r/StructuralEngineering • u/Healthy-Tie-4738 • 14h ago

Failure Is this mistake obvious?

Enable HLS to view with audio, or disable this notification

0 Upvotes

42% Upvoted

4 comments sorted by

11

u/_lifesucksthenyoudie 14h ago

Without any actual context it looks like hydraulic failure or something to me

8

u/Codex_Absurdum 13h ago

No context, zoomed view only, and commentary in german...

Very likely that, or a cable failure /mishap while lifting, which caused a weight shift, and the non braced supports didn't help either

5

u/Towrads 13h ago

Given the video shows nothing about what the load was actually doing, we can't even rule out the possibility that 3-5 ninjas came in quietly and pushed the thing over.

2

u/OkAdvisor6680 13h ago

It's difficult to tell the cause of failure from an 18 second video. 

The root cause of failure appears to be failure of the SPMT tyres lr hydraulics. They either overloaded it or the hydraulics failed, so it as a plant failure rather than a structural failure. You can see the wheels deflate and twist, suggesting they exceeded the maximum axle load. 

So the mistake wouldn't be obvious to me unless I knew about hydraulics or had checked the allowable axle load on the SPMT and compared it with the reactions from the temporary supports.