Relocating my trusty RLC-410 onto a balcony but there are practical considerations which preclude me from securing it to masonry, so the only option is to (somehow) attach it to a 20mm vertical steel bar. Picture appears below.

I'm thinking that u-clamps might be the best option by attaching those around the bar and then to the base, but someone might have tried other solution/s. Any thoughts, anyone?

The post is quite secure and there is room for the camera to one side between the post & the adjacent column.