Unformatted text preview: 7.21 A builder wishes to use a 5 m beam to span between two support walls
which must support the loads given- The building code states that
the maximum bending moment for a beam of this construction (crow
section and material) is 13 kN-m. Compute the reaction forces, shear
and moment functions and plot these shear and moment functions.
Does the beam satisfy the code? 10kN 5kN FIGURE P721
A 2 2 1 3
FIGURE S7 .2121
21+}, = : A1,+By—10-—5=0,ZMA = 0: —20—20+5B-,, = 0
.33, = 8 kN
A? = 7 kN.
From b: 2Fy=0: 7—V=0 704 ...
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- Summer '08