You have received some good advice and procedures for raising the ladder. Safety always first- secure the heel of the ladder and use your legs, instead of your back, when lifting. If you can't get four points of contact, two at top and two at bottom, take the two at the bottom. I know common sense. After the ladder is extended and lowered to the building make sure you have approx. 75 degree climbing angle. This can be accomplhish by placing your feet at the heel of the laddder, just touching your toes to the heel(beams). Standing straight, extend your arms to 90 degree angle as to grab a rung of the ladder. This will get you close to a 75 degree cimbing angle. One last thing... always secure yourself when working off the ladder. Stephen Rogers S&R Home Inspections Retired Montgomery, AL. District Fire Chief