We are looking to use an impact echo method to check an existing slab for thickness, as well as cracks and voids. The idea was to set up a grid, an analyze each grid center. Is there anywhere that states what size grid is recommended for this type of application? I was thinking 1ft x 1ft grids...
I have a foundation that the customer wants to raise the existing floor level. The anchor bolts see strictly shear load. I have used coupling nuts in the past when the bolts were loaded in tension. I have tried finding rating for coupling bolts in shear but have been unsuccessful. Has anyone...
I have a potential project in a permafrost area. I have little info known yet on the site. We would like to have an underground concrete bunker for equipment. Customer has fear of installing an underground bunker due to chance of uplift of the bunker. An idea I have that I wanted to get some...
I work for a company that is based in the U.S., but we do work all over the globe. We have some standard designs that we use, and one of the new compatibility requirements is the use of 5000 psi concrete. My question is what kind of availability do you think is out there for this strength concrete?
Has anyone ever used the "Concrete Tester and Surveyor (CTS-02)"? It is made by the Nitto Construction company in Japan. It was featured in an ENR.com article. It was also featured in a booth at world of concrete. Unfortunately I didn't go...
I am looking for non destructive concrete testing methods to use on old foundations. I am testiing to check the integrity of the concrete. I have been researching Shmidt Test Hammer, Windor Probe, and UltraSonic Testing. Any preferences or suggestions would be helpful.
I have an equipment foundation that is subject to sliding. The soil below is Sandy Silt with a low angle of internal friction (13°). Would the better recomendation ground improvements be a structural fill, or could cement stablization be used here? This work is being done overseas and I am not...
I am designing a foundation that equipment goes onto. There are no columns or walls that it supports. The foundation recieves heavy static loading. Any suggetsions on formulas to analyze this type of foundation. In the past we used 3+ft foundations with both a top and bottom rebar mat.
I am looking to design a slab on grade as a standard (non site specific) foundation. Does anyone have a good rule of thumb to use when little info is known?
