Line 4: |
Line 4: |
| <poem> | | <poem> |
| Curb cuts are a form of LID/BMP [[Inlets|inlet]]. They include a variety of modified curbs and spillways. | | Curb cuts are a form of LID/BMP [[Inlets|inlet]]. They include a variety of modified curbs and spillways. |
− | They are well suited to retrofit scenarios and to collect runoff from catchments with relatively gentle longitudinal slope, and/or a greater cross slope. This might be the local topography of a parking lot or a piece of parkland? | + | They are well suited to retrofit scenarios and to collect runoff from catchments with relatively gentle longitudinal slope, and/or a greater cross slope. This might be the local topography of a parking lot or a piece of parkland. |
| | | |
| As this inlet width is directly proportional to longitudinal slope; the required curb cut width increases rapidly on steeper roads. | | As this inlet width is directly proportional to longitudinal slope; the required curb cut width increases rapidly on steeper roads. |
− | '''Standard width (450 mm), as included in OPSD drawings should be compared to and modified for the flow requirements of the practice.''' | + | '''Standard width (450 mm), as included in Ontario Provincial Standard Drawings (OPSDs) should be compared to and modified for the flow requirements of the practice.''' |
| </poem> | | </poem> |
| | | |
| {| class="wikitable" | | {| class="wikitable" |
− | |+The OPSD collection of standard drawings for curb cuts include | + | |+The Ontario Provincial Standard Drawing (OPSD) collection for curb cuts |
| |- | | |- |
| !Flow direction | | !Flow direction |
− | !From asphalt catchment | + | !From asphalt curb and gutter |
− | !From concrete catchment | + | !From concrete curb and gutter |
− | !From either asphalt or concrete catchment | + | !From either asphalt or concrete outlet |
| |- | | |- |
− | |30 - 45 deg | + | |30 to 45 degree |
| |605.020 <ref name =OPSD>http://www.roadauthority.com/Standards/?id=b00e3771-6095-4257-b029-1d9879418039</ref> | | |605.020 <ref name =OPSD>http://www.roadauthority.com/Standards/?id=b00e3771-6095-4257-b029-1d9879418039</ref> |
| |605.010 <ref name =OPSD/> | | |605.010 <ref name =OPSD/> |
| |605.040 Asphalt Spillways <ref name =OPSD/> | | |605.040 Asphalt Spillways <ref name =OPSD/> |
| |- | | |- |
− | |90 deg | + | |90 degree |
| |604.020 <ref name =OPSD/> | | |604.020 <ref name =OPSD/> |
| |604.010 <ref name =OPSD/> | | |604.010 <ref name =OPSD/> |
| |605.040 Asphalt Spillways <ref name =OPSD/> | | |605.040 Asphalt Spillways <ref name =OPSD/> |
| |} | | |} |
− |
| |
| | | |
| ==Sizing== | | ==Sizing== |