EMF in Facilities

Magnetized structural steel in buildings can cause a number of interference problems.

In commercial buildings, the most prevalent concerns are about EMI equipment interference issues or possible health effects from EMF. Sources of AC magnetic fields emitted by a building's electrical distribution systems include breaker panels, transformers, cabling, etc. It is not uncommon to find multiple areas in buildings, adjacent to high current equipment, with elevated AC magnetic fields. Passing utility power distribution or transmission lines can also cause elevated AC magnetic fields inside adjacent buildings.

Although rare, some buildings may experience EMI problems from structural steel which has become permanently magnetized during welding or by some other means, resulting in elevated DC magnetic fields.

The presence of RF or radio frequency EMF inside certain buildings from near by communication antennas can cause interference with wireless networks, communications equipment and other sensitive electronic systems. External RF signals can be especially troublesome in special use buildings, such as Data Centers, hospitals, research laboratories, broadcasting studios, where they can cause serious interference problems with sensitive medical, research, recording equipment, etc. Further, RF sources inside buildings, such as handheld two way radios, etc. can cause EMI problems with sensitive equipment.

FMS provides EMF/EMI consulting, analysis, measurement, mitigation and shielding for every type of facility. We have over 15 years of experience, successfully creating EMF environments which are appropriate to their purpose. Our process begins with a land survey, facility testing, modeling EMI risk, and if needed, proceeds to installation of shielding materials and techniques which result in compliant environments, across a wide performance range. FMS’ restrained use of shielding and consultative approach consistently produces the most effective EMF plans for our clients.