A sign is supported by a pole of hollow circular cross section, as shown in the figure. A sign is supported by a pole of hollow circular cross section, as shown in the figure.

convention. Enter your answers in psi.$)$

convention for shear stresses.$)$

${}_x=$

${}_y=$longrightarrow$$

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$y$

roundoff error. psi

$($b$)$ Determine the maximum tensile, compressive, and shear stresses at point $A.($For the shear stress, enter the magnitude.$)$

${}_1=7256\mathrm{.}113$

${}_2$ psi

Your response differs from the correct answer by more than $10\%.$ Double check your calculations. psi

${}_{\text{m}\text{a}\text{x}}=,$

A cylindrical pole of height $42$ ft is oriented vertically with its base on the ground at point A$.$ The pole's cross section, labeled Section X$$X$,$ has an outer diameter of $10\mathrm{.}5$ in$.$ and an inner diameter of $8\mathrm{.}5$ in$.$ A rectangular sign of height $3$ ft and width $8$ ft is attached at its left edge to the pole, where the top of the sign is at the same height as the top of the pole.

The outer and inner diameters of the pole are $10\mathrm{.}5$ in$.$ and $8\mathrm{.}5$ in$.,$ respectively. The pole is $42$ ft high and weighs $3\mathrm{.}7$ kips. The sign has dimensions $8$ ft $3$ ft and weighs $400$ lb$.$ Note that its center of gravity is $53\mathrm{.}25$ in$.$ from the axis of the pole. The wind pressure against the sign is

$41$ lb$/$ft$2.$

$($Assume that the structure behaves linearly elastically and that the stresses caused by two or more loads may be superimposed to obtain the resultant stresses acting at a point. Consider both in$-$plane and out$-$of$-$plane shear stresses unless otherwise specified. Assume that the $+$x$-$axis is to the right and the $+$y$-$axis is up along the page. For the normal stresses, use the deformation sign convention. Enter your answers in psi