NOTE: Solutions must include complete sketches and Free-Body Diagrams, and complete equations WITH APPROPIATE SYMBOLS, JUST NUMBERS

WILL NOT BE GRADED. Work must be NEAT, COMPLETE and ORGANIZED ("spaghetti-type" or unreadable work will

NOT be graded). Used methods MUST be of class and textbook; all answers must be fully justified by shown work.

Exercise 1 (50%): A beam has the section shown in the figure, and a shear force V = 2,000 lb is applied as in

the figure. Compute Maximum shear stress AND Shear stress at B (above the line).

You must (in this order):

(i)

(ii)

Sketch GRAPHICAL complete NEAT breakdown of beam section to carry out computations that follow

Compute from (i) the Moment of Inertia I of section (all used symbols/numbers AND RESULTS must

be there, clear and legible; it must match breakdown of above (i))

(iv)

Compute "Q" values of the section for points of maximum shear stress and for point B (above the

line), and determine "t" for each

Compute Maximum Shear stress and the Shear stress at point B (units ARE needed)

4" 6"

ANSWERS:

Maximum shear stress =

Shear stress at B =