25 January 2005
= Dead Load (lb/ft2)
= Live Load (lb/ft2)
= Lesser of: i) the greatest distance in the direction
of the tie between the centers of columns or other
vertical load-bearing members where this distance
is spanned by a single slab or by a system of
beams and slabs, or, ii) 5 h. (ft)
= Clear story height (ft)
= "Basic Strength" = Lesser of (4.5 + 0.9 Ns) or
= Number of stories including ground and basement
One Way Spans.
In the direction of the span in a one way span, the internal ties must resist the
greater of the required tie strengths specified in a) and b) of Section 6-2.5.2.
In the direction perpendicular to the span, the internal ties must resist a
required tie strength of Ft.
The required tie strength for peripheral ties is 1.0 Ft.
Place peripheral ties within 1.2 m (3.9 ft) of the edge of a floor or roof or in the
perimeter wall and anchor at re-entrant corners or changes of construction.
Horizontal Ties to External Columns and Walls.
In SI units, each external column and every meter length of external wall
carrying vertical load must be anchored or tied horizontally into the structure at each
floor and roof level with a design tie strength equal to:
2.0 Ft or (h/2.5) Ft, whichever is smaller
Clear story height (m)
"Basic Strength" = Lesser of (20 + 4 Ns) or 60
Number of stories including ground and basement