Water Main Parallel to Structure Distance
Water Main Parallel to Structure Distance
(OP)
What is the minimum safe distance between a Water Main running parallel to a Buliding Structure with a basement?
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Water Main Parallel to Structure Distance
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RE: Water Main Parallel to Structure Distance
“ 4.3.2.5 Rock conditions. When excavation of rock is necessary, all rock shall be removed to provide a clearance below and on each side of all pipe, valves, and
fittings of at least 6 in. (150 mm) for nominal pipe sizes 24 in. (610 mm) or smaller and 9 in. (230 mm) for nominal pipe sizes 30 in. (762 mm) and larger. When excavation is completed, a layer of appropriate backfill material (see Sec. 4.2.5) shall be placed on the bottom of the trench to the appropriate depths, then leveled and tamped.”
The above passage is immediately followed by,
“4.3.2.5.1 These clearances and bedding procedures shall also be observed for pieces of concrete or masonry and other debris or subterranean structures, such as masonry walls, piers, or foundations that may be encountered during excavation.”
Of course as previously inferred other considerations or authorities might supersede these requirements e.g. another section of this same standard states, “4.3.1.3 Clearance. When crossing existing pipelines or other structures, alignment and grade shall be adjusted as necessary, in accordance with the contract documents, to provide clearance as required by federal, state, or provincial, and local regulations or as deemed necessary to prevent future damage or contamination of either structure.”
RE: Water Main Parallel to Structure Distance
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Water Main Parallel to Structure Distance
RE: Water Main Parallel to Structure Distance
BigInch
-born in the trenches.
http://virtualpipeline.spaces.msn.com
RE: Water Main Parallel to Structure Distance
First of all, what is the easement for the water pipeline? Does the easement actually go all of the way to the building?
A rule of thumb is probably 10 feet minimum. For example, most petroleum companies ask that you stay 10 feet away (side to side) horizontally and 2 feet vertically.
You should address the future requirements of maintenance. If the pipe is deep, is it possible that you may undermine the building when you are doing maintenance in the future?
You also should be concerned should the pipe leak. The leak is probably going to run along the length of the pipe in unconsolidated material. If the pipe is close to the building, the leakage may end up in the building underdrain.
You also have to be concerned about the soils. How are you going to compact the soils adjacent to the building without damaging the building foundation? Note that water mains are unusally unrestrained pipes and rely on the soil to hold them in place. This is a soils geotech issue as well.