Pole barn down spout location

[wewiserangers]

Stem wall is poured for a new building. Should I go ahead and put in the down spout drains now or wait until after the building is complete?

If I do it now how far off the corner of the foundation should the drains be? And how far away from the foundation? Just want to make sure I have it right to prevebt doing it twice.

Building is a 48x64. Downspout in each corner. Connecting two drains together into 4" sdr11 on each side.

 

[BurtEggley]

is this going to a sump or to a drainage system?

 

[dcg9381]

If I do it now how far off the corner of the foundation should the drains be? And how far away from the foundation? Just want to make sure I have it right to prevebt doing it twice.

Building is a 48x64. Downspout in each corner. Connecting two drains together into 4" sdr11 on each side.

Dude, need a photo. Some buildings of that size are fine with no drains and some are screwed.

But what I can tell you from doing water collection, is that bringing two drains together on a 3000 sqft building, you can easily exceed 4" of drain, at least here... And we get 30" of rain per year. Gallons per minute can be remarkable if you get 1" in 10 minutes.

4 spouts total? What's the ground level look like and where can you shed that water?

 

[wewiserangers]

Dude, need a photo. Some buildings of that size are fine with no drains and some are screwed.

But what I can tell you from doing water collection, is that bringing two drains together on a 3000 sqft building, you can easily exceed 4" of drain, at least here... And we get 30" of rain per year. Gallons per minute can be remarkable if you get 1" in 10 minutes.

4 spouts total? What's the ground level look like and where can you shed that water?

The site has great drainage with a natural slope away from the building in 3 directions so no issues there. I plan to surface discharge the pipes off the back of the building I just need to know how close to the building corner and distance from the foundation the risers should be to meet the down spouts.

 

[jack stand]

I'd allow for a down spout at/close to the midpoints.
That's a lot of s/f and unless you up to 6" gutters and the corresponding spouting.

It's not hard to overflow the gutters due to the spouting.

 

[Craig Balzer]

My hobby shop is 2/3 the size of yours; I've got 2,200 sq ft.
My main work area is 48x36 with an attached 24x24 smaller room.
I'm in Colorado Springs at 7400 feet bof elevation


I have only 4 down spouts - they are on the 4 corners.
I have a combination of drains that terminate 30' from shop; buried drains leading to open air spouts and in-ground drains; and I have one drain that leads to another spout:
Open air drain

/
Drain that is buried and opens on the surface of ground (see pile of rocks)

/
Here is drain that feeds from the higher roof to another down spout on the lower roof.
The downspout segment on the walk is from the boiler for the in-floor heating system

/
Been using my shop for 6 years - no issues to date

 

[jack stand]

I'd allow for a down spout at/close to the midpoints.
That's a lot of s/f and unless you up to 6" gutters and the corresponding spouting.

It's not hard to overflow the gutters due to the spouting.

I should have asked for your location and rainfall.
It's better to not have gutters than to regularly overwhelm them. That sends the water in bad directions, like into your soffits.

 

[jblnut]

I have a 54x72 and a 48x112 with gutters on them and both flow into 6” pipes for all down spouts. The 48x112 has two downspouts at each end and one in the middle and the gutter will still overflow at times.

The 54x72 has 6” single piece larger gutters with two total downspouts that I believe are 4x5” and I haven’t seen it overflow yet.

On the house I have 5” gutters that go into 3x3 downspouts that go into 4” verticals black corrugated pipes that flow into an 8” corrugated loop that rings the house. Never had a gutter overflow or see the underground system struggle.

If you run the underground pipe a long ways and have it fairly flat it won’t flow very well. You will never ever be able to utilize its full capacity as it needs air to keep the water flowing. When we size underground field tiling projects I like to figure no more than 1/3 full, which is why I upsized to 6” pipe for my underground gutter runs.

Larger pipe is a cheap upgrade to do it now vs later. There is no was a single 4” pipe is gonna take the volume coming off an entire side of that roof unless you live in the desert.

As far as where exactly, dig in corrugated verticals and keep them 6” from the building. It isn't hard to dig around them in the future to move them a little or way or another. You run the risk of having the building crew damage or smash them if you do it before the building is built. I’d wait until it’s finished.