Ping Larkin
in [Design]
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From: John Larkin on 29 Oct 2009 22:49 On Thu, 29 Oct 2009 21:32:08 -0400, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: > >krw wrote: >> >> Most use heat pumps year round here. We haven't had the house open >> more than a few days so far this fall. It was quite warm late this >> fall and it's been raining since. Last year was beautiful this time >> of year. This year, not so much. > > > I've only had one day cool enough to open all the doors and windows >this fall. We had a few days this summer warm enough to open the doors and windows. John
From: Michael A. Terrell on 30 Oct 2009 02:04 John Larkin wrote: > > On Thu, 29 Oct 2009 21:32:08 -0400, "Michael A. Terrell" > <mike.terrell(a)earthlink.net> wrote: > > > > >krw wrote: > >> > >> Most use heat pumps year round here. We haven't had the house open > >> more than a few days so far this fall. It was quite warm late this > >> fall and it's been raining since. Last year was beautiful this time > >> of year. This year, not so much. > > > > > > I've only had one day cool enough to open all the doors and windows > >this fall. > > We had a few days this summer warm enough to open the doors and > windows. > > John I'm waiting for winter so I can fix the mess made by the ID10Ts who installed the central air when my dad was staying here. They set the pad on a tree stump that has rotted, so it is leaning about 25 degrees away from the house. It is a package unit, so I have to remove the ductwork, wiring and drain pipe, then move it to the garage. Then I have to set forms and pour about 25, 90 pound bags of Quickcrete. I didn't want the damn thing, but after they cut all the holes in the foundation and floors, I'm stuck with it. I have never used it, in the ten years I've lived here. I just air condition the rooms I'm using, then open the doors to those rooms to cool the rest of the house at night. -- The movie 'Deliverance' isn't a documentary!
From: Martin Brown on 30 Oct 2009 04:31 Michael A. Terrell wrote: > Joerg wrote: >> Michael A. Terrell wrote: >>> Tell that to people who lose homes and businesses to lightning. >>> >> Because builders and codes in the US fail to provide for proper >> lightning arresters and we build houses from lumber. > > So, you've never seen lightning hit a poured concrete building? Yes. Been in one when it was hit. Responsible for its computing systems. > Pieces of it scattered all over the place and exposed, partially > vaporized rebar. That building did have a wood roof, but the lightning > struck the walls because of the required rebar and damp concrete. I Sounds like a shoddy build quality then doesn't it? Concrete in a finished building should not be damp internally. The surface may be wet. > suppose you'll tell me that never happens in Europe, because they are so > much smarter and that the laws of physics don't apply there? Seems quite likely. UK buildings have dampcourses to avoid wet walls and most large industrial buildings have lightning conductors on them. The building that I worked in took a direct hit once. The lightning didn't go down the official lightning conductor as some scrote had nicked it for the copper. So it found the next nearest thing which was the telephone wire cluster trunking and vapourised most of that down to the ground. The secretary in reception was very upset afterwards and the wiremen took a few days to fix it but damage was very localised and largely superficial. The strangest thing was that we were not the tallest thing around - a super grid pylon was no more than 200m away. I expect the large area shallow angle metal roof made us a target. The computers expensive terminal drivers died saved the cheap surge arresters and the part of the computer that is nominally most sensitive to electrical interference kept on running. Only the terminals on cables that ran underground from the building were a problem. Regards, Martin Brown
From: Jim Thompson on 30 Oct 2009 10:45 On Fri, 30 Oct 2009 02:04:57 -0400, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: > >John Larkin wrote: >> >> On Thu, 29 Oct 2009 21:32:08 -0400, "Michael A. Terrell" >> <mike.terrell(a)earthlink.net> wrote: >> >> > >> >krw wrote: >> >> >> >> Most use heat pumps year round here. We haven't had the house open >> >> more than a few days so far this fall. It was quite warm late this >> >> fall and it's been raining since. Last year was beautiful this time >> >> of year. This year, not so much. >> > >> > >> > I've only had one day cool enough to open all the doors and windows >> >this fall. >> >> We had a few days this summer warm enough to open the doors and >> windows. >> >> John > > > I'm waiting for winter so I can fix the mess made by the ID10Ts who >installed the central air when my dad was staying here. They set the pad >on a tree stump that has rotted, so it is leaning about 25 degrees away >from the house. It is a package unit, so I have to remove the ductwork, >wiring and drain pipe, then move it to the garage. Then I have to set >forms and pour about 25, 90 pound bags of Quickcrete. I didn't want the >damn thing, but after they cut all the holes in the foundation and >floors, I'm stuck with it. I have never used it, in the ten years I've >lived here. I just air condition the rooms I'm using, then open the >doors to those rooms to cool the rest of the house at night. Around here we have a company that can pump concrete under such a thing and bring it up to level. Next door neighbor had a driveway panel that had settled ~2" along one joint... they pumped it up to match the adjacent panel. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | "Somebody had to build the ceiling... before Michelangelo could go to work." - John Ratzenberger http://analog-innovations.com/SED/Somebody_had_to_build_the_ceiling.pdf
From: Michael A. Terrell on 30 Oct 2009 11:47
Martin Brown wrote: > > Michael A. Terrell wrote: > > Joerg wrote: > >> Michael A. Terrell wrote: > > >>> Tell that to people who lose homes and businesses to lightning. > >>> > >> Because builders and codes in the US fail to provide for proper > >> lightning arresters and we build houses from lumber. > > > > So, you've never seen lightning hit a poured concrete building? > > Yes. Been in one when it was hit. Responsible for its computing systems. The tower was hit as well, and it was 50 feet higher than the building. It was a TV studio There may have been more than one strike. It isn't unusual to have several thousand ligthnng strikes in a single storm in Central Florida. I was called when the transmitter operator lost the remote satellite feed, and couldn't connect to the remote controls by telephone. It took out the main computer, five terminals, the entire telephone system, the 11 GHz STL, all the LNAs on all the C-band sat dishes and part of the electrical system. The building had UFER grounding along with multiple ground rods thatwere bonded to the UFER. The tower had a complete grounding system that was bonded, as well. Lightning damage to stations is common in Florida. There is a layer of limestone over the Florida Aquifer, and the soil has a lot of sand over most of the southern half of the state. A couple large industrail steel buildings ended up with magnetized beams after strikes, wich caused problems for computer and video monitors. I've seen a few that affeded convegence & purity when you got within six feet of a support column. > > Pieces of it scattered all over the place and exposed, partially > > vaporized rebar. That building did have a wood roof, but the lightning > > struck the walls because of the required rebar and damp concrete. I > > Sounds like a shoddy build quality then doesn't it? Concrete in a > finished building should not be damp internally. The surface may be wet. Concrete always has some moisture. It won't be visably wet inside, but the olny way to remove the moisture is to bake it in a furnace. <http://www.google.com/search?q=moisture+content+of+cured+concrete&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a> > > suppose you'll tell me that never happens in Europe, because they are so > > much smarter and that the laws of physics don't apply there? > > Seems quite likely. UK buildings have dampcourses to avoid wet walls and > most large industrial buildings have lightning conductors on them. > > The building that I worked in took a direct hit once. The lightning > didn't go down the official lightning conductor as some scrote had > nicked it for the copper. So it found the next nearest thing which was > the telephone wire cluster trunking and vapourised most of that down to > the ground. The secretary in reception was very upset afterwards and the > wiremen took a few days to fix it but damage was very localised and > largely superficial. The strangest thing was that we were not the > tallest thing around - a super grid pylon was no more than 200m away. I > expect the large area shallow angle metal roof made us a target. > > The computers expensive terminal drivers died saved the cheap surge > arresters and the part of the computer that is nominally most sensitive > to electrical interference kept on running. Only the terminals on cables > that ran underground from the building were a problem. Low grade EMP or ground differential. -- The movie 'Deliverance' isn't a documentary! |