3. A beam of T cross-section is formed by joining together two boards having dimensions shown in the figure. The total shear force acting on the cross-section is V = 1500 N. a. Determine the maximum shear stress on the neutral axis of the cross-sections. b. If the two boards are to be glued, what is the required shear strength of the glue. c. If nails are to be used instead of glue, determine the required spacing, s. Let allowable load in shear for each nail be Fs. 240 mm 60 mm 200 mm 60 mm

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