I saw the excerpt from the Rolls Royce documentary again the other night.
They were showing the fan blade that operates at a temperature higher than the blade material's melting temperature.
That is "design" !
the 'official' name is chicken gun, we have here one from pilkington, used the gun once
what bothers me the chicken must be killed without letting the blood out..
sorry for OOT , can not help🙂
what bothers me the chicken must be killed without letting the blood out..
sorry for OOT , can not help🙂
If you put the chicken at the focal point of the new building in London, you'll have roast chicken in no time! Perhaps convert those parking spaces into a Kebab or Chicken Roti stand?
Didn't Clark Griswold's brother-in-law roast a chicken that way in "Vacation"? OK if you like your chicken medium rare.
Is a big part of it. Design is key. It all starts at the beginning.
Not a problem if done right. You design the system according to the climate.
Again, a non-issue if designed properly.
I believe you guys have experienced design, materials or application where the chain has broken somewhere. Happens in every trade but roofing is one of the more obvious when things go wrong. 🙂
Regarding the glass: If it Low E (emmissivity) glass, its reflection of the IR component would be huge. Even flat panes of Low E glass have been known to melt vinyl siding an adjacent corners in residental applications.
The walkie talkie building is already melting and burning facades and interiors of storefronts in its ray path so far. That would be a good science project for a student. Try to calculate what buildings will be hit over the course of a year.
I'm sure there will be lots of lawsuits directed at the developers, the architects, the glass manufacturer, even to local building inspectors and zoning boards.
And Frank Gehry? Another Frank! An architect friend of mine tells me that his buildings rely on so much bondo, caulk, silicone, etc., its laughable.
The walkie talkie building is already melting and burning facades and interiors of storefronts in its ray path so far. That would be a good science project for a student. Try to calculate what buildings will be hit over the course of a year.
I'm sure there will be lots of lawsuits directed at the developers, the architects, the glass manufacturer, even to local building inspectors and zoning boards.
And Frank Gehry? Another Frank! An architect friend of mine tells me that his buildings rely on so much bondo, caulk, silicone, etc., its laughable.
We had one winter here in MN (95-96?) where we had so much snow and rain that the water on the roof went over the ~4-6" curbs in some areas and started running down the ventilation system...
Leaking oil is very dangerous because it doesn't immediately evaporate like gasoline. Typical glycol DOT 3 brake fluid is only moderately flammable.
Large flat roofs have to have expansion joints somewhere to cope with high temperatures in the tropical noon sun.
Unfortunately the rain is so heavy here, that I have seen over 1" pooling on the roof even though there is nothing stopping it flowing over the edges. It finds those joints where the silicone has shrunk after a few weeks.
Sounds like a problem with specifying of materials.
Amount, location and anticipated level of movement of expansion joints are determined by a number of factors.
That's not unheard of. Deck deflection can play a part on older buildings.
This statement has me confused. Liquid silicone based products are rarely compatible with any component on a roof, and even then, no type of caulk is used as the primary water rejector. If what you say is true I can see where the problems might lie.
In this country we range from 40ºC to -70ºC and from desert to rain forest and meters of accumulated snow. We have to be careful how things are done so perhaps I am out of touch with other parts of the world.
I would have thought that the meters of snow would test a flat roofs structural integrity much more than any propensity to leak.
Mind it would certainly leak if the flat roof ceases to be on the top and finds itself at the bottom of a building but water damage is then the least of worries.
Mind it would certainly leak if the flat roof ceases to be on the top and finds itself at the bottom of a building but water damage is then the least of worries.
Indeed. Without the structure, my job doesn't matter.
This is why I sometimes disagree with seismic updating. You make a huge diaphragm so everyone gets killed at the same time instead some of the people escaping.
ah Cal you're in the roofing business I see 🙂. For me, everything downstream of concept are implementations.
As long as we respect building codes there should be no problems, Australian architects must be using their australian design rules/ADR's in Malaysia, maybe combined with local codes, still puzzles me why their roof leaking
I love Frank Gehry's works though, even they're nightmare for engineers, fabricator & contractors 🙂
woops. made mistake, Aussy ADR's are for vehicles ..building codes are ABCB's
As long as we respect building codes there should be no problems, Australian architects must be using their australian design rules/ADR's in Malaysia, maybe combined with local codes, still puzzles me why their roof leaking
I love Frank Gehry's works though, even they're nightmare for engineers, fabricator & contractors 🙂
woops. made mistake, Aussy ADR's are for vehicles ..building codes are ABCB's
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I.M. Pei (" I Am Paid") designed some of the buildings on the MIT campus, and most notably, the Hancock Tower in Boston. People use to call it the "Plywood Palace", because the underdesigned windows would get sucked out by the wind, showering unsuspecting pedestrians with glass. When I first arrived in Boston, a fair number of the windows in the building were shored up with plywood.
OK, anything less that 1 in 4 is considered flat. My beef is with the REALLY flat roofs. The problem with flat roofs is some idiots actually build them FLAT. All it takes is a few degrees easily hidden by the curb. This prevents standing water which will always find a way in. Sure, modern materials are better than tar and cardboard, but you are still fighting mother nature. She always wins. Another really stupid mistake is to rely on drains in the center of the roof. They WILL clog and leave you with a lot of water on the roof Again, just a little slope to the outside and you avoid all these issues. Then some idiot invented the butterfly roof and the builder actually made the center level.
Of course, there was the infamous building in Denver with a curved glass roof that shed blocks of ice 60 stories onto pedestrians. Didn't leak though.
Of course, there was the infamous building in Denver with a curved glass roof that shed blocks of ice 60 stories onto pedestrians. Didn't leak though.
Hancock Tower glass failure was far, far more interesting technically than 'sucked out by wind'; wind had nothing to do with. Pilkington paid for that fix, owing to assembly technique for the IGUs. Incedentally - only 63panes failed - although they were over 230Kg each.
And flat,flat,flat roofs aren't actually difficult to do if you ensure the underlying design and componentry is up to it for the projected lifespan (and without maintenance - assume the owners won't do any). I've designed roofs to stand 200mm of standing water in extremis while using falls under 1:100; do it right and even the membrane manufacturer will warrant this for 30years+.
Insufficient design / relying solely on workmanship to cover-up design problems is where the failures come from.
And flat,flat,flat roofs aren't actually difficult to do if you ensure the underlying design and componentry is up to it for the projected lifespan (and without maintenance - assume the owners won't do any). I've designed roofs to stand 200mm of standing water in extremis while using falls under 1:100; do it right and even the membrane manufacturer will warrant this for 30years+.
Insufficient design / relying solely on workmanship to cover-up design problems is where the failures come from.
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