There are three classes of levers, depending on the relative positions of the effort is applied, load, and fulcrum. 1  First-class levers have the fulcrum located between the load and the effort (LFE). If the two arms of the lever are of equal length, the effort must be equal to the load.
1 Ebro: From the 120 Foot level of the new cell tower, This is Ebro.
Towering 137 feet into the sky, the CR 137 is North Americaâs tallest aerial ladder. Fire and emergency vehicle manufacturer, E-ONE, Inc., is introducing this new aerial ladder at the 2010 Fire Rescue International conference in Chicago on Friday.