Difference between revisions of "Curb cuts"

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==Example==
==Example==
A curb cut of 0.25 m is proposed as an inlet for an offline bioretention cell receiving runoff from an adjacent roadway. The gutter and the curb are made from smooth concrete with Manning's 'n' = 0.013. The x-slope is 3% and the longitudinal slope of the road is 2%. The design storm produces flow of 0.08 m<sup>3</sup>/s.  
A curb cut of 3 m is proposed as an inlet for an offline bioretention cell receiving runoff from an adjacent roadway. The gutter and the curb are made from smooth concrete with Manning's 'n' = 0.013. The x-slope is 3% and the longitudinal slope of the road is 2%. The design storm produces flow of 0.08 m<sup>3</sup>/s.  
 
The width to capture 100% of this flow is::


The width of inlet to capture 100% of this flow is::
<math>W_T=0.817\times(0.08)^{0.42}\times(0.02)^{0.3}\left (\frac{1}{(0.013)\times(0.03)}\right)^{0.6}</math>
   
   



Revision as of 01:13, 29 September 2017

Sizing[edit]

To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width::

Where the intention is to capture only a proportion of the flow, the ratio of flow entering the curb inlet may be calculated::

Example[edit]

A curb cut of 3 m is proposed as an inlet for an offline bioretention cell receiving runoff from an adjacent roadway. The gutter and the curb are made from smooth concrete with Manning's 'n' = 0.013. The x-slope is 3% and the longitudinal slope of the road is 2%. The design storm produces flow of 0.08 m3/s.

The width of inlet to capture 100% of this flow is::


Curb cuts Gallery[edit]