I have a contractor asking if he can place a sanitary sewer, backfill w/ 57 stone to a foot over the pipe, then backfill the rest with 4-saying he wouldn't need to compact this. It is in a future parking lot (1-2 years out). Does anyone have experience in this area?
I have a contraction joint detail with 18" dowel bar (in basket) centered about a T/4 deep sawed joint. The welded wire fabric is shown ending 12" from each side of the joint. This produces a 3" gap with no reinforcing, since the dowel bar is only 9" on either side of the joint. Should the...
One of my clients has asked for a detail that shows trench repair with concrete reinforced with #10 mesh with 6"x6" openings tied into the existing concrete by dowels. Any thoughts or sources on this?
I've rerouted an existing fire loop around a new building on a manufacturing plant site. The owner wants a PIV at every valve location. These are surrounded by 4 bollards. The 2 valves I need to make the connection to existing fire main are in very awkward locations to have an above ground...
Why are manhole connections not allowed (discouraged) for sanitary sewer services? A standard drawing for a lateral connection shows a "trench dam" at 10' from the connection.
What does a trench dam do, and is it used when the connection is to a manhole?
I want to use a 12" pipe to outlet a detention pond. It is only 30' length going thru the embankment. The profile will slope up 4:1 to provide 2' of cover over 10' of the pipe, then slope back down 4:1. I planned on using a HW at the inlet and outlet end. When is anti-seep collar needed?
Hey guys-my first post:
I've designed a fire supply and retention pond and called out 18" deep ODOT Type C (6"-18"; avg. 12") for the pond edges. The contractor wants to put #2 stone.
Any experience?
Thanks
