UFC 4-023-03
25 January 2005
a) the lesser of 2.0 Ft or (ls/8.2) Ft
(kip)
or
b) 3% of the total ultimate vertical load carried by the
column or wall at that level
(kip)
where:
ls
= the floor to floor height (ft).
Where the peripheral tie is located within the wall, provide horizontal ties adequate to
anchor the internal ties to the peripheral ties.
Tie corner columns into the structure at each floor and roof level in each of
two directions, approximately at right angles, with ties having a required tensile strength
equal to the greater of a) or b) from the previous section.
8-2.7
Vertical Ties.
Tie each column and load-bearing wall continuously from the lowest to the
highest level. The tie must be capable of resisting a tensile force equal to the maximum
design ultimate dead and live load received by the wall or column from any one story.
When a wall at its lowest level is supported by an element other than a
foundation, make a general check for structural integrity (i.e., make a careful check and
take appropriate action to ensure that there is no inherent weakness of structural layout
and that adequate means exist to transmit the dead, live, and wind loads safely from the
highest supported level to the foundations).
8-2.8
Load-bearing Elements with Deficient Vertical Tie Forces.
If it is not possible to provide the required vertical tie force in any of the load-
bearing elements, apply the Alternate Path method for each such deficient element.
Remove each deficient element from the structure, one at a time, and perform an AP
analysis to verify that the structure can bridge over the missing element. The amount of
element to be removed from the structure is given in Table 8-1.
8-4
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