A glued$-$laminated $($glulam$)$ timber beam is made from five $33$ mm $\backslash$times $180$ mm $($finish dimensions$)$ boards as shown in the figure below.

The strength of the wood in horizontal shear is $\backslash$tau allow $=557\mathrm{.}93$ kPa $($which considers a factor of safety$).$

What is the required shear strength of the glue joints $($MPa$)$ considering a factor of safety against failure of the glue joints of FS $=2\mathrm{.}68?$ Neglect the thickness of the glue joint.