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Prestressed Concrete Pile Nominal Capacity 1

AskTooMuch

Petroleum
Jan 26, 2019
273
I have an existing foundation on piles.
The Prestressed Pile Concrete drawing detail shows the pile length, size, etc.. is also says "30 Ton Nominal Capacity". This was done in 1988.

Few things that makes me wonder is why is this drawing showing Nomina Pile capacity instead of Allowable.
Basically saying it's up to to the Structural Engineer to choose the safety factor to change this to Allowable?
Capacity also seem very low compared to other pile in the area.
There was pile testing done as shown in the drawing. Shouldn't pile testing be driven to Allowable pile capacity not Nominal capacity.
My gut feeling is this pile drawing is allowable/already have FS except for the word Nominal.

Has anyone encountered similar where the pile drawing shows Nominal Capacity but actually meant Allowable?
 
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Applied , service load . ( not ULS ).. Typical ( G+Q)

Are you saying I can compare Nominal Pile Capacity to Service Load (SLS)?
No need to add safety factor to the Nominal Pile Capacity to make it Allowable Pile Capacity?
I live in the US.
 
YES.. Unfactored loads .
Thanks.

The "unfactored loads" is also currently called Allowable Load Combination. That's where my confusion is because this is called Nominal Pile Capacity (not allowable).

How do I confirm that Nominal Pile Capacity already has safety factor? Is it common practice back in the day to call it nominal instead of allowable?
 

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