Bollard design
Bollard design
(OP)
I would like to design a bollard (and its sonotube footing)to behave as a guardrail in a parking lot... essentially, for a horizontal force of 5kips @ 2 ft above ground. I'm using a 6"OD pipe embedded into a 24" sonotube (4.5 ft deep in the ground).
Is there a code for bollards, or using geotechnical engineering principles will suffice?
Mover = 5x2 = 10kip-ft
Mstab = 8.58 kip-ft
Maybe there should be an allowance for deflection rather than keeping the bollard rigid?
Is there a code for bollards, or using geotechnical engineering principles will suffice?
Mover = 5x2 = 10kip-ft
Mstab = 8.58 kip-ft
Maybe there should be an allowance for deflection rather than keeping the bollard rigid?






RE: Bollard design
The description that you give (6" pipe, 4.5 ft. embeddment, 24" diameter encasement) is typical of what we would use for protection from heavy, off-road trucks, front end loaders, bulldozers, truck cranes, etc. If hit by a car, the car would most likely "lose".
For automotive applications we would normally go with something lighter, say a 4" pipe, 3 ft. embeddment, 16" dia. encasement.
However, it's really a judgement call, however since soil properties, pavement around the bollard, etc. are important factors.
www.SlideRuleEra.net
RE: Bollard design
They will usually quote a "designed to BS____" on them , then you can look up that, and the standards those standards themselves reference.