Fender Pile Axial Capacity
Fender Pile Axial Capacity
(OP)
Anyone know why an engineer would spec out a fender pile to have 1,900 kips of axial capacity? I would think EI, Ma and radial compression would be the most important design criteria for a fender pile.
Question is going around the office since this spec doesn't seem to make sense.
Question is going around the office since this spec doesn't seem to make sense.






RE: Fender Pile Axial Capacity
If the pile is battered, such as being in a dolphin, axial capacity would be needed to resist horizontal force.
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RE: Fender Pile Axial Capacity
Hope they are not planning on these being structural and fender piles. Pick up some pretty nasty P-delta effects if they are....
RE: Fender Pile Axial Capacity
Although its rare, I've seen prestressed piles used as fender piles before. Was thinking maybe it could be a jacking force on a prestressed pile, but even that seems very high for a 16" pile.
Can you question the engineer's reasoning for this?
RE: Fender Pile Axial Capacity
I would think if no one is meeting the spec, that would raise a red flag....
RE: Fender Pile Axial Capacity
Let's assume its a solid cross section, for a 16" pile that load equates to a stress of roughly 9.45 ksi. Good luck finding any concrete or timber pile that's going to handle that. A 16" steel pile with a 1/2" wall thickness would be stressed to nearly 80ksi. Most steel piles I've seen have a yield of 35ksi, although higher strength steel is available (read more expensive).
That's like going car shopping and finding 2 similar cars at identical prices, then telling each salesman you'll buy their car if they can guarantee it to 1,900,000,000 miles... I just don't see it happening