[TowerTalk] "Chicken Ladder" for Roof Climbing?

[Eric Rosenberg]

As I get older, climbing on my 30 degree pitch roof gets scarier and 
scarier.

Does anyone have experience using a "chicken ladder" on their roof? My 
only experience was in Dublin (EI), where we used similar devices on 
slate roofs at Trinity College (for fear of dislodging slate tiles and 
then sliding off or going through the roof).

For visual reference, go to:

http://www.acrobuildingsystems.com/files/Downloads/ACRO%2011600%20Specs.pdf
http://www.acrobuildingsystems.com/files/Downloads/ACRO%2011600%20Install%20Instructions.pdf

Acro's other products might come in handy for those of us with 
roof-mounted towers.

73,
Eric W3DQ
Washington, DC