I wasn't referring to the general classification of the building but
to the Compact Storage itself being light hazard (as per 20.6.1) -
again that is limited to 250 sf. As such, still sounds to me like we
are talking about apples and oranges.
For your arrangement I agree with you but would suggest the interior
metal barriers play a bigger role than the higher density (though not
saying light hazard) due to the slow activation of sprinklers typical
produced by metal enclosed records. Does this situation have the
automatic separation creating that small gap identified in the early
studies?
It doesn't sound like a modified 20.7 with a reduced height, thus the
protection should be defined by the EOR (by their appropriate subs)
verses a big X with sprinkler per 13 and leaving it up to the
contractor.
Roland
On Jan 20, 2011, at 2:44 PM, Jim Davidson wrote:
Roland,
Most of the rolling aisle file storage areas that I have reviewed
are approximately 8,000 sq. ft. in area, usually on the first floor
on in a basement area. The racks are approximately 8 ft tall and
approximately 20 to 30 ft in length without solid steel transverse
barriers. This type of storage is not considered as a "light hazard"
occupancy based on fuel load. It is usually considered as an Ord
Group II or Extra hazard area within a light hazard occupancy. This
type of storage should be protected based on the fuel load present
not the general hazard class of the facility.
You need to remember that when this type of file storage burns
someone is going to pay for the loss of the files and the resulting
loss of income for the institution. And the contractor referring to
NFPA 13 with the referenced testing done by the GSA available and
not refuted by NFPA 13 could leave the sprinkler contractor hanging,
especially if the contractor does not look at the details of the
shelving units being used, and the configuration of the storage
modules.
Regards
Jim Davidson
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