Would anyone have a specification for the installation of the below monument? Does the specs state the type and strenght of concrete? We are looking to have a few of these installed on a project and need this information so that the contractor can list their price of this bid item.
Thank you,
Brad Luken, LS
(AZ, CA, NV & OR)
> Would anyone have a specification for the installation of the below monument?
I believe Bernsten's site has quite an extensive document on those stainless steel rods.
Thank you!
Brad Luken, LS
(AZ, CA, NV & OR)
In Louisiana, we call that a Class "A" monument. We use Redi-Mix for the concrete, the plastic sleeve in South Louisiana can vary between 20 to 60 feet, depending on the thickness of the recent Holocene deposits, and the 9/16 stainless steel rods usually go down 125 feet.
In Louisiana, we use them for their resistance to differential subsidence. They were originally devised by the Corps of Engineers Waterways Experiment Station as resistant to frost heave and later picked up by the National Geodetic Survey.
We have a couple of these at SFO and the datasheets state a B stability because they are not driven into bedrock, but to the point of refusal. Ours are about 60 feet (19.5 m) long as well.
SFO will be installing EMAS (engineered material arrestor system) at each end of two runways (19L&R and 1L&R) and from the geotechnical report the EMAS should cause approximately 8+ inches of settlement over the next 5 years. To monitor our seawall during the subsidence, I wanted to be sure adequate control points were installed.
Thank you all for the helpful information.
Brad Luken, LS
(AZ, CA, NV & OR)
When the government is back online do a search for FAA Circular AC150-5300-16. It contains extensive instructions on setting the stainless steel rod markers. If you just can't wait, send me an email and I'll send back this copy I downloaded.