Steel Pipe Bollards design
Steel Pipe Bollards design
(OP)
Have a reviewer at a city that wants statement that a 4" steel pipe bollard, concrete filled, 36" imbed, 36" above ground will withstand 12,000 pounds at the 36" mark.
Im not an engineer of any kind, just trying to get a project permitted.
If it were a 4000lbs vehicle moving at 15mph would the bollard work. Deflection expected.
Thanks,
Mr, Uneducated.
Im not an engineer of any kind, just trying to get a project permitted.
If it were a 4000lbs vehicle moving at 15mph would the bollard work. Deflection expected.
Thanks,
Mr, Uneducated.






RE: Steel Pipe Bollards design
In the IBC world, the loading is 6k at 2'-3" for a vehicle impact in a garage. Are they making up the loading? Or is this an AASHTO requirement?
Sounds like you need to hire an engineer.
When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.
-R. Buckminster Fuller
RE: Steel Pipe Bollards design
The DOD uses 4000LB load at 30 mph for design of bollards that are intended for security. This publication from the FTA, FTA-TRI-MA-26-7085-05/DOT-VNTSC-FTA-05-02, has details of bollards used for physical security.
RE: Steel Pipe Bollards design
Thanks
RE: Steel Pipe Bollards design
Perhaps your reviewer doesn't realize that the 12k requirement shouldn't apply in this case.
RE: Steel Pipe Bollards design
12,000lbs force is nigh on 6 tons - He needs to justify where that requirement comes from first otherwise you will spend time and money trying to meet a requirement from an individual who may have seen it somewhere but for something completely different.
These sorts of bollards are to prevent really low speed movements, not 15 mph.
I pity you trying to talk sense to your reviewer but give it a go and if it gets thrown back then you need to try and find his superior and talk some sense.
Good luck and let u know how it goes....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Steel Pipe Bollards design