Allowable foundation settlement - portal crane
Allowable foundation settlement - portal crane
(OP)
Has anyone seen a specification for allowable settlement of foundations for a traveling portal crane.
Is there a general allowance or does it depend on each portal crane specifically.
The size of the crane is somewhere between 100t to 500t.
There is a strip footing along each track. I'm not sure if piling is normally required. Ground locally, will consist of imported sand fill most likely.

Is there a general allowance or does it depend on each portal crane specifically.
The size of the crane is somewhere between 100t to 500t.
There is a strip footing along each track. I'm not sure if piling is normally required. Ground locally, will consist of imported sand fill most likely.

RE: Allowable foundation settlement - portal crane
RE: Allowable foundation settlement - portal crane
We don't have a manufacturer yet. This is still early stages.
RE: Allowable foundation settlement - portal crane
I wouldnt be making any guesses. Id let your client advise what to adopt at these preliminary stages.
RE: Allowable foundation settlement - portal crane
I was aware it has something to do with travelling, and how much incline the motors can overcome.
But we don't have a specification though.
RE: Allowable foundation settlement - portal crane
So likely less than that
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just call me Lo.
RE: Allowable foundation settlement - portal crane
https://www.aisc.org/globalassets/modern-steel/ste...
RE: Allowable foundation settlement - portal crane
RE: Allowable foundation settlement - portal crane
These cranes are sensitive to any deflection (including settlement) and this is a good question to ask early.
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just call me Lo.
RE: Allowable foundation settlement - portal crane
The attached document from Retrograde is quite useful.
RE: Allowable foundation settlement - portal crane
Sorry to have missed that line. The idea of "mat foundation" is based on the notion that it is a better approach to overcome complications due to differential settlement. And, at the preliminary stage, with the worst-case scenario, any change thereafter is likely to bring down the cost rather than escalation.
@mte12,
If footing is already in place, how do you install piles?
RE: Allowable foundation settlement - portal crane
So installation is future.
RE: Allowable foundation settlement - portal crane
RE: Allowable foundation settlement - portal crane