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#1
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the Californiastorms
The third section blew down in the California storms.
https://c4.staticflickr.com/8/7511/1...6a237edc_c.jpg It was just the frame, and a few deck timbers: https://c4.staticflickr.com/8/7478/1...ec573ed9_c.jpg Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg These two smaller redwoods apparently bowed to the sides: https://c4.staticflickr.com/8/7541/1...27bc211f_c.jpg We had only the far end attached to the steel cable: https://c1.staticflickr.com/9/8658/1...9ac90178_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/8/7478/1...ec573ed9_c.jpg We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_b.jpg  |
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#2
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the Californiastorms
Danny D. wrote:
The third section blew down in the California storms. https://c4.staticflickr.com/8/7511/1...6a237edc_c.jpg It was just the frame, and a few deck timbers: https://c4.staticflickr.com/8/7478/1...ec573ed9_c.jpg Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg These two smaller redwoods apparently bowed to the sides: https://c4.staticflickr.com/8/7541/1...27bc211f_c.jpg We had only the far end attached to the steel cable: https://c1.staticflickr.com/9/8658/1...9ac90178_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/8/7478/1...ec573ed9_c.jpg We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_b.jpg It's hard to build in flexibility. -- GW Ross 'Criminal Lawyer', a redundancy |
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#3
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the California storms
"Danny D." wrote in news:m80faq$358$1@dont-
email.me: Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg No, the mistake was that you didn't listen to the good advice given here last month. |
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#4
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the Californiastorms
On 12/31/2014 4:23 AM, Danny D. wrote:
The third section blew down in the California storms. https://c4.staticflickr.com/8/7511/1...6a237edc_c.jpg It was just the frame, and a few deck timbers: https://c4.staticflickr.com/8/7478/1...ec573ed9_c.jpg Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg These two smaller redwoods apparently bowed to the sides: https://c4.staticflickr.com/8/7541/1...27bc211f_c.jpg We had only the far end attached to the steel cable: https://c1.staticflickr.com/9/8658/1...9ac90178_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/8/7478/1...ec573ed9_c.jpg We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_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 |
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#5
Posted to rec.woodworking
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Treehouse bridge update: one section blew down in the California storms
On Wednesday, December 31, 2014 4:24:06 AM UTC-5, Danny D. wrote:
We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_b.jpg My dog is reluctant to cross any bridge that he can see through. For example, we have a grated swing bridge that is swung across the opening between a bay and a lake during the winter months. When the bridge is across the opening, I practically have to drag him across. When it is swung against the shore and used as a fishing pier during the summer, he doesn't want to walk on it even though it's only about 5' above the water. When we hike through the woods, he hesitates at any type of bridge that does not have a solid walkway. He doesn't seem to be afraid of heights, since he will stand at the edge of "cliff" or on the wall along a gorge walkway, etc. I'm not sure what's going through his head but it's petty consistent when it comes to bridges. |
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#6
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the Californiastorms
On 12/31/2014 9:35 AM, woodchucker wrote:
On 12/31/2014 4:23 AM, Danny D. wrote: The third section blew down in the California storms. https://c4.staticflickr.com/8/7511/1...6a237edc_c.jpg It was just the frame, and a few deck timbers: https://c4.staticflickr.com/8/7478/1...ec573ed9_c.jpg Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg These two smaller redwoods apparently bowed to the sides: https://c4.staticflickr.com/8/7541/1...27bc211f_c.jpg We had only the far end attached to the steel cable: https://c1.staticflickr.com/9/8658/1...9ac90178_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/8/7478/1...ec573ed9_c.jpg We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_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. 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 |
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#7
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the California storms
On Wed, 31 Dec 2014 09:23:38 +0000 (UTC), "Danny D."
wrote: The third section blew down in the California storms. https://c4.staticflickr.com/8/7511/1...6a237edc_c.jpg It was just the frame, and a few deck timbers: https://c4.staticflickr.com/8/7478/1...ec573ed9_c.jpg Apparently the mistake was to attach it here to the redwood: https://c4.staticflickr.com/8/7515/1...3135617f_c.jpg These two smaller redwoods apparently bowed to the sides: https://c4.staticflickr.com/8/7541/1...27bc211f_c.jpg We had only the far end attached to the steel cable: https://c1.staticflickr.com/9/8658/1...9ac90178_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/8/7478/1...ec573ed9_c.jpg We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_b.jpg 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/articl...RT-5985826.php Here's The Brat, the kid what does our PCB layouts. https://dl.dropboxusercontent.com/u/...ee/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 |
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#8
Posted to rec.woodworking
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Treehouse bridge update: one section blew down in the Californiastorms
On 12/31/2014 9:19 AM, DerbyDad03 wrote:
.... My dog is reluctant to cross any bridge that he can see through. ... .... I'm not sure what's going through his head but it's petty consistent when it comes to bridges. Same principle as the cattle guard...all it takes is an apparent opening that they can't perceive they might not step into. One can even dispense with the pit and grate entirely and simply paint lines on a road surface... http://www.loc.gov/item/ncr001290 -- |
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#9
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the Californiastorms
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/8/7536/1...5aedd4e3_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 ---remove "DOT" ^^^^ to reply |
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#10
Posted to alt.home.repair,rec.woodworking,sci.electronics.design
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Treehouse bridge update: one section blew down in the California storms
On Wed, 31 Dec 2014 09:23:38 +0000 (UTC), "Danny D."
wrote: We still can't get the dog out onto the bridge yet, though: https://c4.staticflickr.com/8/7536/1...5aedd4e3_b.jpg Listen to his whispers |
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