Treehouse bridge update: one section blew down in the California storms

[Danny D.]

The third section blew down in the California storms.
https://c4.staticflickr.com/8/7511/15967079450_5c6a237edc_c.jpg

It was just the frame, and a few deck timbers:
https://c4.staticflickr.com/8/7478/15967080150_47ec573ed9_c.jpg

Apparently the mistake was to attach it here to the redwood:
https://c4.staticflickr.com/8/7515/16128603346_f83135617f_c.jpg

These two smaller redwoods apparently bowed to the sides:
https://c4.staticflickr.com/8/7541/15967079880_5727bc211f_c.jpg

We had only the far end attached to the steel cable:
https://c1.staticflickr.com/9/8658/15534653603_ff9ac90178_c.jpg

So, we think the mistake was to trust the redwoods and not attach
the close end to the overhead steel cable, and also that we had
attached the far ends to the cable temporarily with just rope,
which broke when the redwoods splayed out in the winds.

What we think happened was:
1. The redwoods splayed outward, pulling the boards out.
2. The close end fell downward putting pressure on the far end.
3. The rope on the right side of the far end broke under stress
tumbling the boards to the steep hillside below:
https://c4.staticflickr.com/8/7478/15967080150_47ec573ed9_c.jpg

We still can't get the dog out onto the bridge yet, though:
https://c4.staticflickr.com/8/7536/15968633967_b05aedd4e3_b.jpg

:)

[G. Ross]

Danny D. wrote: > The third section blew down in the California storms. > https://c4.staticflickr.com/8/7511/15967079450_5c6a237edc_c.jpg > It was just the frame, and a few deck timbers: > https://c4.staticflickr.com/8/7478/15967080150_47ec573ed9_c.jpg > Apparently the mistake was to attach it here to the redwood: > https://c4.staticflickr.com/8/7515/16128603346_f83135617f_c.jpg > These two smaller redwoods apparently bowed to the sides: > https://c4.staticflickr.com/8/7541/15967079880_5727bc211f_c.jpg > We had only the far end attached to the steel cable: > https://c1.staticflickr.com/9/8658/15534653603_ff9ac90178_c.jpg > So, we think the mistake was to trust the redwoods and not attach > the close end to the overhead steel cable, and also that we had > attached the far ends to the cable temporarily with just rope, > which broke when the redwoods splayed out in the winds. > What we think happened was: > 1. The redwoods splayed outward, pulling the boards out. > 2. The close end fell downward putting pressure on the far end. > 3. The rope on the right side of the far end broke under stress > tumbling the boards to the steep hillside below: > https://c4.staticflickr.com/8/7478/15967080150_47ec573ed9_c.jpg > We still can't get the dog out onto the bridge yet, though: > https://c4.staticflickr.com/8/7536/15968633967_b05aedd4e3_b.jpg > :) It's hard to build in flexibility. GW Ross 'Criminal Lawyer', a redundancy

[Zak W]

"Danny D." <dannyd...@gmail.com> wrote in news:m80faq$358$1@dont-
email.me:

> Apparently the mistake was to attach it here to the redwood:
> https://c4.staticflickr.com/8/7515/16128603346_f83135617f_c.jpg
>

No, the mistake was that you didn't listen to the good advice given here
last month.

[woodchucker]

Your mistake was using multiple trees. Had you made the tree house using
one it would survive, putting it between trees that naturally sway is
well, disregarding that fact. Poor design.

--
Jeff

[woodchucker]

Or putting it between ground and a tree static and swaying also wrong.
There's no way for this to survive.

Any storm with potential to sway the tree will rip it apart.

--
Jeff

[John Larkin]

The winds were vicious yeaterday. Driving back to SF, somewhere around
Vallejo, a huge multi-trunk tree blew onto I80 and blocked traffic for
miles. Westbound, traffic was blocked by the trees, and eastbound, it
was blocked by idiots.

http://www.sfgate.com/bayarea/article/Fierce-Bay-Area-winds-causing-power-outages-BART-5985826.php


Here's The Brat, the kid what does our PCB layouts.

https://dl.dropboxusercontent.com/u/53724080/Truckee/TheBrat.jpg

The wind chill up there was in single digits up there on Monday, and
predicted -20F in places on Tuesday night. They can get 100 MPH gusts
up there on the peaks. Sunny California.


--

John Larkin Highland Technology, Inc
picosecond timing laser drivers and controllers

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

[-MIKE-]

On 12/31/14 3:23 AM, Danny D. wrote:
>
> We still can't get the dog out onto the bridge yet, though:
> https://c4.staticflickr.com/8/7536/15968633967_b05aedd4e3_b.jpg
>
> :)
>

I think the canine is the smarter of the species in this case. :-D


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com
mi...@mikedrumsDOT.com
---remove "DOT" ^^^^ to reply

[Oren]

On Wed, 31 Dec 2014 09:23:38 +0000 (UTC), "Danny D."
<dannyd...@gmail.com> wrote:

>We still can't get the dog out onto the bridge yet, though:
> https://c4.staticflickr.com/8/7536/15968633967_b05aedd4e3_b.jpg

Listen to his whispers :)

[dpb]

On 12/31/2014 3:23 AM, Danny D. wrote:
> The third section blew down in the California storms.
> https://c4.staticflickr.com/8/7511/15967079450_5c6a237edc_c.jpg
>

...

Not surprised; such were what we had been trying to convince your buddy
of for weeks that hadn't thought this thing thru adequately...

I'd expect more of the same with time; I'd doubt the last week's weather
was anything greatly out of the norm of what can be expected with time.

--

[Maynard A. Philbrook Jr.]

In article <zNKdnTlAYpUilDnJ...@ptd.net>, nos...@nospam.com
says...

> > tumbling the boards to the steep hillside below:
> > https://c4.staticflickr.com/8/7478/15967080150_47ec573ed9_c.jpg
> >
> > We still can't get the dog out onto the bridge yet, though:
> > https://c4.staticflickr.com/8/7536/15968633967_b05aedd4e3_b.jpg
> >
> > :)
> >
>
> Your mistake was using multiple trees. Had you made the tree house using
> one it would survive, putting it between trees that naturally sway is
> well, disregarding that fact. Poor design.
>
> --
> Jeff
>
>

I think the dog is smarter !

Jamie