Re: [hexayurt] Load rating for yurt halo rope?

[Steve Upstill]

Are you sure you want the halo to run through your rebar? I'd worry about it slipping off the roof entirely. Seems to me that you're better off with a shorter halo, running lines from the rebar to reach it. I don't know, I'm speculating, but I'm interested in the answer because I'm using a halo for the first time this year.

Also, 95-lb. rope seems pretty light to me. Anyone else?

Cheers,

Steve Upstill

--

You can't imagine how embarassing it is to not outlive Keith Richards.

-- Jeff Mock, RIP

On Aug 20, 2012, at 7:06 PM, Robert Atkins <snikta...@gmail.com> wrote:

Hi all,

What kind of load rating am I looking for in rope to use to make a yurt halo out of? Is 95lb enough?

Also, can someone check my math: I've calculated that to tie down a 6' stretch yurt I'll need 80' of rope.

[A foot up the roof from the wall the trapezoid panels are 7' across and the triangular panels are 3'; if the tie-downs are at a 45 degree angle from the roof to my rebar I need 1' laying across the roof and 5.6' from the roof edge to the ground; call it 8' to give me some slack to tie knots and a trucker's hitch. So in total (2 x 7') + (4 x 3') + (6 x 9') = 80']

Similarly, for a regular H12, I'll need 96'.

[2' up the roof from the wall the triangles are 6' across; therefore I need to use 10' lengths from the halo to the ground: (6 x 6') + (6 x 10') = 96'.]

Is that about right?

Cheers, Robert.

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[Robert Atkins]

On Tuesday, August 21, 2012 9:06:30 AM UTC-7, Steve Upstill (Swifty) wrote:
> Are you sure you want the halo to run through your rebar?

Eh? I'm not running the halo through the rebar; the "tie downs" I refer to above run from the halo itself (which sits wholly on the roof a foot or two above the wall line) to the rebar.

95lb rope seems light to me too, that's why I'm asking.

Cheers, Robert.

[Steve Upstill]

My cocktail party structural analysis is that an angular force on the rope multiples the force. That is if you have a tight rope with a certain weight in the middle, the actual tension on the rope is a high multiple of the weight (it takes much more resistance in the horizontal direction to resist sagging.) So you actually want the halo to bend quite a bit where the guys attach.

It's pretty easy to come by ropes of ~250 pounds at Home Depot. I even found one rated around 400. The peace of mind is worth $14/yurt to me. (I'm figuring 50' for the halo; I'm using ratcheting tiedowns for guying.)

Cheers,
Steve
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Abstainer: a weak person who yields to the temptation of denying himself a pleasure.
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