# formulas.danish_capacity()

Capacity at the time of driving from the recalibrated Danish formula.

Usage

[Source](https://github.com/lornearnold/driven-pile/blob/main/src/driven_pile/formulas.py#L29-L61)

``` python
formulas.danish_capacity(
    bpf,
    stroke,
    ram_weight,
    pile,
    c1=0.45,
    c2=0.0,
)
```

## Parameters

`bpf: array_like`  
Blows per foot.

`stroke: array_like`  
Hammer stroke, ft.

`ram_weight: float`  
Ram weight, kips.

`pile: Pile`  
Pile geometry and modulus.

`c1: float = 0.45`  
Multiplicative and additive (kips) recalibration coefficients.

`c2: float = 0.45`  
Multiplicative and additive (kips) recalibration coefficients.

## Returns

`ndarray`  
`c1 * W h / (s + s0) + c2`, kips, with the set per blow `s = 1 / bpf` ft.

## References

Sorensen and Hansen (1957); Reddy and Stuedlein (2013), Puget Sound recalibration with unadjusted hammer energy.