Mobile MRI and CT Units - Distance from Hospital or Medical Office Building - 2010 CBC

I have a mobile MRI unit that will be placed between a medical office building and a hospital building. OSHPD 3 applies to an area of the 1st floor of the MOB. I am aware of OSHPD PIN 34 (http://www.oshpd.ca.gov/FDD/Regulations/PINs/34.pdf) for location of the mobile unit in relation to the hospital building ... but would this also apply to the MOB building? The concern is related to the distance needed between the MOB and the mobile unit (wall ratings and opening protections). Is there anything else that may be a concern (electrical, etc.)?

Any thoughts are greatly appreciated.
Original Post
Annette,
You are not limited by the OSHPD PIN if you are reviewing/approving as a local AHJ for OSHPD category projects that are designated for local agency jurisdiction. The yards and fire ratings should be per CBC as required for "buildings". The exception would be for a truly mobile unit such as truck trailer type that remains on the road chassis while in use and will not be on site long enough to be considered "permanent" per CBC definitions.
Hit the "post now" button too soon.
There are significant electrical issues for connecting MRI or CAT units, recommend an electrical engineer review for system compatibility and capacity. Permanent wiring methods are typical unless "road" worthy and truly portable, then there will be a "commercial or special use coach" electrical connection pre approved by the CA commercial coach division.

MRI machines usually require sheilding or separation from certain types of magnetic capable metals (iron, nickel, cobalt, etc.), the information should be made available to you for ensuring that any adjacent light duty structures and iron conduit runs in electrical systems do not get damaged when the MRI is running. Usually it is not the magnetic force causing damage, it is the induced currents into metals that accelerate corrosion and cause quite a bit of interference to radio frequency components such as security card readers or unsheilded electronics. Especially important is distance warnings for persons with implanted heart regulators/defibrillators or pacemakers.

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