Plank dimension = 300 mm x 75 mm thick Plank allowable stresses: Bending = 10.4 MPa Shear = 0.8 MPa Unit weight of soil = 17.3 kN/m3 Active earth pressure coefficient, k,= 1/3 43. Which of the following gives the maximum flexural stress? а. 10.8 МРа b. 12.8 MPа 44. Find the maximum shear stress. а. 60 mm b. 70 mm 45. What should be the thickness (mm) of the planks to prevent failure? a. 0.17 MPa b. 0.29 MPа с. 14.2 МPа d. 16.7 MPa c. 80 mm d. 90 mm с. 0.33 МРа d. 0.41 MPa

Plank dimension = 300 mm x 75 mm thick Plank allowable stresses: Bending = 10.4 MPa Shear = 0.8 MPa Unit weight of soil = 17.3 kN/m3 Active earth pressure coefficient, k,= 1/3 43. Which of the following gives the maximum flexural stress? а. 10.8 МРа b. 12.8 MPа 44. Find the maximum shear stress. а. 60 mm b. 70 mm 45. What should be the thickness (mm) of the planks to prevent failure? a. 0.17 MPa b. 0.29 MPа с. 14.2 МPа d. 16.7 MPa c. 80 mm d. 90 mm с. 0.33 МРа d. 0.41 MPa

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter12: Lateral Earth Pressure

Section: Chapter Questions

Problem 12.12P

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