Example $3$:

A $5-$m$-$long simply supported timber beam carries

two concentrated loads as shown.

a$)$ At section $a-a,$ determine the magnitude of

the shear stress at point $H.$

b$)$ At section $a-a,$ determine the magnitude of

the shear stress at point $K.$

c$)$ Determine the maximum horizontal shear

stress that occurs in the beam at any $V_{\text{m}\text{a}\text{x}}$

location within its $5-m$ span.

d$)$ Determine the maximum compression

bending stress that occurs at any location

within the beam's $5-$m span.

$=-\frac{m*y}{\text{I}}$ distonce