Probably a massive hot tub or a pool insert. Or they could of been craning over the bundles of material to build a poll
barn or a house module.

My dad sub divided his property and put a mfg home on the back side of his 5,000 Sq foot shop so his baby brother could live out his retirement dream of having his own shop. They had to bring in a large crane like this and crane it over the top of the two and half story shop roof in sections.

You see, I get my giving nature honestly. I learned from the hand of the master what family really means.

Don't make me have'ta Troll ya Bro!