The term business driver has largely become a management buzzword to refer to any important part of a business. The business drivers for a software company might be superior products, technological innovation, excellent marketing and ongoing customer support. A professional truck driver is all of the above, and more. You see, professional truck drivers shouldn't even be called that. They should simply be called 'professional drivers.' Because being a professional driver has nothing to do with the type of vehicle a person is driving, and everything to do with the mentality of the driver.
A pile driver is a device used to drive piles into soil to provide foundation support for buildings or other structures. The term is also used in reference to members of the construction crew that work with pile-driving rigs.
Most of the drivers I encountered hire and insure their vans through the company. Two shifts a week, at £122 a shift, barely covers the outlay. Three shifts would just scrape it, but I rarely get.
One type of pile driver uses a weight placed between guides so that it can slide vertically. It is placed above a pile. The weight is raised, which may involve the use of hydraulics, steam, diesel, or manual labour. When the weight reaches its highest point it is released, and hits the pile, driving it into the ground.
History[edit]
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There are a number of claims to the invention of the pile driver. A mechanically sound drawing of a pile driver appeared as early as 1475 in Francesco di Giorgio Martini's treatise Trattato di Architectura.[1] Also, several other prominent inventors — James Nasmyth (son of Alexander Nasmyth), who invented a steam-powered pile driver in 1845,[2] watchmaker James Valoué,[3]Count Giovan Battista Gazzola,[4] and Leonardo da Vinci[5] — have all been credited with inventing the device. However, there is evidence that a comparable device was used in the construction of Crannogs at Oakbank and Loch Tay in Scotland as early as 5000 years ago.[6] In 1801 John Rennie came up with a steam piledriver in Britain.[7]Otis Tufts is credited with inventing the steam pile driver in the United States.[8]
Types[edit]
Ancient pile driving equipment used human or animal labor to lift weights, usually by means of pulleys, then dropping the weight onto the upper end of the pile. Modern piledriving equipment uses various methods to raise the weight and guide the pile.
Diesel hammer[edit]
A modern diesel pile hammer is a large two-stroke diesel engine. The weight is the piston, and the apparatus which connects to the top of the pile is the cylinder. Piledriving is started by raising the weight; usually a cable from the crane holding the pile driver — This draws air into the cylinder. Diesel fuel is injected into the cylinder. The weight is dropped, using a quick-release. The weight of the piston compresses the air/fuel mixture, heating it to the ignition point of diesel fuel. The mixture ignites, transferring the energy of the falling weight to the pile head, and driving the weight up. The rising weight draws in fresh air, and the cycle continues until the fuel is depleted or is halted by the crew.
From an army manual on pile driving hammers:The initial start-up of the hammer requires that the piston (ram) be raised to a point where the trip automatically releases the piston, allowing it to fall. As the piston falls, it activates the fuel pump, which discharges a metered amount of fuel into the ball pan of the impact block. The falling piston blocks the exhaust ports, and compression of fuel trapped in the cylinder begins. The compressed air exerts a pre-load force to hold the impact block firmly against the drive cap and pile. At the bottom of the compression stroke, the piston strikes the impact block, atomizing the fuel and starting the pile on its downward movement. In the instant after the piston strikes, the atomized fuel ignites, and the resulting explosion exerts a greater force on the already moving pile, driving it further into the ground. The reaction of the explosion rebounding from the resistance of the pile drives the piston upward. As the piston rises, the exhaust ports open, releasing the exhaust gases to the atmosphere. After the piston stops its upward movement, it again falls by gravity to start another cycle.
Vertical travel lead systems[edit]
Vertical travel leads come in two main forms: spud and box lead types. Box leads are very common in the Southern United States and spud leads are common in the Northern United States, Canada and Europe.
Hydraulic hammer[edit]
A hydraulic hammer is a modern type of piling hammer used instead of diesel and air hammers for driving steel pipe, precast concrete, and timber piles. Hydraulic hammers are more environmentally acceptable than older, less efficient hammers as they generate less noise and pollutants. In many cases the dominant noise is caused by the impact of the hammer on the pile, or the impacts between components of the hammer, so that the resulting noise level can be similar to diesel hammers.
Hydraulic press-in[edit]
Hydraulic press-in equipment installs piles using hydraulic rams to press piles into the ground. This system is preferred where vibration is a concern. There are press attachments that can adapt to conventional pile driving rigs to press 2 pairs of sheet piles simultaneously. Other types of press equipment sit atop existing sheet piles and grip previously driven piles. This system allows for greater press-in and extraction force to be used since more reaction force is developed. The reaction-based machines operate at only 69 dB at 23 ft allowing for installation and extraction of piles in close proximity to sensitive areas where traditional methods may threaten the stability of existing structures.
Such equipment and methods are specified in portions of the internal drainage system in the New Orleans area after Hurricane Katrina, as well as projects where noise, vibration and access are a concern.
Vibratory pile driver/extractor[edit]
Vibratory pile hammers contain a system of counter-rotating eccentric weights, powered by hydraulic motors, and designed so that horizontal vibrations cancel out, while vertical vibrations are transmitted into the pile. The pile driving machine positioned over the pile with an excavator or crane, and is fastened to the pile by a clamp and/or bolts. Vibratory hammers can drive or extract a pile. Extraction is commonly used to recover steel 'H' piles used in temporary foundation shoring. Hydraulic fluid is supplied to the driver by a diesel engine-powered pump mounted in a trailer or van, and connected to the driver head via hoses. When the pile driver is connected to a dragline excavator, it is powered by the excavator's diesel engine. Vibratory pile drivers are often chosen to mitigate noise, as when the construction is near residences or office buildings, or when there is insufficient vertical clearance to permit use of a conventional pile hammer (for example when retrofitting additional piles to a bridge column or abutment footing). Hammers are available with several different vibration rates, ranging from 1200 vibrations per minute to 2400 VPM. The vibration rate chosen is influenced by soil conditions and other factors, such as power requirements and equipment cost.
Piling rig[edit]
A piling rig is used in foundation projects which require drilling into sandy soil, clay, silty clay, and similar environments. Such rigs can be equipped with a short screw (for dry soil), rotary bucket (for wet soil) or core drill (for rock), along with other options. Expressways, bridges, industrial and civil buildings, diaphragm walls, water conservancy projects, and slope protection are all projects which may require piling rigs.
Environmental effects (offshore pile driving)[edit]
The underwater sound pressure caused by pile-driving may be deleterious to nearby fish.[9][10] State and local regulatory agencies manage environment issues associated with pile-driving.[11] Noise limit is 160 dB SEL at 750 m (820.21 yd). Mitigation methods include bubble curtains, balloons, internal combustion water hammers etc.[12]
See also[edit]
References[edit]
- ^Ladislao Reti, 'Francesco di Giorgio Martini's Treatise on Engineering and Its Plagiarists', Technology and Culture, Vol. 4, No. 3. (Summer, 1963), pp. 287–298 (297f.)
- ^Hart-Davis, Adam (3 April 2017). Engineers. Dorling Kindersley Limited. ISBN9781409322245 – via Google Books.
- ^Science & Society Picture Library Image of Valoué's design
- ^Pile-driver Information on Gazzola's design
- ^Leonardo da Vinci — Pile Driver Information at Italy's National Museum of Science and Technology
- ^History Trails: Ancient Crannogs from BBC's Mysterious Ancestors series
- ^Fleming, Ken; Weltman, Austin; Randolph, Mark; Elson, Keith (25 September 2008). Piling Engineering, Third Edition. CRC Press. ISBN9780203937648 – via Google Books.
- ^Hevesi, Dennis (July 3, 2008). 'R. C. Seamans Jr., NASA Figure, Dies at 89'. New York Times. Retrieved 2008-07-03.
His great-great-grandfather Otis Tufts constructed the first steam-operated printing press in the United States and invented the steam pile driver.
- ^Halvorsen, M. B., Casper, B. M., Woodley, C. M., Carlson, T. J., & Popper, A. N. (2012). Threshold for onset of injury in Chinook salmon from exposure to impulsive pile driving sounds. PLoS ONE, 7(6), e38968.
- ^Halvorsen, M. B., Casper, B. M., Matthews, F., Carlson, T. J., & Popper, A. N. (2012). Effects of exposure to pile-driving sounds on the lake sturgeon, Nile tilapia and hogchoker. Proceedings of the Royal Society of London B: Biological Sciences, 279(1748), 4705-4714.
- ^'Fisheries – Bioacoustics'. Caltrans. Retrieved 2011-02-03.
- ^'Noise mitigation for the construction of increasingly large offshore wind turbines'(PDF). Federal Agency for Nature Conservation. November 2018.
External links[edit]
| Wikimedia Commons has media related to Pile driver. |
Both Ridgid and Ryobi are well-known power tool brands used by tens of thousands of handymen all over the world. That said, there are considerable differences between them that could sway you in either direction depending on your situation.
In this article, I will take a closer look at the history, quality, as well as product portfolios of the two brands to help you choose the right one for you.
A Brief History of Ridgid and Ryobi
Ryobi began as Ryobi Seisakusho Co. Ltd. 1943 in Japan. By 1961, the company started manufacturing offset printing presses. The production of power tools began in 1968. The company was renamed to Ryobi in 1973.
Ridgid, on the other hand, is even older than Ryobi. Founded in 1923 in North Ridgeville, Ohio, the Ridgid Tool Company manufactured Ridgid hand tools, which became popular because of their durability and ease of use. The company moved to Elyria, Ohio, in 1943, and became a subsidiary of Emerson Electric in 1966.
Ryobi runs 12 manufacturing facilities across six countries, and launched production in Shelbyville, Indiana, in 1985. Ryobi power tools are manufactured by Techtronic Industries which is headquartered in Hong Kong.
Interestingly, the same company also manufactures tools for Ridgid, as well as Milwaukee, Dirt Devil, and Vax. Ryobi power tools are mainly sold through Home Depot and online in the United States and Canada.
Long Story Short…Ridgid
Ridgid is an American power tool brand offering a wide variety of products and dating back all the way to 1923.Shop Ridgid on AmazonLong Story Short…Ryobi
A Japanese brand producing entry-level power tools and gardening equipment. Its signature green products are of great quality for home use.Owner Op Vs Company Driver
Shop Ryobi on AmazonRidgid vs. Ryobi: Which Offers Better Quality?
Both Ryobi and Ridgid offer quality products, with Ridgid being an established name in hand tools, but a relative newcomer to manufacturing power tools. In general, red Ridgid tools are made by Emerson in the US and orange Ridgid tools are manufactured by TTI in China.
Ridgid, and particularly its red US-made tools, have a strong reputation amongst professionals.
On the other hand, Ryobi has built a reputation as an affordable tool brand targeting DIYers, homeowners, and enthusiasts. While many professionals use Ryobi tools, some refuse to use it due to their perception of it being a DIY tool brand.
While it is true that Ryobi is more of a consumer brand, it can also be used by pros. Ryobi’s 18V One+ cordless power tool lineup has a selection of tools that work well for even tougher jobs.
Which Offers a Better Warranty?
The warranty provided by the manufacturer can be an important factor in your purchase. Ridgid products come with a three-year limited manufacturer warranty. Ridgid also offers an industry-leading Lifetime Service Agreement for its power tools as part of a promotional program.
Lease Purchase Vs Company Driver
Eligible categories for the Ridgid LSA include Ridgid brand cordless power tools, corded power tools, tile saws, bench and stationary power tools, and pneumatic products. If your tool is registered within 90 days, the Lifetime Service Agreement gives, under certain conditions, you free parts, free service, and free batteries for life.
The warranty covers parts such as chucks, motors, switches, gears, batteries, and even O-rings, piston stops, and driver blades. Getting these parts replaced is as simple as calling their dedicated helpline and registering a service request.
You can also get your power tools repaired or serviced at the nearest service center which can be located online.
While Ryobi offers the industry-standard three-year limited warranty on all power tools, it also has a 90-day exchange policy for peace of mind. To get your tool repaired, you must return the power tool to an Authorized Service Center.
When requesting warranty service, you must also present proof of purchase documentation, which includes the date of purchase.
Ryobi will repair any faulty workmanship, and either repair or replace any defective part within 90 days or less.
Overall, while both manufacturers offer decent warranties, Ridgid’s Lifetime Service Agreement makes it a no-brainer if your products can qualify for the promotion. If anything fails or breaks down in the future, you can rest assured that the company will take care of the problem.
Ridgid vs. Ryobi: Which Has a Better Product Portfolio?
Ryobi has a large product portfolio of 18V ONE+ power tools and accessories. Its catalog consisting of hundreds of power tools such as drills, blowers, foggers, drivers, work lights, and more.
The company has 13 drivers and drills which can be purchased as combo kits as well. It also offers plumbing, woodworking, chemical sprayers, vacuums, gardening equipment, and chemical sprayers.
Ryobi’s 40V product line may not be as extensive as its 18V One+ line, but it includes lawnmowers, pole saws, chain saws, leaf mulchers and several other gardening related equipment.
On the other hand, Ridgid has a variety of almost over thirty different 18V power tools, including wet/dry vacuums, nailers, grinders, circular saws, impact drivers, rotary hammers, blowers, radios, and fans.
Lease Operator Vs Company Driver
Ridgid’s catalog is smaller than Ryobi’s, giving Ryobi a significant edge in terms of variety and options.
Lease Driver Vs Company Driver
Which Brand Offers a Better Selection of Cordless Tools?
Ridgid has a large offering of cordless power tools, including more than forty different 18V cordless tools. These include saws, drills, impact drivers, angle grinders, routers, vacuums, rotary hammers, and several other power tools.
Meanwhile, Ryobi has an extensive product portfolio with an even larger number of cordless tools, edging out Ridgid in this category.
Which of the Two Brands Should You Choose?
If you are starting out as a DIYer, woodworker, hobbyist, or need some tools for jobs around the house, Ryobi is a great choice. If you decide to only buy Ryobi products, you’ll find pretty much everything you need for any DIY job you can conceive.
On the other hand, if you’re a professional looking for a set of tools that will last you a long time and give a trouble-free performance, definitely go with Ridgid. That’s especially the case if the tools you buy are covered under the Lifetime Service Agreement.
Summary
As you can see above, you can’t go wrong by choosing either brand. They both make quality products more than adequate for their price and they offer great selection of tools ranging from drills through sanders and grinders all the way to lawnmowers in Ryobi’s case.
With that, your ultimate choice will come down to your budget as well as overall personal preference.