210mm 180mm 12mm 9mm 180mm 210mm 238 mm 90mm wwe
A built-up beam made from fastening two channels to a wide flange section carries
loads` as shown. The fasteners are 12mm∅ bolts with allowable shear stress τ= 110 MPa. For
bearing, σb= 220MPa for single shear, and σb= 275 MPa for double shear. E=200 GPA. Fy=420
MPa. Do not round off between solutions . Explain the Steps.
a.) Determine the Moment of Inertia of the Section
b.) Determine the Moment Capacity of the section if fb≤280MPa.
c.) Determine the flexural stress at fiber 30 mm above Neutral Axis at distance 5 meters
from the support at A.
d.) Determine the maximum bending stress on the section.
e.) Determine the maximum shearing stress at Neutral Axis.
f.) Determine the horizontal shearing stress at 20 mm above the Neutral Axis.
g.) Determine the horizontal shearing stress at 95 mm above the Neutral Axis.
h.) Determine the spacing of the bolts.
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