Urban Storm Drain Design: Junction box standards.
-
Upload
esther-charla-blair -
Category
Documents
-
view
223 -
download
0
Transcript of Urban Storm Drain Design: Junction box standards.
![Page 1: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/1.jpg)
Urban Storm Drain Design: Junction box standards
![Page 2: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/2.jpg)
Junction box standards• Highlight various parts of Manhole Type M
standards and specification sheet.• Identify “things” that may confuse
• Feel free to mark on the sheet in your participant manual.
![Page 3: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/3.jpg)
Junction box standards
Similar to inlet considerations, rebar important. Sometimes can join boxes to maintain orientation If box over 6 feet wide -- special case , call BRG.
![Page 4: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/4.jpg)
Junction box standards
Riser does not have to be different dimension than the box
![Page 5: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/5.jpg)
Junction box standards• Make as many elements as possible identical
• Enhance constructability• Min/max dimensions: maximum is structural
limitation, if must exceed call BRG for guidance.• D+1 ft. becomes limiting with box structures – they
can get wide
![Page 6: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/6.jpg)
Junction box standards
• Try to make elements identical and repeatable• 1 set inlet, 1 set laterals, 1 junction
![Page 7: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/7.jpg)
Junction box standards
• Offsets are not a constraint. • Can have multiple offsets.• Can have multiple penetrations on a side.
![Page 8: Urban Storm Drain Design: Junction box standards.](https://reader033.fdocuments.us/reader033/viewer/2022051316/5697c0291a28abf838cd724d/html5/thumbnails/8.jpg)
Junction box standards
• When have high topographic relief, use drops in junction boxes to control energy and velocity.
• Try to keep time of travel in system similar to pre-development conditions.
• d/D, Q, and V tells us where we need to change D as move through the system.