I need some ideas
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Joined: Feb 2003
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From: Idaho
I need some ideas
I have added on to my garage and in doing so, I had some trusses made that have a pocket in them that will allow me to suck my truck topper (see photos in my gallery) up into the ceiling. I am going to mount an electric hoist on top of the pocket that will lift the topper up but I am struggling to design a device that I can attach to the topper and I can clip the hoist to. I want the device to be designed so that when I lift the topper up, it won't spread the edges of the topper out. Am I making any sense?? If pictures of the trusses would help, let me know. Thanks in advance.
Craig
Craig
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From: Fayetteville, NC
Years ago, my dad and I used 2-2x4's with an eye bolt in one end and three pulleys in the other ends. Mounted pulleys in the ceiling joists also. Connected a cable at the eyebolt, ran it continuously through the pulleys and terminated it on a crank similar to what you'd pull a boat onto a trailer with. Worked great.
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Are you certain he didn't have the eye bolt in the ceiling and 4 pulleys on the 2x4's? You need to keep an even pull...
With the 4 pulleys on the 2x4's your mechanical advantage would be 8, 50 pounds of pull would lift 400 pounds. The winch would give you an extra mechanical advantage. If the winch was 10:1 you would need 5 pounds of pull to lift 400 pounds. Winches do not keep a constant mechanical advantage due to the cable building up on the spool tho.
With an 8x pulley system you would need to pull 40 feet of cable to lift the topper 5 feet.
With the 4 pulleys on the 2x4's your mechanical advantage would be 8, 50 pounds of pull would lift 400 pounds. The winch would give you an extra mechanical advantage. If the winch was 10:1 you would need 5 pounds of pull to lift 400 pounds. Winches do not keep a constant mechanical advantage due to the cable building up on the spool tho.
With an 8x pulley system you would need to pull 40 feet of cable to lift the topper 5 feet.
Senior User
Joined: Jun 2000
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From: Fayetteville, NC
Eric,
You lost me at "mechanical advantage"
I was 7 and just remember hating to crack that thing up because it weighed a ton. Thumper's at least got an idea that maybe he can work with.
Bert
You lost me at "mechanical advantage"
I was 7 and just remember hating to crack that thing up because it weighed a ton. Thumper's at least got an idea that maybe he can work with.Bert
Senior User
Joined: Jun 2000
Posts: 134
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From: Fayetteville, NC
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From: Idaho
The electric hoist I have will lift 800 lbs (according to manufacturer anyway) and I am guessing the topper shouldn't way more than 400 lbs. I thought about the 2x4 idea with the eye bolts on each end. The problem is I have one hook on the end of the cable attached to the hoist. What do I use to span out to hook on to 4 points (the 4 eye bolts)? Maybe a strong piece of steel (boxed tubing or something of that nature) that would run the length of the topper and then cables at each end looped over it (secured to prevent sliding) and each end would be attached to the eye bolts? Thanks for your ideas.
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