UFC 4-023-03
25 January 2005
Figure B-5 Peripheral Tie Detail for Corner Columns
B-3.1.3
Horizontal Ties to External Columns and Walls.
In SI units, the equation for horizontal tie forces to external columns and walls
is:
a) the lesser of 2.0 Ft or (ls/2.5) Ft
(kN)
or
b) 3% of the largest factored vertical load carried by the
column or wall at that level
(kN)
where:
ls
= the floor to floor height (m).
The justification for these values appears to be engineering judgment as to the forces
that are required to keep a column or wall vertical (i.e., minimizing the possibility of a
large P-∆ effect). Note that the second portion of requirement a) is scaled by the floor
to floor height, to account for larger story heights; 2.5 m was a typical British floor
height.
B-3.1.4
Vertical Ties.
As stated in the UFC, each column and each load-bearing wall must be tied
continuously from the lowest to the highest level. The tie must have a required strength
in tension equal to the maximum factored sum of the Dead and Live Load received by
B-7
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