I'm contemplating a project to build a teeter totter (see saw) base for dog agility, similar to the one in the attached photo (the second photo shows a teeter with the board attached). The chain at the bottom allows for adjustable height, so my plan would be to attach adjustable angle hinge connectors the legs. Instead of the plate shown in this image, I would probably just use pipe straps to connect the plank to the top bar/fulcrum of the teeter. The entire structure would need to support a 12' 2x4 plank and a 40 lb dog. My question is whether or not EMT conduit is strong enough to use for a project like this, and/or if I should consider adding additional bracing for the fulcrum of the teeter.