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Topic: Manhole

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	Manhole Cover - Background, History, Raw Materials, Design, The Manufacturing
		Manhole covers are the round iron plates sunk into streets and sidewalks that keep passers-by from falling into manholes.
		Manhole covers must be a minimum of 22 in (56 cm) in diameter, but can be as much as 60 in (1.5 m) in diameter.
		Manhole lids are heavy because of the material they are made from and because it makes them difficult to remove, not to prevent gas from escaping.
	www.madehow.com /Volume-7/Manhole-Cover.html (2161 words)

	Manhole Covers
		Bobbi Mastrangelo, The “Grate Artist”, is internationally known for her unique creations based on the theme of manhole covers.
		Manhole covers were designed to provide access to underground utilities such as power, sewerage, gas, telephone etc. Beneath them lies a surface tunnel, with labyrinthine corridors connected.
		By doing that she lifted the heavy manhole and was courageous enough to go back down into the labyrinthine corridors.
	www.dailywriting.net /ManholeCovers.htm (1026 words)

	Manhole - Wikipedia, the free encyclopedia
		A manhole or maintenance hole is the top opening to an underground utility vault used to house an access point for making connections or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains and gas.
		The reason most manhole covers are circular is that the round cover cannot fall into its own hole (the maximum diagonal distance is the same as the diameter, unlike rectangular covers where the diagonal distance is greater than the maximum length or width).
		Manholes are generally found in urban areas, in streets and occasionally under sidewalks.
	en.wikipedia.org /wiki/Manhole (201 words)

	Manhole sealing device - Patent 4305679
		Manhole sealing device to prevent water from entering a manhole through the corbel joint between the manhole casing and cover frame.
		A manhole sealing device comprising a flexible membrane for spanning a manhole corbel joint, means for forming a first seal between said membrane and a manhole cover frame above said corbel joint, and means for forming a second seal between said membrane and a manhole casing below said corbel joint.
		A typical manhole comprises an underground masonry casing, a cover frame resting on the top of the casing at a corbel joint and protruding through the pavement of a street or the like, and a manhole cover received in the cover frame and removable or hinged to allow access to the manhole.
	www.freepatentsonline.com /4305679.html (2063 words)

	Ruavista - Manhole Covers of London
		Manhole covers are among the urban landscape's most lasting features.
		Manhole covers offer living testimony to the industrial artistry of the second half of the 19th century as many of the covers still seen today on the sidewalks of European and North American cities date from that period.
		Manhole covers are round to prevent them from falling into the hole and breaking or injuring someone below.
	www.ruavista.com /manholeeng.htm (397 words)

	Doug Meadows Company, LLC: Manhole Cover Extractors and Manhole Risers (Site not responding. Last check: 2007-09-17)
		NOFLOW INFLOW MANHOLE INSERTS or MANHOLE DISHES, HDPE polyethylene insert that prevent sewer wastewater infiltration and flooding due to heavy rains.
		Steel Riser Rings, excellent tools for raising manhole grades during paving overlays, and for raising manhole lids or covers in general.
		ECLECTIC E6000, a component styrene rubber adhesive/sealant is used to water proof grade rings and glue the rings to either concrete or fiberglass manholes insuring a permanent installation and preventing the manhole ring from sliding loose.
	www.dougmeadows.com (135 words)

	Three Large HyperCard Stacks: A 1989 Review
		The Manhole is an interactive fiction for "children of all ages".
		The manhole (which gives the story its name) is seen at the ground level, and through it we can also see the sea level, where the beanstalk grows up from an island.
		To conclude, The Manhole is indeed enjoyable and your initial experience the first hour or so you use it will give you a good idea of the feeling of reading/participating in the open or truly large-scale interactive fictions we will probably see in the future.
	www.useit.com /papers/cdrom.html (5543 words)

	manhole-covers.net : Liens / Links
		Manhole covers are for him signs to identify places...
		The society for the Preservation of New York City Manhole Covers (SPNYCMC) was established to raise awareness of these industrial artifacts and to work for their Landmark status.
		Manhole covers of San Fransisco and Japan stimulated since long time Melnick's art works...
	www.manhole-covers.net /links.php (242 words)

	Manhole Details
		The manhole details library is made up of standard details of manholes which can be selected to the required dimensions.
		There are 6 types of manhole details currently in the library: for depths of up to 6m and pipe diameter range of 100mm to 900mm.
		The selection of this type of manhole is restricted to locations where Grade B covers are to be used.
	cig.bre.co.uk /nsdl/docs/manh_doc.htm (702 words)

	Manhole Guard Rail, Manhole Frame, Lid Lifter, Manhole Shield Ring
		Built for dependability and durability, this guard rail is fabricated from lightweight tubular steel and easily folds onto itself for compact storage and handling.
		The toughest manhole covers are easy to remove with this one-piece lid lifter.
		Designed with 4-outrigger support gussets that stabilize the shield and is 12" tall to keep water and mud out of manhole as you work.
	www.wctproducts.com /manholeguard_page.htm (308 words)

	Stop Infiltration with FlexRib Manhole Chimney Sealants
		The FlexRib Seal is made from a premium quality rubber compound which is designed to withstand the corrosive environment present in a sanitary sewer manhole.
		The grade adjustment area of a manhole is often the first part of the structure to suffer from water infiltration since weather conditions and traffic loading can quickly degrade the grade ring seals or bricked area below the frame right down to the cone.
		Depending on the manhole configuration, the FlexRib Extension can be used at the top or bottom of the sealing area.
	www.parsonenvironmental.com /flex-rib-seal.htm (724 words)

	Manhole risers, manhole rings, manhole frames, and utility lid risers - Manhole Adjustable Riser Co. Inc. (Site not responding. Last check: 2007-09-17)
		Manhole risers, manhole rings, manhole frames, and utility lid risers - Manhole Adjustable Riser Co. Inc.
		The Manhole Adjustable Riser is a patented system of interlocking cast-iron sections which bolt together to form a custom-sized manhole riser which fits into the original ring and raises the manhole cover to the level of the new surface.
		Manhole Adjustable Riser Co. provides municipal and utility lid risers for gas, water, sewer, electrical and telephone valves.
	www.manholeriser.com (194 words)

	American Highway Products - Manhole risers, Catch basins and Monument box risers
		Our American made steel manhole risers, catch basin risers and water/gas valve risers are fabricated to your specifications and are remarkably durable.
		Our Manhole Risers are famous for having a quick and powerful expanding pivoted turnbuckle.
		Manhole Protector Ring Now you can smooth over those manhole risers during road construction projects in seconds.
	www.ahp1.com (223 words)

	Bobbi Mastrangelo- Links -"The Grate Works" -transforms manhole covers, sewers and grates into artistic ...
		Manhole Covers, drains, grates - Drainspotting is all about paying attention to your surroundings.
		Manhole Covers.net All models presented here are old french manhole covers.
		Unique NYC Manhole Cover Installations by Michele Brody.- Re-Covering the Cityscape:Impressions of History Underfoot is a public art project that investigates, celebrates, and commemorates particular elements of lost New York City through the installation of a series of uniquely cast manhole covers.
	www.bobbimastrangelo.com /links.php (700 words)

	Manhole Covers Become Art (Site not responding. Last check: 2007-09-17)
		Though their function is to cover the holes in streets through which sewers, drains and other structures are reached; manhole covers have long been admired for their beauty.
		Manhole covers are also gaining popularity as lamps.
		She loves manhole covers so much; she even got involved in a public works project -- designing a series of manhole covers to commemorate some of New York City's history.
	www.voanews.com /english/2006-03-09-voa41.cfm (371 words)

	Manhole Hooks (Site not responding. Last check: 2007-09-17)
		The Condux Manhole Cover and Grate Remover is specially designed to make manhole cover and grate removal safe and easy.
		The Condux Manhole Cover and Grate Remover is adjustable for various size covers.
		The Condux Mobile Manhole Cover and Grate Remover is specially designed to make manhole cover and grate removal safe and easy.
	www.pullingrope.com /manhole_hooks.html (180 words)

	Manhole Systems, Inc. - Manhole Cover Risers
		You know that using riser rings to lift the manhole covers to grade will make your job not only easier but also better.
		You need a riser that has hung around the urban streets for many years and knows what the streets are like.
		You need it to be custom made because there are thousands of different sized manhole openings in this country.
	www.manholesystems.com (120 words)

	Manhole Covers and Drain Covers
		Manhole covers and drain covers are designed and manufactured by Peter Savage Limited.
		The company is one of the UK 's largest suppliers of manhole covers, drain covers, surface boxes, gully gratings and associated drainage products.
		The company's service record is second to none and this, backed up by extensive stocks of manhole covers and drain cover products and a flexible transport infrastructure enables Peter Savage Limited to give fast, effective, first class support to its national and international customers.
	www.peter-savage.co.uk (462 words)

	Manhole Guard - Prevent Injury
		It also becomes a visual aid for safety and helps keep any tools that may be lying on the ground near an open manhole from falling in.
		It is available in round, rectangular and square designs fitting most common manhole and storm drain applications.
		At a park, one manhole was covered with a steel plate and a bench to prevent repeated breaches.
	www.manholeguard.com (196 words)

	The Straight Dope: Why are manhole covers round?
		The commonly told story, which may even be true, is that manhole covers are round so some moron from Streets and Sanitation, or whatever it is they have out there in Glendale, won't be able to drop them accidentally into the manhole.
		(Bear in mind that there's a lip around the inside of the manhole that the cover rests on; this effectively makes the diameter of the manhole an inch or so less than that of the cover.) This means manholes are one of the few things in the universe that are absolutely goofproof.
		An equilateral triangle can be dropped into the manhole by positioning it so that one of the altitudes is parallel and close to one side of the hole (you geometry lovers know what I mean).
	www.straightdope.com /classics/a1_247a.html (530 words)

	Manhole Cutters
		A steel plate is usually placed over the manhole cone and left in place until all paving operations are completed.
		The manholes are then cut out a second time to replace the castings to the new finish elevations.
		Until now, manhole castings that needed to be replaced or repaired due to frost damage, settlement or the results of extreme traffic, had to be cut loose by the use of tiresome and expensive labor.
	www.mtnvalleyequip.com /mve_012.htm (500 words)

	No. 994: Manhole Covers
		The word manhole was first used for access holes between the decks of the old, all-male, sailing ships.
		No doubt, the first manholes in city streets were for gas lines and sewers, but their history is lost.
		There was a manhole cover I'd stepped on a thousand times before and never seen.
	www.uh.edu /engines/epi994.htm (558 words)

	ManHole.ca - Fine Sewer Art - Manhole Cover Photography
		In ManHole Languages you'll find the different ways manhole covers are referred to around the world.
		Actually, these are memories related to manhole covers; as well as trivia and reports regarding manhole covers.
		Whenever someone answers, or if they actually send in a picture of a manhole cover, they'll receive their own page in the celebrity manhole gallery (along with the picture going into the general pool).
	www.manhole.ca /trivia.htm (932 words)

	The Manhole - Wikipedia, the free encyclopedia
		The Manhole is a computer adventure game intended for children in which the player follows a rabbit down a manhole and may explore the fantastic world beneath.
		The Manhole was later also released for the PC Engine and FM Towns.
		The game was re-released for MS-DOS twice, once in 1992 by Activision as The Manhole: New and Enhanced and again in 1995 as The Manhole: CD-ROM Masterpiece Edition by Brøderbund which featured the use of color, music, voice sound effects, and some new characters.
	en.wikipedia.org /wiki/The_Manhole (224 words)

	Manhole illustration - from the politically incorrect alphabet
		Manhole illustration - from the politically incorrect alphabet
		Yes, and the substitution of 'maintenance cover' or similar for 'manhole cover' is often quoted.
		And surprise surprise, it has two, both a masculine and a feminine form.
	homepage.ntlworld.com /watson-jones/alphabet/manhole.html (174 words)

	ManHole.ca - Fine Sewer Art - Manhole Cover Photography
		Our hosting contract was terminated by Canaca.com because we had too many visitors hitting the site at the same time which apparently screws up the scripts and crashes their software.
		Any pictures are still welcome, but it will be at least three weeks (today's July 13) before the site is back up.
		Because I've been invited to participate in a movie shoot (completely manhole unrelated, but still cool) and will be out for two-three weeks...
	www.manhole.ca (430 words)

	Flickr: Photos tagged with manhole
		Since 1979, Chase has produced in-swing and out-swing manways, watertight doors and manholes...
		Prevent inflow and infiltration in manholes and catch basins with Infi-Shield seal.
		Supplier of all types of manhole duly machined as per customers specific requirements and...
	www.flickr.com /photos/tags/manhole (142 words)

	French MANHOLE COVERS - Views in Comics
		MANHOLE COVERS begann to be used in every cities at the end of the XIXth century, time of photography development too.
		To add manhole covers to scene show that the artist kows its utility, or likes its look or that the protagonist(s) need a trip in sewers to escape a danger.
		So did I search for manhole covers in comics and found some, which I let you see here, as a short catalog :
	www.manhole-covers.net /texte5gb.php (157 words)

	Shand & Jurs - Emergency Vents & Manhole Covers
		Shand and Jurs 94065 Emergency Vent and Manhole Cover Fiberglass (Pressure and Vacuum)
		Manhole opening available in 16", 20", 24",30", and 36"
		Shand and Jurs 94221 Emergency Vent and Manhole Cover (Pressure and Vacuum)
	www.ljtechnologies.com /sj/sjemergvents.htm (291 words)

	Communications From Elsewhere » Manhole
		If you live, work or attend school in Springfield, MO, there’s a manhole design contest going on for the next month.
		The winner doesn’t get their very own manhole cover (boo–they only cost $250 or so), but they will get to see their design on the storm sewer manhole covers in Springfield.
		Her father in law had forwarded the article to her, remembering that we had a manhole cover web site.
	www.elsewhere.org /journal/archives/category/manhole (400 words)

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