PART 2
PRODUCTS
2.1
SHIELDED ENCLOSURE CHARACTERISTICS
2.1.1
Radio Frequency Interference Attenuation
The attenuation and shielding effectiveness requirements apply to the
finished shielded enclosure[s] and enclosure's components when all power
line filters are installed and carrying current, ventilation systems are
operating, [the coaxial connector panels capped,] and shielded door[s] are
in normal operating position. The specified shielding effectiveness shall
be achieved without using conductive tapes, gaskets, or cement materials.
Provide enclosure[s] having the following minimum magnetic, electric, and
plane wave attenuation:
Magnetic - [60] [_____] dB at 14 KHz increasing linearly to [100]
[_____] dB at 200 KHz
Electric - [100] [_____] dB from one KHz to 50 MHz
Plane Wave - [100] [_____] dB between 50 MHz and 10 GHz
2.1.2
Sound Transmission Class (STC)
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NOTE: STC 30 provides only minimum sound
transmission loss. For greater sound control, more
detailed acoustical design requirements must be
incorporated into the specification.
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Provide enclosure[s] having an STC of [30] [_____] dB minimum when tested
according to ASTM E 90 [not including sound transmission loss of
surrounding building construction].
2.2
STEEL AND WELDING MATERIALS
AISC 316.
2.2.1
Shielding Steel
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NOTE: Be aware that shielding steel thickness
should not be based solely on the minimum thickness
required for RFI/EMI attenuation. Thicker steel may
be necessary because of structural factors and heat
deformation or burn-through from seam welding.
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ASTM A 366/A 366M or ASTM A 568/A 568M, minimum [_____] [_____] gage.
2.2.2
Welding Electrodes
AWS D1.1/D1.1M for Metal Electrode, Inert Gas (MIG) welding method.
2.2.3
Floor
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NOTE: Indicate or specify whether other flooring is
SECTION 13094N
Page 11
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