[TowerTalk] Tower/Ladder Safety Case study

[Pat Barthelow]

TT:

A group of hams has to develop (to Have Developed)  a safety system, and 
procedure to make safe an access ladder to the surface of a large steerable 
dish, shown below. All activity at the dish is by volunteers.    The final 
20 ft to the surface access hatch,  is via a ladder high in the dish 
superstructure, and approximately 60 above ground.   The existing ladder has 
the beginnings of a surround tube around the climber of the ladder.  Ladder 
climbers will wear full body harnesses with shock absorbing lanyards, if 
that is the design that is developed.  We are seeking disussion about the 
design of a safe system for ladder climbing, that includes procedures for 
recovering to safe ground a person whose safety system has caught the fall, 
but the person is suspended out of easy reach..  Discussion invited.....

Some good pictures of the ladder in question:   Thanks to Thor, N6FNP for 
pictures...
The Dish:
http://www.longandflatsociety.com/Galleries/JamesburgEarthStation/tabid/466/Default.aspx
At bottom of ladder:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4126s_rasmussen.jpg
Ladder Bottom:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4110s_rasmussen.jpg
At ladder Bottom:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4113s_rasmussen.jpg
Climbing onto dish:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4096s_rasmussen.jpg
In the hatch:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4100s_rasmussen.jpg
At the hatch:
http://www.longandflatsociety.com/Portals/8/Gallery/910/IMG_4111s_rasmussen.jpg

73, DX, de Pat AA6EG aa6eg at hotmail.com;
Skype: Sparky599