CEMP-E
TI 809-07
NOVEMBER 1998
Where:
L = the span of the steel studs in m (ft).
The allowable moment in steel stud with a 1/3 increase is stress for wind, M , is:
a
1.33Fy S x
1.33(228MPa)(17,649mm3 )
3,198.N m...(2,359ft lb) (Eq 4-15)
Ma
1.67(C5)
f
Where:
the required factor of safety for bending ad given in the AISI specification,
f
C5 = constant =1,000,000 metric, (12 English).
(Eq 4-16)
Ma
3,198.N m..(2,359ft lbs).. ..Ms 911.N m..(672ft lbs)
(4) Check stud deflection: The deflection, , in the steel stud due to the wind
load is:
5wL4 C6
D=
(Eq 4-17)
384E sIx
5( 544 .N / m )( 3 .66 .m ) 4 (10 9 )
(Eq 4-18)
4 .8 .mm ...( 0 .189 in )
384 ( 200 ,000 MPa )(1,318 ,204 .mm 4 )
Where:
9
C6 = constant = 10 metric, (1728 English)
The allowable deflection in the steel stud, is given by:
L
3.66.m(C7)
6.1.mm...(0.240in)
(Eq 4-19)
600
600
4.8.mm ...( 0.189 in )
6.1.mm ...( 0.240 in )
OK
(Eq 4-20)
d. Summary:
(1) A 152 mm (6 "), 1.438 mm (0.0566 ") thick steel stud with a 41 mm (1-5/8 ")
flange and a 15 mm (0.6 ") return, spaced at 406 mm (16 ") centers is satisfactory.
(2) Use a 4.8 mm (3/16 ") diameter wire anchor spaced on 406 mm (16 ")
centers vertically and horizontally.
4-9
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