1. The problem statement, all variables and given/known data Question 3: The beam is supported by a pin at A and a short link BC, as shown in Figure 3.0. Determine the maximum magnitude P of the loads the beam will support if the average shear stress in each pin is not to exceed 80 MPa. The diameter for each of the pins is 18 mm. http://img13.imageshack.us/img13/7517/chibusq3.jpg [Broken] 2. Relevant equations 3. The attempt at a solution http://img5.imageshack.us/img5/1824/chibus1.jpg [Broken] http://img13.imageshack.us/img13/9589/chibus2.jpg [Broken] I just wanted to get an idea if i'm way off. Really I don't know how to proceed past finding the required shear force in the pins to shear them. PS: Sorry for my horrible english and writing skills.