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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Fireproof safe
I've seen "fireproof" gunsafes at sporting goods stores that seem to only
have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? -- John L. Weatherly please remove XXXs to reply via email |
#2
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Fireproof safe
"John L. Weatherly" fired this volley
in : I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? Prob'ly would, but it is pretty much standard practice to line "fireproof" stuff with low-strength, highly aerated gypsum; the thicker, the better. Most (even inexpensive) home-quality firesafes still have over a full inch of gypsum between the walls. A one hour fire rating isn't all that hard to achieve. Kaowool would be overkill in terms of cost -- how about boiler liner sheets, instead? They're better insulators than gypsum, and just about dirt cheap. LLoyd |
#3
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Fireproof safe
"John L. Weatherly" wrote in message .. . I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? I am a locksmith, and the insulation in fire safes is designed to hold moisture until heated and then it releases it into the interior compartment of the box. I had a customer that stored his ammo in a fire file in his garage. While he was on a camping trip, the car in his garage had developed a leak in the gas tank and when the fumes built up to the pilot for the water heater BOOM!! The garage door was blown across the street and over the neighbors roof ending up in their pool in the back yard. His Snap On tools had annealed from the intense heat, but when he opened the file after the fire, the plastic boxes were not melted in the slightest. Fires get very hot, the Kaowool type insulation does not serve well in that kind of heat for the length of time needed. -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. |
#4
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Fireproof safe
On Jan 11, 4:27 pm, "John L. Weatherly"
wrote: I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? -- John L. Weatherly please remove XXXs to reply via email The reason they use " drywall " is that it has a lot of water in it bound in the material. On prolonged heating the water is driven out and the " drywall " turns to powder. This takes a bunch of btu's to do this. So while Kaowool would keep the heat from getting in, it would not do as good a job at keeping the contents cool. Dan |
#5
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Fireproof safe
On 2008-01-11, Roger Shoaf wrote:
I had a customer that stored his ammo in a fire file in his garage. While he was on a camping trip, the car in his garage had developed a leak in the gas tank and when the fumes built up to the pilot for the water heater BOOM!! The garage door was blown across the street and over the neighbors roof ending up in their pool in the back yard. Did this customer, per chance, fix his punctured tank with a wooden plug, prior to the accident? i |
#6
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Fireproof safe
On 11 Jan, 16:27, "John L. Weatherly"
wrote: I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? No, Kaowool is an insulator, but only an insulator. The lining in a firesafe contains a significant quantity of water too, bound up as hydrated lime compounds in this "drywall". When you burn the safe, this water is released and boiling it off absorbs heat energy. Overall, this keeps the contents cooler than Kaowool alone would. Obviously this is a transitory condition. It only works for as long as there's water to release. This is why firesafes with thick or thin walls are rated for diifferent _durations_ of fire, not necessarily temperatures. It's also a little more sophisticated than plain drywall, although drywall is itself quite a good fire barrier in house construction. The chemistry of firesafes like this goes back to the early Victorian period - there are safe sites on the web that describe the inventors and their patents in detail. |
#7
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Fireproof safe
"Andy Dingley" wrote in message ... On 11 Jan, 16:27, "John L. Weatherly" wrote: I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? No, Kaowool is an insulator, but only an insulator. The lining in a firesafe contains a significant quantity of water too, bound up as hydrated lime compounds in this "drywall". So the material they line the safes with is lime, rather than gypsum? -- Ed Huntress |
#8
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Fireproof safe
"John L. Weatherly" wrote:
I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. Wes |
#9
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Fireproof safe
"Ed Huntress" wrote:
So the material they line the safes with is lime, rather than gypsum? I'm sure hoping not. Gypsum CaSO4·2H2O Lime CaO |
#10
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Fireproof safe
In article , Ignoramus10310 wrote:
On 2008-01-11, Roger Shoaf wrote: I had a customer that stored his ammo in a fire file in his garage. While he was on a camping trip, the car in his garage had developed a leak in the gas tank and when the fumes built up to the pilot for the water heater BOOM!! The garage door was blown across the street and over the neighbors roof ending up in their pool in the back yard. Did this customer, per chance, fix his punctured tank with a wooden plug, prior to the accident? ROTFLMAO |
#11
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Fireproof safe
"Wes" wrote in message ... "Ed Huntress" wrote: So the material they line the safes with is lime, rather than gypsum? I'm sure hoping not. Gypsum CaSO4·2H2O Lime CaO I'll bet you know I was shorthanding for hydrated lime, or calcium hydroxide, Ca(OH2). g Hydrated lime is what plaster walls were once made of (as in the walls in my house). Drywall is semi-hydrous calcium sulphate, or gypsum. Either one will ablate, or give of combined water, when it's heated. I was just curious about whether the actual stuff used to line safes was the same gypsum board used for walls, or something special made from hydrated lime. -- Ed Huntress |
#12
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Fireproof safe
On 11 Jan, 19:45, "Ed Huntress" wrote:
No, Kaowool is an insulator, but only an insulator. The lining in a firesafe contains a significant quantity of water too, bound up as hydrated lime compounds in this "drywall". So the material they line the safes with is lime, rather than gypsum? Milner's original fireproof patent was for about 4" of sawdust, kept wet! "Lime" in en_GB speak is generally hydrated lime, not CaO. That's termed "quicklime". It's crucial to the fireproofing that this would be "slaked" lime (i.e. hydrated), not quicklime. The stuff used is safes has varied. As was typical for Victorian innovations, much of the "innovation" was driven by trying to dodge around other peoples' patents, so much as choosing materials for their own sake. Both lime (carbonate) and gypsum (sulphate) compounds have been used, also alum (aluminium / potassium sulphate, rather than calcium sulphate). |
#13
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Fireproof safe
"Andy Dingley" wrote in message ... On 11 Jan, 19:45, "Ed Huntress" wrote: No, Kaowool is an insulator, but only an insulator. The lining in a firesafe contains a significant quantity of water too, bound up as hydrated lime compounds in this "drywall". So the material they line the safes with is lime, rather than gypsum? Milner's original fireproof patent was for about 4" of sawdust, kept wet! "Lime" in en_GB speak is generally hydrated lime, not CaO. That's termed "quicklime". It's crucial to the fireproofing that this would be "slaked" lime (i.e. hydrated), not quicklime. The stuff used is safes has varied. As was typical for Victorian innovations, much of the "innovation" was driven by trying to dodge around other peoples' patents, so much as choosing materials for their own sake. Both lime (carbonate) and gypsum (sulphate) compounds have been used, also alum (aluminium / potassium sulphate, rather than calcium sulphate). Thanks, Andy. There's *another* topic for cocktail party conversations I've learned from this group. You should see how I get them going by talking about wiring for three-phase motors! -- Ed Huntress |
#14
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Fireproof safe
In article , "Ed Huntress" wrote:
"Wes" wrote in message ... "Ed Huntress" wrote: So the material they line the safes with is lime, rather than gypsum? I'm sure hoping not. Gypsum CaSO4·2H2O Lime CaO I'll bet you know I was shorthanding for hydrated lime, or calcium hydroxide, Ca(OH2). g I'll bet you mean Ca(OH)2. g Hydrated lime is what plaster walls were once made of (as in the walls in my house). Hydrated lime is *part of* what plaster walls *are still* made of, among other constituents including sand, portland cement, perlite or vermiculite, and (in bygone days) often horsehair. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#15
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Fireproof safe
"Doug Miller" wrote in message . net... In article , "Ed Huntress" wrote: "Wes" wrote in message ... "Ed Huntress" wrote: So the material they line the safes with is lime, rather than gypsum? I'm sure hoping not. Gypsum CaSO4·2H2O Lime CaO I'll bet you know I was shorthanding for hydrated lime, or calcium hydroxide, Ca(OH2). g I'll bet you mean Ca(OH)2. g Hydrated lime is what plaster walls were once made of (as in the walls in my house). Hydrated lime is *part of* what plaster walls *are still* made of, among other constituents including sand, portland cement, perlite or vermiculite, and (in bygone days) often horsehair. OK, somebody was bound to get technical. g My walls are a three-layer job: scratch coat over wood lath, with horsehair; brown coat; and finish coat. Almost all of the original is still there, although I've done some patching. I no longer finish with slaked lime, however, when I have to fix something. It takes too long to cure. -- Ed Huntress |
#16
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Fireproof safe
"Wes" wrote in message ... Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. Yep, that would work. Construction adhesive is your friend. Actually, I used a combination of brick and patio stones on the outside if mine, and then covered the ooutside in ceramic floor tile. My goals (both equally important) were to improve the fire resistance of the safe, while at the same time rendering it immobile. Vaughn |
#17
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Fireproof safe
Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. That is an intresting concept. " lining on the outside " . Havent seen that done yet. :-) All the linings I've ever seen or heard of have been on the inside. Oh well another (you know what I mean) ...lew... |
#18
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Fireproof safe
On 12 Jan, 15:29, Lew Hartswick wrote:
Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. That is an intresting concept. " lining on the outside " . Havent seen that done yet. :-) Standard practice in the UK. Not on the "outside outside", but if you have a garage space that's inside the outside walls of a house, you need a couple of layers of drywall (aka plasterboard) fastened up on the _fire_ side of the structure. And that's for our style of house construction with real bricks too, not US ticky-tacky boxes! |
#19
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Fireproof safe
"Andy Dingley" wrote in message ... On 12 Jan, 15:29, Lew Hartswick wrote: Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. That is an intresting concept. " lining on the outside " . Havent seen that done yet. :-) Standard practice in the UK. Not on the "outside outside", but if you have a garage space that's inside the outside walls of a house, you need a couple of layers of drywall (aka plasterboard) fastened up on the _fire_ side of the structure. And that's for our style of house construction with real bricks too, not US ticky-tacky boxes! If your houses are built with real bricks, why do you need fire protection? Do you make your bricks out of wood chips? -- Ed Huntress |
#20
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Fireproof safe
John L. Weatherly wrote:
I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? Having read most of the posts on this thread it reminded me of looking into fire safes for protection of data stored on computer storage media. This brought up the difference between a fire safe intended for the protection of paper or other items which could stand upto temps of 150C or more without damage, a machinist I knew stored all his gear cutters in a large old firesafe, and a data safe intended for the storage of digital media that might be damaged at temps much above 40C. Does anyone have any idea of the mechanism used to keep the internals of a data safe at a safe low temp compared to the mechanisms used in a fire safe which seem to be using the heat taken by removing the water of hydration from gypsum and the like. A company I worked for in the past might be in for a shock if the had a fire as they had the server hard drive in a cheap firesafe on the end of the ribbon cable, might not have fared well but luckily I don't think it has been tested. |
#21
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Fireproof safe
On 12 Jan, 18:48, "Ed Huntress" wrote:
Standard practice in the UK. Not on the "outside outside", but if you have a garage space that's inside the outside walls of a house, you need a couple of layers of drywall (aka plasterboard) fastened up on the _fire_ side of the structure. And that's for our style of house construction with real bricks too, not US ticky-tacky boxes! If your houses are built with real bricks, why do you need fire protection? Floors and ceilings mostly. Although we build walls in masonry, we tend to use suspended wooden floors rather than poured concrete slabs. This is one reason why we popularly DIY install floorsafes, not wall safes (other way round to the USA). Also drywall cladding is needed for any penetration of the bricks, including around plumbing. So when your adjacent garage / workshop roof leaks, there's a few inches of rockwool to soak up the insulation, then a few layers of plasterboard. By the time you even notice, it's a right old nasty mess up there. Guess what tomorrow's job is? 8-( If you have a _major_ fire in a UK house, it's almost always because the fire has got into a roof or ceiling void and then spread that way. Room fires are generally survivable (if you're elsewhere and leave), multi-room fires are the ones that kill families (we've had a bunch of them lately). |
#22
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Fireproof safe
basic concept is to make a thermal impedance mismatch as severe as
possible - multiple layers of insulator and reflector - the metal safe is a reflector - so insulator on the outside, then another reflector layer will make it a better insulator "Lew Hartswick" wrote in message ... Nothing is fireproof. As you may have noticed, you can improve your home security container by lining it with dry wall on the outside. That is an intresting concept. " lining on the outside " . Havent seen that done yet. :-) All the linings I've ever seen or heard of have been on the inside. Oh well another (you know what I mean) ...lew... -- Posted via a free Usenet account from http://www.teranews.com |
#23
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Fireproof safe
Yep ranks right behind the subject of "2 phase motors".
Thanks, Andy. There's *another* topic for cocktail party conversations I've learned from this group. You should see how I get them going by talking about wiring for three-phase motors! -- Ed Huntress |
#24
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Fireproof safe
"RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. -- Ed Huntress Thanks, Andy. There's *another* topic for cocktail party conversations I've learned from this group. You should see how I get them going by talking about wiring for three-phase motors! -- Ed Huntress |
#25
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Fireproof safe
Ed Huntress wrote:
"RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. It wouldn't 'Phase' me! ;-) -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#26
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Fireproof safe
"Michael A. Terrell" wrote in message ... Ed Huntress wrote: "RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. It wouldn't 'Phase' me! ;-) Two demerits for that one. -- Ed Huntress |
#27
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Fireproof safe
Ed Huntress wrote:
"Michael A. Terrell" wrote in message ... Ed Huntress wrote: "RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. It wouldn't 'Phase' me! ;-) Two demerits for that one. No thanks, I've already got thousands of them! ;-) I got most of the demerits for clearing out the entire engineer department at Microdyne, simply by marching in with a blank sheet of copier paper, and a very ****ed look on my face. They 'Phased out' very quickly! ;-) -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#28
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Fireproof safe
On Sun, 13 Jan 2008 22:37:24 -0500, with neither quill nor qualm, "Ed
Huntress" quickly quoth: "Michael A. Terrell" wrote in message ... Ed Huntress wrote: "RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. It wouldn't 'Phase' me! ;-) Two demerits for that one. Sounds duplicitous. ----------------------------------------------- Never attempt to traverse a chasm in two leaps. =============================================== |
#29
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Fireproof safe
"Larry Jaques" wrote in message ... On Sun, 13 Jan 2008 22:37:24 -0500, with neither quill nor qualm, "Ed Huntress" quickly quoth: "Michael A. Terrell" wrote in message ... Ed Huntress wrote: "RoyJ" wrote in message ... Yep ranks right behind the subject of "2 phase motors". I've already worked that one to death. They see me coming when I have a stack of phase diagrams in my hand. It wouldn't 'Phase' me! ;-) Two demerits for that one. Sounds duplicitous. Right. The Chinese make them. They're known as Yin/Yang motors. -- Ed Huntress |
#30
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Fireproof safe
Thanks for all of the enthusiastic replies. I never would have thought of
drywall on the outside. Cheaper and easier than re-lining for sure. -- John L. Weatherly please remove XXXs to reply via email |
#31
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Fireproof safe
On Mon, 14 Jan 2008 08:12:19 -0600, with neither quill nor qualm,
"John L. Weatherly" quickly quoth: Thanks for all of the enthusiastic replies. I never would have thought of drywall on the outside. Cheaper and easier than re-lining for sure. There is a newer style of drywall which is more impervious to fire, fungus, mold, termite, and water damage. http://www.mag-board.com/ I've never seen any locally. When my CA home was infested with termites, they ate the wallpaper and paper covering on the drywall, leaving exposed gypsum. I couldn't believe it. This stuff should be safe from that. --- Chaos, panic, and disorder--my work here is done. |
#32
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Fireproof safe
On Jan 16, 10:35 am, "Stormin Mormon"
wrote: The drywall / gypsum contains water, chemically combined in. In case of fire, it releases the water, helping hold the temperature down. Fire resistant safes just buy some time for the FD to get there and put out the fire. -- Christopher A. Young Learn more about Jesus www.lds.org . "John L. Weatherly" wrote in messagenews:FqSdnW8YSO2hBBranZ2dnUVZ_oWdnZ2d@cavte l.net... I've seen "fireproof" gunsafes at sporting goods stores that seem to only have drywall lining the walls. Wouldn't a layer of Kaowool in place of the drywall do a much better job? It keeps the heat IN the forge pretty well. I realize this would impact the cost a lot; just thinking out loud. What do y'all think? -- John L. Weatherly please remove XXXs to reply via email My theory in the firesafe is to put it in a place where the house collapses on it and chokes itself of air to burn IF the unthinkable happens me and my sawzall know which corner of the house to work through to get the truly critical documents and we will expect it to be buried under mainly inflammable debris so its almost surrounded by tile and drywall and the house could collapse on it and not throw burnable materials onto it |
#33
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Fireproof safe
Stormin Mormon wrote:
The drywall / gypsum contains water, chemically combined in. In case of fire, it releases the water, helping hold the temperature down. Fire resistant safes just buy some time for the FD to get there and put out the fire. Will the moisture contained in the drywall change the humidity in the safe? I don't like rusty firearms... -- John L. Weatherly please remove XXXs to reply via email |
#34
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Fireproof safe
"John L. Weatherly" wrote in message .. . Will the moisture contained in the drywall change the humidity in the safe? I don't like rusty firearms... Yes. Mine came with some kind of a special cloth that you are supposed to keep in there that is supposed to somehow help the problem. My papers always smell musty when I take them out of the safe. Perhaps they make gun safes differently? Vaughn |
#35
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Fireproof safe
On Jan 11, 11:30*am, Ignoramus10310 ignoramus10...@NOSPAM.
10310.invalid wrote: On 2008-01-11, Roger Shoaf wrote: I had a customer that stored his ammo in a fire file in his garage. While he was on a camping trip, the car in his garage had developed a leak in the gas tank and when the fumes built up to the pilot for the water heater BOOM!! *The garage door was blown across the street and over the neighbors roof *ending up in their pool in the back yard. Did this customer, per chance, fix his punctured tank with a wooden plug, prior to the accident? i It wouldn't be Gunner....he is like the rest of us...the garage would be FULL of tools...no room for the car. TMT |
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