Page 1 of 5 123 ... LastLast
Results 1 to 10 of 49
  1. #1
    New Member
    Join Date
    Jun 2010
    Location
    LA, CA
    Posts
    20

    Force calculation for a unusual hang

    So in an effort to be innovative, I am trying to solve my unique problems as a (new) hanger. My rig is for Jeep trips where no convenient anchor points are available... or only one anchor (spike) point being the Jeep if I want to render the Jeep immobile while my DN is set up.

    Here is my best shot at solving this problem to date:


    The only real problem is the spikes. Using any stakes I currently have=failure.

    I have found some companies on the Internet that make products that might work, but I need some idea of force exerted on the spike.

    I set off to try and do the math, but cannot figure it out.
    I searched hf and can't extrapolate from other threads.
    Don't have/can't borrow a scale to measure.
    I know the bipod bears weight, but I am not sure if it relieves any load from the amsteel.

    Thinking the forum might enjoy a little puzzle, I decided to post. I hope this puzzle makes for a decent conversation and possibly an answer.

    So the question is: Any idea what force is exerted on the spike from the rope??


    *****
    btw, I do plan on a more traditional hang when possible. I have invested in whoopies and tree straps from hf vendors... great website and nice people here!!

  2. #2
    gargoyle's Avatar
    Join Date
    May 2009
    Location
    Middleville, Mi
    Hammock
    G-Bird II
    Tarp
    Ogee tarp
    Insulation
    AHE TQ DIY Down UQ
    Suspension
    whoop dutch!
    Posts
    6,091
    Images
    46
    Spreader bar. Two five foot long sectoins of fencerail. Eliminate the foces, or greatly control them at least.
    Ambulo tua ambulo.

  3. #3
    Member colonel r's Avatar
    Join Date
    Dec 2010
    Location
    Knoxvillle, TN
    Hammock
    Hennessy Ultralight, modified
    Tarp
    HMG Hex Tarp
    Insulation
    Zpacks down 40 deg
    Suspension
    Dynaglide UCR
    Posts
    85
    Without calculating the force, you can use the auger type anchors used for staking out dogs. Walmart for about $6 each. I have used them in similar circumstances and you cannot pull them out without unscrewing them from the ground. These are the type anchors utilities use to anchor guy wires for poles.

  4. #4
    Gumbo's Avatar
    Join Date
    Apr 2010
    Location
    Orlando, Fl
    Hammock
    Chrysalis
    Tarp
    Old4Hats Hilton
    Insulation
    DIY
    Suspension
    Whoopies
    Posts
    1,027
    Images
    10
    What kind of jeep is it? Luggage rack or roll bar? I have a Liberty and have been thinking about different ways to hang two hammocks from one without use of ground stakes. I'm still testing, but if I come up with something workable, I'll let you know.

  5. #5
    Senior Member Mike_O's Avatar
    Join Date
    Oct 2010
    Location
    Coastal, NC
    Posts
    103
    Images
    16
    James, you can use rebar in a long length or something like this that I got from home depot.




    Do a search and you will find that a couple of people are experimenting with ground anchors.

  6. #6
    Senior Member perdidochas's Avatar
    Join Date
    Oct 2010
    Location
    pensacola, FL
    Hammock
    DIY tablecloth struc. ridgeline
    Tarp
    Guide Gear 12x12
    Insulation
    Blue WM pad
    Suspension
    Dutch Cinch buckle
    Posts
    246
    Quote Originally Posted by colonel r View Post
    Without calculating the force, you can use the auger type anchors used for staking out dogs. Walmart for about $6 each. I have used them in similar circumstances and you cannot pull them out without unscrewing them from the ground. These are the type anchors utilities use to anchor guy wires for poles.
    Depends on the type of ground. In Florida sandy soil, the dog stakes do come out.

  7. #7
    Senior Member XexorZ's Avatar
    Join Date
    Sep 2009
    Location
    Norther Idaho
    Hammock
    WBBB 1.7 DL
    Tarp
    Mosq. Camo Dimond
    Insulation
    US GI MSS
    Suspension
    WBBB Stock webbing
    Posts
    700
    Images
    8

    Buy Tea at Jennifer's Tea Garden ( My Wife's Place )

  8. #8
    New Member
    Join Date
    Jun 2010
    Location
    LA, CA
    Posts
    20
    Quote Originally Posted by Gumbo View Post
    What kind of jeep is it? Luggage rack or roll bar? I have a Liberty and have been thinking about different ways to hang two hammocks from one without use of ground stakes. I'm still testing, but if I come up with something workable, I'll let you know.
    Its a 2008 Jeep Wrangler softop with front and rear recovery points and steel bumpers. (3" lift, 35" tires, rockcrawler)



    Let's start a thread and discuss... conversation often yields ideas. I have a few decent ideas if you are willing to attach fixtures to the vehicle...

  9. #9
    New Member
    Join Date
    Jun 2010
    Location
    LA, CA
    Posts
    20
    Quote Originally Posted by colonel r View Post
    Without calculating the force, you can use the auger type anchors used for staking out dogs. Walmart for about $6 each. I have used them in similar circumstances and you cannot pull them out without unscrewing them from the ground. These are the type anchors utilities use to anchor guy wires for poles.
    That is one of the types I am looking at, but a shaped steel wire will not have enough surface area to hold in loose ground or sand I think.

    How hard was the ground you used this method in??

  10. #10
    WV's Avatar
    Join Date
    Feb 2008
    Location
    southeast WV
    Hammock
    DIY
    Posts
    3,689
    Images
    204
    Quote Originally Posted by colonel r View Post
    Without calculating the force, you can use the auger type anchors used for staking out dogs. Walmart for about $6 each. I have used them in similar circumstances and you cannot pull them out without unscrewing them from the ground. These are the type anchors utilities use to anchor guy wires for poles.
    Screwing one of these WM anchors into clay, I twisted it in half. If you have good soil and can get it in without needing to exert too much rotational force, they work well, but be warned that the metal they're made of isn't all that strong.

    Try the ridgepole idea.

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •