In Prob. 3.55, determine the perpendicular distance between member EF and edge AD of the walkway. Problem 3.55: The 2.4-m-wide portion ABCD of an inclined, cantilevered walkway is partially supported by members EF and GH. Knowing that the compressive force exerted by member EF on the walkway at F is 24.3 kN determine the moment of that force about edge AD of the walkway.