Walk up wall=
Extend on ground, put butt up to BASE of the building wall. Lift pole up near brush end and start to walk towards the butt end liftting the pole as you go untill it's up against the wall it wass butted up to.
To be honest, these poles arn't up to the job, way too heavy, thick & bendy, can verge on being dangerous IMO.
Modular's are a doddle & are the only realistic option for 40ft+ IMO.