that 4.1.8.11.3) d) v) allows us to use a larger period specifically to check seismic deflections. This means I'll have a different base shear than my regular elastic analysis, so I always run a...
I'm trying to understand an example in Bathe's Finite Element procedures, but there is something I'm missing. He goes from elements stress to equivalent nodal point forces (he says "in the virtual work sense"), but I don't understand he's doing the transition. Can the forces at element nodal...
I'm looking at setting up calculations for steel angles (according to CSA S16-19) that will take into consideration any compression, flexion or combination of the two. I don't have a problem with calculating the section strengths, but I'm a bit confused with what I should take for maximum...
I have a project where we are using an aluminum substructure to attach granite panels (rainscreen building enveloppe). The aluminum substructure is attached to the building stud wall, which has studs at 16" O.C. and spans concrete slab to concrete slab. The substructure is attached with local...
I have a light weight box structure meant to be hung on the exterior of a building on cantilevered channels. As it is outside of the building envelope, it would be exposed to rain, which is why I'm thinking of having it hot-dip galvanized. To keep things adjustable, I'm being asked to have...
I recently got a job for an exterior siding installer. They want to get into bending of aluminum panels for use as exterior cladding. The architect requires engineering calculations for these panels. I stumbled upon this thread and am hoping to get the attention of berkshire who said he had done...
I'm working on a steel infill truss that will be used to attach thin natural stone panels to a concrete building. The building is 35 stories high with cantilevered concrete slabs. The infill structure is a "3D" box element that is 2' wide by 1' deep and will be suspended outside of the building...
I have a project where I am adding a 150 square meters extension to a more than 1500 square meter industrial buildling. Since there is no fire seperation between my extension and the existing building, I told client (contractor) that we were going to have to either :
#1 Add a firewall in between...
