These are photographs of a very large crane that was used to install air conditioning equipment at East Leyden High School.
There was a second large crane that was used to assemble the much larger crane. The total amount time required to install the equipment was three days.
The first day was used to assemble the lift crane. The second day was for the lifting of the equipment and the third day was needed to disassemble the lift crane.
Link to STEVENSON CRANE COMPANY