UFC 4-023-03
25 January 2005
Table 8-1 Removal of Deficient Cold-Formed Steel Vertical Tie Elements
Vertical Load-bearing
Definition of
Extent of Structure to
Element type
Element
Remove if Deficient
Primary structural
Clear height between lateral
Column
support member
restraints
acting alone
Length between intersecting
walls (perpendicular
All load-bearing walls
partitions, return walls,
that form the
internal room dividers), or
perimeter and
between columns. Minimum
External Wall
external face of the
length of wall to be
building but not room
considered 2.4 m (7.9 ft)
partitions
Clear height between lateral
restraints
Length limited between
intersecting walls or 2.25H,
All load-bearing walls
where H is the clear height
within the building
between lateral supports (i.e.
Internal Wall
including room
floor-to-floor).
partitions
Clear height between lateral
restraints
8-3
ALTERNATE PATH METHOD FOR COLD-FORMED STEEL.
The Alternate Path approach is used to verify that the structure can bridge
over removed elements. The general procedure provided in Section 3-2 must be
followed.
8-3.1
Acceptability Criteria for Cold-Formed Steel.
The acceptability criteria are provided in Table 8-2; calculate the required
design strengths per AISI/COS/NASPEC 2001. The subsequent actions for the AP
model after violation of the acceptability criteria are detailed in the following sub-
sections.
8-5
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