Difference between revisions of "Structural practices summary"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
m (Redirected page to Site considerations)
 
(19 intermediate revisions by 3 users not shown)
Line 1: Line 1:
{| class="wikitable" style="width: 150%; height: 200px;"
#REDIRECT [[Site considerations]]
|+ LID Design Guide Detail
 
|-
!style="background: cyan; color: black"|
!style="background: cyan; color: black"|Available Space
!style="background: cyan; color: black"|Site Topography
!style="background: cyan; color: black"|Available Head
!style="background: cyan; color: black"|Soils
!style="background: cyan; color: black"|Pollution Hot Spot Runoff
!style="background: cyan; color: black"|Setbacks from Buildings
!style="background: cyan; color: black "|Proximity to Underground Utilities
!style="background: cyan; color: black"|Set Backs
!style="background: cyan; color: black"|Drainage Area and Runoff Volume
!style="background: cyan; color: black"|Wellhead Protection
!style="background: cyan; color: black"|Water Table
!style="background: cyan; color: black"|Overhead Wires
!style="background: cyan; color: black"|Flow Path Length Across Impermeable Surface
!style="background: cyan; color: black"|Winter Operations
!style="background: cyan; color: black"|Vehicle Loading
!style="background: cyan; color: black"|Structural Requirements
!style="background: cyan; color: black"|Roof Slope
|-
![[Roof Downspout Disconnection]]
|Simple downspout disconnection requires a minimum flow path length across the pervious area (at least 5 metres) and suitable soil conditions. If the flow path length is less than 5 metres and soils are hydrologic soil group (HSG) C or D, roof downspouts should be directed to another LID practice such as a rainwater harvesting system, soakaway, swale, bioretention area or perforated pipe system.
|Disconnected downspouts should discharge to a gradual slope that conveys runoff away from the building. The slope should be between 1% and 5%. Grading should discourage flow from reconnecting with adjacent impervious surfaces
|
|If the infiltration rate of soils in the pervious area is less than 15 mm/hr, they should be tilled to a depth of 300 mm and amended with compost to achieve an organic content in the range of 8 to 15% by weight or 30 to 40% by volume.
|Downspout disconnection can be used where land uses or activities at ground-level have the potential to generate highly contaminated runoff as long as the roof runoff is kept separate from runoff from groundlevel impervious surfaces
|
|
 
|-
!Cistern
!Not applicable
!|1:1||Not applicable||0||0||0||Yes||None||None||None
 
|-
!Roof Downspout Disconnection
!Not applicable
!|[5 to 100 m<sup>2</sup>]||Amend if < 15 mm/hr||0.5||5 to 20||1 to 5||Yes||Building Foundation||None||None
|-
!Soakaway, Infiltration Trench or Chamber
!1
!|5:1 to 20:1||Not a constraint||1 to 2||0 to 1||<15 %||No||4m- Building Foundation<br>Underground Utilities, Trees,<br>Drinking Water Wellhead<br>Protection Areas||1 m||2 yr
|-
!Bioretention
!1
!|5:1 to 15:1||Underdrain required<br>if < 15 mm/hr||1 to 2||5 to 10||0 to 2||No||4m- Building Foundation<br>Underground Utilities, Trees,<br>Drinking Water Wellhead<br>Protection Areas||1 m||2 yr
|-
!Biofilter (Filtration only Bioretention Design)
!Not applicable
!|5:1||Not applicable||1 to 2||2 to 5||0 to 2||Yes||Building Foundation, Trees||None||None
|-
!Vegetated Filter Strip
!1
!|5:1||Amend if < 15 mm/hr||0 to 1||15 to 20||1 to 5||No||None||None||None
|-
!Permeable Pavement
!1
!|1:1 to 1.2:1||Underdrain Required <br> if < 15 mm/hr||0.5 to 1||0||1 to 5||No||4m-Underground Utilities<br>Drinking Water Wellhead<br>Protection Areas||1 m||2 Yr
|-
!Enhanced Grass Swale
!1
!|5:1 to 10:1||Not applicable||1 to 3||5 to 15||0.5 to 6||No||4m- Building Foundation<br>Underground Utilities||1 m||None
|-
!Dry Swale (Bioswale)
!1
!|5:1 to 15:1||Underdrain Required <br> if < 15 mm/hr||1 to 3||5 to 10||0.5 to 6||No||4m (3m if impermeable liner<br>is used)Building foundation,<br> Underground utilities, drinking<br>water wellhead protection areas||1 m||2 Yr
|-
!Perforated Pipe System
!1
!|5:1 to 10:1||Not a constraint||1 to 3||0||< 15%||No||4m- Building Foundation<br>Underground Utilities, Trees,<br>Drinking Water Wellhead<br>Protection Areas||1 m||2 Yr
|}

Latest revision as of 17:24, 12 April 2019

Redirect to:

Retrieved from "https://wikidev.sustainabletechnologies.ca/index.php?title=Structural_practices_summary&oldid=10221"