Sewer Manhole

**Chris** · 01-05-2010, 10:25 PM

Here is a couple of pictures of how a sewer manhole is put together for those of you who have not seen it done. Normally it is done in a trench but the soil here was very unstable so we had to do what is called a V-ditch so that it could not cave in on us.

After this we toss on the ring and cover and bury it, alot simpler than people would think.

rustywrangler · 01-05-2010, 11:26 PM

Do you hand form the base, or do you have some sort of template for that concrete pour???

Didn't know it was that simple.

**Chris** · 01-05-2010, 11:34 PM

Quote:

Originally Posted by rustywrangler

Do you hand form the base, or do you have some sort of template for that concrete pour???

Didn't know it was that simple.

We have a steel ring that makes the outer circle and everything else is done by hand. We have trowels that are the channel size and from there just normal concrete tools and some manual labor, it is pretty simple. The tough part is when you are in a 20 foot deep trench trying to do this with shoring all around you and the trench is only a foot or two wider than the manhole.

**DUNBAR PLUMBING** · 01-06-2010, 05:05 AM

Do the inspectors require inspection of the base before you set the collars? BTW, nice workmanship on the waterways.

**Chris** · 01-06-2010, 02:07 PM

Yeah we have to have the bases inspected before we can stack the shafting.

**Chris** · 01-06-2010, 02:36 PM

Quote:

Originally Posted by rustywrangler

Do you hand form the base, or do you have some sort of template for that concrete pour???

Didn't know it was that simple.

Here is a pic of one of the guys setting up the base.

BRad704 · 01-06-2010, 05:58 PM

Yeah, its all nice and neat and clean NOW... I had to inspect all 109 manholes in a 20 year old subdivision a few years ago due to excessive stormwater at the treatment facility.

It is actually pretty cool to see how they are installed, since I've already seen the inside of a "working model"...

**DUNBAR PLUMBING** · 01-06-2010, 06:00 PM

People don't understand...how difficult that work is right there. Risks involved as well.

**Chris** · 01-06-2010, 06:20 PM

Quote:

Originally Posted by DUNBAR PLUMBING

People don't understand...how difficult that work is right there. Risks involved as well.

Exactly you have a piece of plywood and some aluminum jacks keeping you from being crushed.

Montybell · 01-06-2010, 07:01 PM

Well I feel stupid but what does that do?

01-06-2010, 05:05 AM	#4
DUNBAR PLUMBING MASTER PLUMBER Join Date: Jan 2010 Location: Northern Kentucky/Greater Cincinnati Area Posts: 47	Do the inspectors require inspection of the base before you set the collars? BTW, nice workmanship on the waterways. __________________ Northern Kentucky Plumbers

01-06-2010, 06:00 PM	#8
DUNBAR PLUMBING MASTER PLUMBER Join Date: Jan 2010 Location: Northern Kentucky/Greater Cincinnati Area Posts: 47	People don't understand...how difficult that work is right there. Risks involved as well. __________________ Northern Kentucky Plumbers

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01-05-2010, 11:26 PM	#2
rustywrangler Junior Member Join Date: Jan 2010 Posts: 9	Do you hand form the base, or do you have some sort of template for that concrete pour??? Didn't know it was that simple.

01-06-2010, 02:07 PM	#5
Chris Moderator Join Date: Jan 2010 Location: Wildomar, CA Posts: 746	Yeah we have to have the bases inspected before we can stack the shafting.

01-06-2010, 05:58 PM	#7
BRad704 Moderation Join Date: Jan 2010 Posts: 305	Yeah, its all nice and neat and clean NOW... I had to inspect all 109 manholes in a 20 year old subdivision a few years ago due to excessive stormwater at the treatment facility. It is actually pretty cool to see how they are installed, since I've already seen the inside of a "working model"...

01-06-2010, 07:01 PM	#10
Montybell Junior Member Join Date: Jan 2010 Posts: 14	Well I feel stupid but what does that do?