CEMP-E
TI 809-07
NOVEMBER 1998
(3) Deflection limits. The allowable steel stud horizontal deflection,
due to the
controlling lateral load is defined as follows:
L
(Eq 4-1)
600
Where:
L = The vertical span of the steel studs in mm (in).
(4) Selection of top and bottom runners. The base metal thickness for the steel
stud runners is equal to or greater then for the steel stud. The thickness of the top
runner, t will be sized as follows:
1/ 2
7.5338(P)(e)
(Eq 4-2)
t
Fy (beff )
Where:
P = the top end wind load reaction (lbs).
e = the gap between the inner top track and the outer top track as shown in figure 4-1,
(in).
F = the yield strength of the top runner metal (psi).
y
b
= the effective width of the top channel flange for analysis (in).
eff
is equal to the stud spacing. With single track systems, b
For double track systems, b
eff
eff
is equal to:
e D
(Eq 4-3)
b eff
Wstud
2
tan( 30 )
Where:
W
= the width of the stud flange (in).
stud
D = depth of track overlap in a slip track connection, 32 mm (1.25 in).
Figure 4-1: Double Track Slip Joint
4-5
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