I'm definitely not in favor of yearly assessments for buildings. If this is multiple choice and I have to pick one of your options then I'd choose the until it falls down one.
Interesting that you chose the yearly auto inspection because that's one of my pet peeves. I've got a weird quirk where...
I've got a good sample here and that was my goal, getting feedback on how the gen pop would view this. Thanks for the responses.
No one is changing any minds at this point, but to respond to this one - you seem to be implying that an additional story will cause a failure and comparing the...
@Greenalleycat - You seem blinded by seismic rage. I'm not suggesting that adding a 4th floor doesn't increase the risk relative to its current state. I also don't think that there's any lack of appreciation for seismic behavior, but it doesn't trump all other considerations. Why let them use...
The curve has shifted over quite a bit towards the negative region.
100%, there is zero chance that it meets any modern detailing requirements.
To be clear, I am not trying to get away with something. I'm not posting on a public forum about a plan to try and sneak something past the...
Nice spread on responses. If I take 0 as neutral, + as do it, - as don't do it: koot (+2), struct (+1), tlhs & jae (2 x -1), green (-2).
@Kootk: I'm roughly where you're at right now. One thing that concerns me wrt to the likely detailing is that in my experience with old concrete buildings...
No original drawings. Yes, taking the same liability as any similar renovation project. I'm only interested in how reasonable the seismic upgrade vs no upgrade seems. Sounds like 1 vote for somewhat reasonable.
Probably no b&w answer here, just looking for opinions for and against the following argument.
I've got a client looking at a 3 story conc building that is approximately 100yrs old and was originally a manufacturing plant. Based on the column and beam sizes it was intended for very heavy use...
I looked at that old thread and I'm going to add a steel column, probably sim to the channel detail that kootk had. That was my inclination but it's a last minute change so I was beating it to death before switching. Thanks for sharing that thread.
I've got a condition where I need to connect a new steel beam to an existing 24" circular column. Beam rxns are about 30k ultimate. This is a renovation. The original building drawings showed 22" sq. 7ksi columns and we had designed plates with post installed anchors to support the new beam. But...
SDC D, small single story structure. This meets the exception in 341 to allow for an OMF to be used. The provisions do not prohibit the use of HSS, there are no particular requirements for members. I cannot do an r=3 here, not allowed in sdc d.
The client wants all HSS, beams and columns. 341...
@Bones - That was novel(ish) at the time but has since been replicated quite a bit. Often they go ahead with concrete cores and use those in place of braced frames. Either way the modular columns still act as columns, and are governed by aisc. I have quite a bit of info and drawings on that...
@Deker - Yes, that makes sense in general. I'm looking in particular at modular construction and how it satisfies this requirement. It seems clear that it does not but I'm digging around to see if it's that simple, i.e. they just ignore it on the basis that there's a lot going on here that makes...
@Josh - Yes, this is what I'm asking about. When you say "I'd argue" - what is the argument? This is being done frequently in modular. There are some very big steel buildings, for example atlantic yards in brooklyn @34 stories, citizen m hotel in manhattan @20 stories, and many others. I have...
341-16 D2-5a states that column splices shall be located 4ft above the beam/column connection. I am not asking why this is useful for erection, for safety, etc. - I get those. I am asking if anyone knows of any commentary or discussion that allows splices at other locations, in particular just...
They're not filler/formwork. Treat it like a fragile one way spanning system, with very little ability for load to make its way around openings. These are common in the northeast for early 20th cent buildings. For new openings I have always made them remove a slot from steel beam to steel beam...
I'm curious about examples where an engineer's personal assets get targeted. I've not seen any examples of this and can't think of any. It's a fear we all have, but over time I've come to think that we are actually at very low risk for personal exposure. Even in the hyatt collapse case, I don't...
SAFE is terrible at recognizing openings. It gets it wrong 1/2 the time. You have to check the perimeter for every column to make sure. Often if you move your opening by a tiny amount, say 0.05, it will recognize it. You can manually define the perimeter but the interface is terrible, better off...
