Help Advice Construction Swivel Arm Jib Crane Hoist

[forgiaro]

on the net I found these handcrafted photos, clearly not bolted the rotating boom directly to the reinforced concrete pillar but I will put a column in H-shaped steel beam to it, what do you think? would you have photos or drawings? clearly not heavy loads maximum two hundred kilograms, I realize that it is a cantilevered shelf very urgent and that I have to counter it with the diagonal type tie rods, other ideas and suggestions? thanks again for your precious time and valuable advice