12. Refer to figure 6. The 20-mm-diameter bolt fastens two wooden planks together. The nut is tightened until the tensile stress in the bolt is 150 MPa. Find the smallest safe diameter d of the washers if the working bearing stress for wood is 13 MPa. 20 mm a. 70.8 mm b. 75.2 mm c. 86.3 mm d. 80.5 mm e. none of the above FIGURE 6

12. Refer to figure 6. The 20-mm-diameter bolt fastens two wooden planks together. The nut is tightened until the tensile stress in the bolt is 150 MPa. Find the smallest safe diameter d of the washers if the working bearing stress for wood is 13 MPa. 20 mm a. 70.8 mm b. 75.2 mm c. 86.3 mm d. 80.5 mm e. none of the above FIGURE 6

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter5: Beams

Section: Chapter Questions

Problem 5.13.1P

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Question

12. Refer to figure 6. The 20-mm-diameter bolt
fastens two wooden planks together. The nut is
tightened until the tensile stress in the bolt
is 150 MPa. Find the smallest safe diameter d of
the washers if the working bearing stress for
wood is 13 MPa.
= 20 mm
a. 70.8 mm
b. 75.2 mm
c. 86.3 mm
d. 80.5 mm
e.
none of the above
FIGURE 6

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