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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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#81
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On Fri, 23 Sep 2005 08:28:58 GMT, Gunner
wrote: On Fri, 23 Sep 2005 06:42:26 GMT, "carl mciver" wrote: I honestly don't recall the exact sequence, but I did see the cap blow off with a large pop and slam into his knee sideways. He went down like someone pushing the locked knee of someone standing on one leg. Screaming bloody murder. I always thought those firemen were real men and would never scream in pain. Guess I was wrong.... Ever wonder why :kneecapping: someone is considered a really bad thing? Biker days again? -- Cliff |
#82
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On 23 Sep 2005 10:41:01 -0700, jim rozen
wrote: In article , Karl Vorwerk says... It doesn't prevent all of them. Two or three years ago someone ran over one here and it looked just like on the movies. Heh. Yep, if you give em a hard enough knock to the side, it seems to break the valve assembly at the bottom. This was proved at the corner near my local middle school one lunchtime. Truck cut the corner too sharp, and the back wheels clobbered the hydrant which was *right* at the corner. They had a tough time getting all those kids (me included) back into the school after lunch recess, the water was shooting about five feet into the air! Ahh, but you do not know the secret, Grasshopper... ;-) The fire hydrant is designed to take that kind of abuse in stride. (Same thing with vacuum breakers or other large waterworks devices mounted along the side of the road.) That bolted flange connection at the ground or sidewalk level of the hydrant is there for a reason - they use hollow bolts (filled with grease to stop rust) that are designed to shear and let the hydrant break away when a car or truck hits them, usually long before breaking the water main feed pipe underground. And if there isn't a sidewalk there to provide a proper fracture line for the flange bolts, they usually also install a 12" tall cast iron extension riser below ground with a strategically placed weakening notch around the middle - if a piece of pipe is going to break, they know exactly how and where. Makes a nice straight 8" fountain until the water company or the fire department shuts off the service valve. Then a water department crew can come out in a few days with a small boom hoist (hydrants are heavy!) a new set of breakaway bolts and a fresh flange gasket, and reattach the hydrant. -- Bruce -- -- Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop Electrician for Westend Electric - CA726700 5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545 Spamtrapped address: Remove the python and the invalid, and use a net. |
#83
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That would explain it. I live in Hawaii. Not much in the way of hard
freezes. Karl "Bruce L. Bergman" wrote in message ... On Fri, 23 Sep 2005 10:42:59 GMT, "Karl Vorwerk" wrote: It doesn't prevent all of them. Two or three years ago someone ran over one here and it looked just like on the movies. Karl It all depends on where you live - if the odds of a hard freeze in your town are at or near zero, the fireplug probably will not have all that fancy (and very expensive) below-ground valve and self-draining stuff, the valves are all inside the top of the plug. Shear it off, and you have an instant municipal fountain. (At least till they turn off the service valve at the water main.) They only spend the extra money to rig up freeze-proof fire hydrants in places where they actually get freezes. And if they don't have the self-draining hydrants, after they're done testing or using the hydrant they turn off the bottom valve, siphon out some of the water, and dump in anti-freeze. -- Bruce -- -- Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop Electrician for Westend Electric - CA726700 5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545 Spamtrapped address: Remove the python and the invalid, and use a net. |
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