Staircase for a cabin
- Thread starter royce
- Start date
lonewolf55
Member
- Joined
- May 30, 2010
- Messages
- 12
Years ago we did something similar with a wooden library ladder. Ended up attaching a 3/4" pipe to the side of the ladder and attaching the rope to a small wheel/ pulley. It rode up the pipe as the stairs came down, reducing the leverage on the ladder. Worked a treat. We used an old spittoon that we added weight to get the ladder to stay tight to the roof.
Marctrees
Well-known member
Marctrees
Well-known member
I think your stairs look great, but am concerned about dogs, cats, other rug rats, and toes.
Maybe somekinda safety or redundant something for the last foot or so going down.
I dunno, but that's more than enough weight to do serious irreversible damage.
Just somekinda belt and suspenders failsafe setup.
Marc
Maybe somekinda safety or redundant something for the last foot or so going down.
I dunno, but that's more than enough weight to do serious irreversible damage.
Just somekinda belt and suspenders failsafe setup.
Marc
Marctrees
Well-known member
Duhhh.... I just looked back and saw your drawing in Post 20.
Interesting idea... and space between the weight "piston" and the bore ID of the pipe...
Thinking if there was an easy way to adjust that space one could regulate how slow it goes down.
Imagine if that space was only like 1/8" or less, and if the pipe was filled with a viscous oil, it would go down pretty slow.
And to go up, to not fight the vacuum of the oil, a one way air entry valve could be put in the spring area.
Air would bubble up out of oil when steps are up.
Interesting possibilities.
Mineral oil ?, PVC inert long term ?
Marc
Interesting idea... and space between the weight "piston" and the bore ID of the pipe...
Thinking if there was an easy way to adjust that space one could regulate how slow it goes down.
Imagine if that space was only like 1/8" or less, and if the pipe was filled with a viscous oil, it would go down pretty slow.
And to go up, to not fight the vacuum of the oil, a one way air entry valve could be put in the spring area.
Air would bubble up out of oil when steps are up.
Interesting possibilities.
Mineral oil ?, PVC inert long term ?
Marc
Talked to the owner yesterday and he has got the geometry and counterweight right.
But, there is an issue with picking the stairs from one side.
In the down position, there is a 3/4" gap between the stairs and the floor, on the hoist side.
So then, I went ahead and built a bridle out of some perforated angle and some side rails off some truck chains.
This should cure the twisting and reduce the friction from it.
Good news is that he has only temporarily mounted the block and it will be easy to reposition it
Royce
But, there is an issue with picking the stairs from one side.
In the down position, there is a 3/4" gap between the stairs and the floor, on the hoist side.
So then, I went ahead and built a bridle out of some perforated angle and some side rails off some truck chains.
This should cure the twisting and reduce the friction from it.
Good news is that he has only temporarily mounted the block and it will be easy to reposition it
Royce
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Graham08
Well-known member
Looking good!