330
Partitions: Fire Safety
336.1
GYPSUM BOARD ON METAL STUD PARTITIONS (Figure 330 4)
Currently, UL Class E-1 partition Design No. 2 (5/8" gypsum board on
either side of metal studs at 2 on center) is an acceptable one-hour
partition with the exception that it has not been tested with a perimeter
relief runner detail at the head.
It is recommended that a partition of similar construction be tested with a
suitable relief runner detail in order than an economical partition equivalent
to one hour can be provided throughout the hospital.
UL Design No. 23, which incorporates a relief runner detail, is acceptable
as a one-hour partition. This partition, however, requires a double layer of
wall surface material on each side. In addition, it has a maximum vertical
span of 9'0".
UL Design No. 11 is rated for two hours with a relief runner detail. This
also requires two layers of wall surface material. The vertical span of this
design is acceptable for the range of required ceiling heights.
Until a partition constructed of one layer of gypsum board on each side of
metal studs with a suitable relief runner detail has been approved, the
corridor and smokestop partitions must consist of UL No. 11 or UL No. 23.
Other partitions should be capable of conversion to meet these
standards.
336.2
LAMINATED GYPSUM BOARD PARTITIONS
There are several UL one- and two-hour rated partition designs which
have been tested with relief runner details at the head. (See Figure 330-
3.) Similar proprietary systems are not all UL tested, however. For
instance, Vaughn Interior Walls' products are tested by the University of
California. These may be accepted by local fire marshals for individual
projects.
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