FAQ’s

J & J Xray

Concrete X-Ray

Concrete X-ray allows us to locate and identify the various materials within concrete, such as conduit, rebar, post-tensioned cable, and so on.

How it works: Concrete X-ray is similar to an X-ray a physician would administer to determine if an arm was broken. Film is placed on one side of the concrete and a source of radiation is placed on the opposite side. An exposure is made and the film is developed revealing what is inside the concrete structure.

 

X-ray Vs. Radar

Differences between Ground Penetrating Radar and Concrete X-ray
These are a few of the factors we use to determine which piece of equipment is best suited for your job and needs.

X-Ray

G.P.R.

Your Cost

More

Less

Can determine location

Yes

Yes

Can determine depth

No

Yes

Can differentiate between similar materials

Yes

No

Can locate plastic conduit

Yes

*No

Potential hazards

Surprisingly minimal

No

Access required

**2-sides

1-side

Area inspected in same amount of time

10”x 12”

48”x 48”

Maximum depth

24” (when using cobalt 60)

* Depends on many factors

*Please see “How radar works section”

**Please see “How X-ray works section”

doing radar

Ground Penetrating Radar

Ground Penetrating Radar (G.P.R.) is a safe, extremely fast, and accurate tool we use to locate materials within a concrete structure.

How it works: G.P.R. emits electromagnetic energies through a concrete slab. This energy travels until it hits an object within the concrete. A majority of the energy is reflected off the object and is returned to an antenna receiver. The amount of signal return is dependent on the object’s dielectric make-up; the higher the dielectric constant, the higher return of signal. Older concrete and plastics generally have a low dielectric constant and a low signal return, while steel, water, and mineral-rich mediums have a high dielectric constant and a higher return of signal.

utility locating pic

Utility Locating

As a construction professional, you have no doubt heard the phrase “call before you dig.” But, who exactly is on the other end of the line when you call?

Utility companies that respond to locate requests via the state One-Call system, or Did-Alert, only locate and mark utilities that they own and only up to their meter. After the point at which the product is metered, the utilities are considered privately owned. They will not mark privately-owned utilities, such as electric, gas, and water services. Many industrial complexes have privately-owned utility systems between main buildings and outlying buildings.

Subsurface Imaging, Inc. goes the extra mile for you. We find all of the utilities found within your project area, regardless of who owns them. By locating these utilities before you start your project, we help you avoid large repair bills, unproductive down time, and possible harm to personnel or equipment, all of which can greatly escalate your job costs.

When you really need to know if there are utilities in your project area, call Subsurface Imaging, Inc.

 

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Concrete Coring

Subsurface Imaging, Inc. now offers concrete coring to our line of services. Can you imagine, one call takes care of your concrete inspection and concrete coring needs? Better yet, bundling both services can save you time and money.

consulting

Consulting

Over the years, the plans (Known as “as-builts”) for older buildings can be misplaced or even discarded. If an engineer or architect must determine a building’s structural integrity, or simply understand how the building was constructed, we can assist them by essentially becoming their eyes.

We conduct a building study by using X-ray and GPR within a predetermined sample area to determine rebar size, rebar shape, (square vs. round, which also determines the age of the building), and the spacing, depth, and/or coverage. This information is then provided to the engineers and architects for further analysis and calculations.