For Problems $821$ through $830,$ assume that the indicated shape is the cross section of a beam made from wood having an allowable shearing stress of $70$ psi, which is that of Grade No$.2$ southern pine listed in Appendix A$15.$ Compute the maximum allowable shearing force for each shape. Use the general shear formula.

$825.$ Use a standard $1012$ wooden beam with the long dimension vertical.

$826.$ Use a standard $1012$ wooden beam with the long dimension horizontal.