Practice Quiz 5
Note: A one page (one sided) crib sheet is allowed during the quiz,
along with a silent, non-programmable calculator.
Clearly show your work and answer.
A steel section must have a void drilled into it for a special application. A WT 15 x 195.5 cut T
has been bored with a cut-out as shown in the cross section diagram. (The horizontally
symmetrical cross section will consist of solid shape(s) and negative shape(s) of possible basic
shapes shown and a standard steel shape.)
a) Where is the centroid located for the composite section with respect to the origin given?
b) What is the moment of inertia, Ix [or Iy], for the composite section?
c) [some short question from the text material]
Properties for
the standard
steel shape:
Answers:
a) in6x −=
ˆ, iny 16.9
ˆ=
b) Ix = 1634.7 in4, (Iy = 1061.9 in)
WT 15x195.5
A = 57.6 in2
d = 16.6 in
tw = 1.36 in
bf = 15.6 in
tf= 2.44 in
Ix = 1220in4
y= 4.00 in
Iy = 774 in4
possible basic shapes
cross section
x
4.85 in
y
WT 15 x 195.5
O
1.25” φ cut-out
with center at
0.875” below top
2” x 12”
bar
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