$\backslash (8-63\backslash ).$ The uniform sign has a weight of $1500$ lb and is supported by the pipe $\backslash ($ A B $\backslash ),$ which has an inner radius of $2\mathrm{.}75$ in $.$ and an outer radius of $3\mathrm{.}00$ in $.$ If the face of the sign is subjected to a uniform wind pressure of $\backslash ($ p$=150\backslash$mathrm$\{$lb$\}/\backslash$mathrm$\{$ft$\}^\{2\}\backslash ),$ determine the state of stress at points $\backslash ($ C $\backslash )$ and $\backslash ($ D $\backslash ).$ Show the results on a differential volume element located at each of these points. Neglect the thickness of the sign, and assume that it is supported along the outside edge of the pipe.

Problem $8-63$