ironically, I took a short webinar on HSS members last week for PDH credits.
If you wish Download the presentation:
https://steeltubeinstitute.org/2023-webinar-series
Didn't know anything about this until posted the other day. The contraption was built in 2015, probably engineered a yr or two earlier, in accordance with AISC-10. The new designs are to be in an up-dated Limit States Design, controlling plastic shear and punch thru in HSS thin-walled members (like the column on the coaster).
It appears to be shear and wall bending failure.......the new Limit States design addresses this failure mode.
Additional Changes
Good article & Girl picture Link: https://informedinfrastructure.com/...-to-aisc-360-16-affect-hss-connection-design/
Reason for Change
"It wasn’t too long ago that a Hollow Structural Section (HSS) spec didn’t even exist. AISC 360-05 was the first time HSS connection provisions were brought into the main body of the specification and were introduced as Chapter K. Shortly after, AISC Design Guide 24 was published, which includes many charts for the various connections. The charts then were incorporated into the main specification in 2010."
• There is a “new” limit of applicability pertaining to the ends of members.
If your connection occurs close to the end of the HSS member, the allowable resistance equations may not apply.
This is not a new phenomenon. Hopefully, most designers have been adding cap plates or other means of stiffening the walls of a tube if the connection occurs in close proximity to the open end of the member.
"Carowinds shut down the ride. They released a statement on the subject, explaining that their team was “conducting a thorough inspection and the ride will remain closed until repairs have been completed.” They go on to explain;"
“Safety is out top priority, ad we appreciate the patience and understanding of our valued guests during this process. As part of our comprehensive safety protocols, all rides, including Fury 325, undergo daily inspections to ensure their proper functioning and structural integrity.”
🤔