I will say this about ladders factory installed.
Now Mine,, When I decided to replace it I simply reached out with one hand and ripped it off the RV. No screwdriver, I just pulled it off WITH ONE HAND.. Ok, I'm big, I'm Strong, but nto that strong.
The replacement is "Detachable" in fact it is a convertable (Step/Extension) ladder. In Step mode it is perfect for wash & wax and in Extension it is just exactly the right length to get on the roof. and being a "Pitched" ladder (Not straight up and down) easier to climb and mount/dismount at the top
(Oh the proper pitch.. Put your toes against the foot of the ladder. Stand straight, Reach out with you hands, arm fully extended, and grab a rung. if your finger tips hit, too flat, your wrist, too steep, a nice comfortable grip. just right. Yes, you are the angle set)
The "J" hooks that hold the ladder are lagged into soild wood with quarter inch lag bolts. Two each.
To test 'em I hooked a roap over 'em , formed a sturip at the bottom put my foot in the struip and "Bounced" it held my 300 plus no problem BOUNCING..
That's the difference between a screw in fiberglass and one in good, solid, wood.