Wow this is fun! ... enjoyed them both... When me and the Mrs were on our long way home from AK... through the west ...especially Montana we saw those structures and was how in heavens do they work? ...Well that learned me up!... I love simple mechanics and physics... people using their smarts to ...how do I do this?... and then there she am.... I recently had a catastrophic collapse of my floor in the wood shop due to flooding... I have many tons of planers, jointers, lathe, table saws...bench.... it was a long list and thanks to the front loader hydraulics all that could be lifted out... Then I decided the wood stove needed to be relocated in the new shop floor plan and it would require a new metal-bestos chimney... My father-n-law from KY was a steel worker and had to move all sorts of insanely heavy furnace parts ...when I built my barn he had a solution for putting up 16ft long 10x 12" beams at 14 ft up....and I have used that solution in a number of other projects... we built a boom off the front loader ...chained through the frame... man that made work fun.,
Here is a shot just lifting a stack in place... his beam work was more poetry ...