help building jib crane hoyst

hello, sorry if you are bothered, for a garage placed heavy machinery maintenance we wanted to set up and install a jib crane with swivel arm, height measures under hook 3 meters, jib boom length 3 meters reach 500 kg, you would have some advice, how to make the hinge rotation? we can anchor it in reinforced concrete column size 55x 55 cm without installing support column, what do you recommend, thank you for your precious time and your cooperation View attachment 177488 ...

help building jib crane hoyst

help building jib crane hoyst