Saturday, 31 January 2015

Twin towers (USA)

The World Trade Center is a partially completed complex of buildings, under construction, in Lower ManhattanNew York City,United States, replacing an earlier complex of seven buildings with the same name on the same site. The original World Trade Center featured landmark twin towers, which opened on April 4, 1973, and were destroyed in the September 11 attacks of 2001, along with 7 World Trade Center. The other buildings in the complex were severely damaged by the collapse of the twin towers, and their ruins were eventually demolished. The site is being rebuilt with six new skyscrapers, a memorial to those killed in the attacks, and atransportation hubOne World Trade Center, the tallest building in the United States, is the lead building for the new complex, reaching more than 100 stories[16] upon its completion in November 2014.[17]
At the time of their completion, the "Twin Towers" — the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center — were the tallest buildings in the world. The other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC5 WTC6 WTC, and 7 WTC. All these buildings were built between 1975 and 1985, with a construction cost of $400 million ($2,300,000,000 in 2014 dollars).[18] The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m2) of office space.[19][20]
The World Trade Center experienced a fire on February 13, 1975,[21] a bombing on February 26, 1993,[22] and a robbery onJanuary 14, 1998.[23] In 1998, the Port Authority decided to privatize the World Trade Center, leasing the buildings to a private company to manage, and awarded the lease to Silverstein Properties in July 2001.[24]
On the morning of September 11, 2001Al-Qaeda-affiliated hijackers flew two Boeing 767 jets into the complex, beginning with the North Tower at 8:46 AM then the South Tower at 9:03 AM, in a coordinated act of terrorism. After burning for 56 minutes, the South Tower collapsed at 9:59 AM. 29 minutes later, the North Tower collapsed. The attacks on the World Trade Center killed 2,753 people.[25] Falling debris from the towers, combined with fires that the debris initiated in several surrounding buildings, led to the partial or complete collapse of all the other buildings in the complex and caused catastrophic damage to ten other large structures in the surrounding area (including the World Financial Center); three buildings in the World Trade Center complex collapsed due to fire-induced structural failure,[26] and when the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging it and starting fires so that it eventually collapsed.[27][28] The process of cleaning up and recovery at the World Trade Center site took eight months.[29][30]
Over the following years, plans were created for the reconstruction of the World Trade Center. The Lower Manhattan Development Corporation (LMDC), established in November 2001 to oversee the rebuilding process,[31] organized competitions to select a site planand memorial design.[32] Memory Foundations, designed by Daniel Libeskind, was selected as the master plan;[33] however, substantial changes were made to the design.[34]
The first new building at the site was the 7 World Trade Center, which opened in May 2006.[5] The memorial section of the National September 11 Memorial & Museum opened on September 11, 2011[35] and the museum opened in May 2014.[36] 1 World Trade Center opened on November 3, 2014;[17] the 4 World Trade Center opened on November 13, 2013;[4] the 3 World Trade Center is under construction and expected to open in 2017;[37][38] As of November 2013, according to an agreement made with Silverstein Properties Inc., the 2 World Trade Center will not be built to its full height until sufficient leasing is established to make the building financially viable;[39] and 5 World Trade Center will be developed by the Port Authority of New York and New Jersey, but, as of February 2014, a schedule was not confirmed.[40]

Before the World Trade Center

The western portion of the World Trade Center site was originally under the Hudson River, with the shoreline in the vicinity of Greenwich Street. It was on this shoreline close to the intersection of Greenwich and the former Dey Street that Dutch explorerAdriaen Block's ship, the Tyger, burned to the waterline in November 1613, stranding Block and his crew and forcing them to overwinter on the island. They built the first European settlement in Manhattan. The remains of the ship were buried under landfill when the shoreline was extended starting in 1797, and were discovered during excavation work in 1916. The remains of a second ship from the eighteenth century were discovered in 2010 during excavation work at the site. The ship, believed to be a Hudson Riversloop, was found just south of where the Twin Towers used to stand, about 20 feet below the surface.[41]
Later, the area became Radio Row. New York City's Radio Row, which existed from 1921 to 1966, was a warehouse district on theLower West Side in the Financial District. Harry Schneck opened City Radio on Cortlandt Street in 1921, and eventually the area held several blocks of electronics stores, with Cortlandt Street as its central axis. The used radios, war surplus electronics (e.g., ARC-5radios), junk, and parts often piled so high they would spill out onto the street, attracting collectors and scroungers. According to a business writer, it also was the origin of the electronic component distribution business.[42]
The idea of establishing a World Trade Center in New York City was first proposed in 1943. The New York State Legislature passed a bill authorizing New York Governor Thomas E. Dewey to begin developing plans for the project[43] but the plans were put on hold in 1949.[44] During the late 1940s and 1950s, economic growth in New York City was concentrated in Midtown Manhattan. To help stimulate urban renewal in Lower Manhattan, David Rockefeller suggested that the Port Authority build a World Trade Center in Lower Manhattan.[45]
Plans for the use of eminent domain to remove the shops in Radio Row bounded by VeseyChurchLiberty, and West Streets began in 1961 when the Port Authority of New York and New Jersey was deciding to build the world's first world trade center. They had two choices: the east side of Lower Manhattan, near the South Street Seaport; and the west side, near the H&M station, Hudson Terminal.[46](p56) Initial plans, made public in 1961, identified a site along the East River for the World Trade Center.[47] As a bi-state agency, the Port Authority required approval for new projects from the governors of both New York and New Jersey. New Jersey Governor Robert B. Meyner objected to New York getting a $335 million project.[48] Toward the end of 1961, negotiations with outgoing New Jersey Governor Meyner reached a stalemate.[49]
At the time, ridership on New Jersey's Hudson and Manhattan Railroad (H&M) had declined substantially from a high of 113 million riders in 1927 to 26 million in 1958 after new automobile tunnels and bridges had opened across the Hudson River.[50] In aDecember 1961 meeting between Port Authority director Austin J. Tobin and newly elected New Jersey Governor Richard J. Hughes, the Port Authority offered to take over the Hudson & Manhattan Railroad to have it become the Port Authority Trans-Hudson (PATH). The Port Authority also decided to move the World Trade Center project to the Hudson Terminal building site on the west side of Lower Manhattan, a more convenient location for New Jersey commuters arriving via PATH.[49] With the new location and Port Authority acquisition of the H&M Railroad, New Jersey agreed to support the World Trade Center project.[51] In compensation for Radio Row business owners' displacement, the PANYNJ gave each business $3,000 each, without regard to how long the business had been there or how prosperous the business was.[46](p68) After the area had been purchased for the World Trade Center in March 1964,[52] Radio Row was demolished starting in March 1965.[53] It was completely demolished by 1966.[54]
Approval was also needed from New York City Mayor John Lindsay and the New York City Council. Disagreements with the city centered on tax issues. On August 3, 1966, an agreement was reached that the Port Authority would make annual payments to the City in lieu of taxes for the portion of the World Trade Center leased to private tenants.[55] In subsequent years, the payments would rise as the real estate tax rate increased.[56]

Palm island in dubai



The Palm Islands are two artificial islandsPalm Jumeirah and Palm Jebel Ali, on the coast of DubaiUnited Arab Emirates. As at November 2014, only Palm Jumeirah has been completed. This island takes the form of a palm tree, topped by a crescent. When complete, Palm Jebel Ali will take a similar shape; both islands will be host to a large number of residential, leisure and entertainment centres and will add a total of 520 kilometres of non-public beaches to the city of Dubai.
The creation of the Palm Jumeirah began in June 2001. Shortly after, the Palm Jebel Ali was announced and reclamation work began. A third island was planned and construction started, but this project was later remodelled and renamed to Deira Island.
The Palm Islands are artificial islands constructed from sand dredged from the bottom of the Persian Gulf by the Belgian company, Jan De Nul and the Dutch company, Van Oord. The sand is sprayed from dredging ships, guided by a Global Positioning System, onto the required area. The spraying process is known as rainbowing because of the rainbow-like arcs produced in the air when the sand is sprayed. The outer edge of each palm's encircling crescent is a large rock breakwater. The breakwater of the Palm Jumeirah contains over seven million tons of rock; each rock was placed individually by a crane, its position signed off by a diver, and given a Global Positioning System coordinate.[citation needed]
The Jan De Nul Group started working on the Palm Jebel Ali in 2001 and had finished by the end of 2006. The reclamation project for the Palm Jebel Ali includes the creation of a four-kilometer-long peninsula, protected by a 200-meter-wide, seventeen-kilometer long circular breakwater. There are 210,000,000 cubic meters of rock, sand and limestone that were reclaimed (partly originating from the Jebel Ali entrance channel dredging work). There are approximately 10,000,000 cubic meters of rocks in the Slope Protection Works.

Top 50 civil blogs

Design and Construction

If you are interested in planning projects and overseeing their completion, these blogs can help you learn more about how the whole process works.
  1. From the Ground Up: A look at civil engineering from a European perspective. Great look at design and construction.
  2. Bridging the Gap: This young civil engineer offers perspective on building in Chicago.
  3. The Constructor: Civil engineering blog offers a look at different aspects for design and construction.
  4. Land Development Engineering: A look at different aspects of land design and development.
  5. Blueprint America: A great blog on what’s happening in infrastructure design and construction.
  6. WaterSISWEB: Learn more about designing water systems and how they are constructed.
  7. Infrastructurist: A look at design and construction, and the latest trends in civil engineering and infrastructure.
  8. BLDGBLOG: This blog looks at different civil engineering design and construction issues, tools and tips.
  9. Sanitation Updates: Learn more about sanitation design from a global civil engineering perspective.
  10. The Urbanophile: Looks at city design and construction, and new ideas for the future.
  11. RoadLogic: Great insights on design and construction of roads in Ontario, Canada.
  12. NewUrbanStreets.com: A look at civil engineering from an urban perspective.
  13. The Engineering Daily: News from across all fields of engineering, including civil engineering. Informative and helpful in terms of helping civil engineers see how their field intersects with others.

Research, Planning and Policy

Before you can design and build something, you need to understand its impacts, and whether it fits where you are putting it. These blogs offer helpful insight into the research and planning that go into civil engineering projects.
  1. Our Failing Infrastructure: A look at research and public policy as it relates to our infrastructure and what can be done to improve it.
  2. FastLane: The U.S. Department of Transportation offers a look at transportation policy. A great resource for civil engineers.
  3. The Dirt: A look at the future of civil engineering, and what options we have moving forward, from a civil engineering consultant.
  4. BOSS International: Looks at different subjects related to the development of civil engineering and the future.
  5. Transportation Experts: A look at transportation planning and research into how to make our infrastructure more efficient.
  6. Infrastructure Watch: Considers infrastructure planning and research. Helps you keep up with what’s happening in the world of civil engineering.
  7. Public Works Group: A look at policy, land management and civil engineering. Great place for research and planning ideas.
  8. Project for Public Spaces: A place for civil engineers and urban policy wonks to discuss policy, share ideas and look at research related to the future.
  9. Next American City: A look at infrastructure and building policy, and full of planning ideas for the budding civil engineer.
  10. The Infra Blog: Follow policy, infrastructure research, and planning related to what keeps America going.
  11. Municipal Musings: Looks at policy related to urban planning and civil engineering.
  12. Transportation for America: Looks at civil engineering, public policy and offers research for future solutions.
  13. Goodspeed Update: Get interesting news on planning, research and the future of civil engineering in an urban environment.
  14. Peter Gordon’s Blog: Explore the connections between urban planning/civil engineering and economics. Also concerns itself with policy.

Sustainable and Green

One rapidly growing segment of civil engineering is the environmentally sustainable aspects of engineering and building. Get the latest on green civil engineering.
  1. UrbanWorkbench: Looks at how it is possible to design urban spaces in a sustainable manner. Green civil engineering at its best.
  2. The Green Civil Engineer: This civil engineer has a number of ideas on how to make our world a greener place.
  3. Sasha on the Street: This Candian’s passion is transportation — and sustainability. A great look at sustainable infrastructure.
  4. WaterWired: This “hydrophilathropist” looks at ways that civil engineering can be more water friendly.
  5. Harvesting Rainwater: Inventive and interesting ways that civil engineers are helping the environment through eco-friendly architecture.
  6. Connected Urban Development: Considers the impacts that we have on the environment and addresses urban planning and civil engineering issues.
  7. openalex: This blog on sustainable development offers insights on how we can engage in more environmentally friendly engineering.

How to become a civil engineer

Civil engineering is an exciting career with opportunities in many different areas. Some civil engineers work in the field, some work in offices doing design, and others work in a combination of the two. Here are some helpful steps to starting your career as a civil engineer.


Understand what a civil engineer does. Basically, this is the side of engineeringconcerned with designing, building, and maintaining public works.[1] Civil engineers focus on structures and facilities such as transportation routes, features (tunnels, bridges, flyovers), and hubs (such as airports and bus interchanges), water treatment (sewage, dams, pipelines, etc.) government buildings (police and fire stations, major office buildings, etc.), and other structures required on a large public scale. In some countries, such as the United States, civil engineering also involves military engineering.[2] Another way of looking at what a civil engineer does is to see it as a role of reducing complex ideas initiated 
 by policymakers, chief executives, and other such people into concrete reality.
It's a job that pays a reasonably high income due to the level of skills and expertise required, and the ongoing responsibilities to ensure safe, accurate, and enduring engineering outcomes.Understand what a civil engineer does. Basically, this is the side of engineeringconcerned with designing, building, and maintaining public works.[1] Civil engineers focus on structures and facilities such as transportation routes, features (tunnels, bridges, flyovers), and hubs (such as airports and bus interchanges), water treatment (sewage, dams, pipelines, etc.) government buildings (police and fire stations, major office buildings, etc.), and other structures required on a large public scale. In some countries, such as the United States, civil engineering also involves military engineering.[2] Another way of looking at what a civil engineer does is to see it as a role of reducing complex ideas initiated by policymakers, chief executives, and other such people into concrete reality.
  • Civil engineers can work in a variety of work environments, including in the public sector, as contractors, consultants, or even as part of a firm that undertakes work outsourced from municipalities and government. Civil engineers also work with architect firms and construction firms.[3] Throughout the lifetime of a civil engineer career, you might vary your employment circumstances considerably to work around different needs and interests; the good thing is that your qualifications will allow you much flexibility.
  • Within civil engineering there are different roles open to you. For example, in the United Kingdom, you can become an engineering technician, an incorporated engineer, or a chartered engineer. Your personal interest in where to specialize will be something to consider as you pursue your studies and the different options offered through the course, so be sure to ask what's available in your country or region.
  1. Assess your skills. Civil engineering requires good mathematics, design, and science skills.[4] In addition, having a "big picture" mentality, creativity, the ability to function as a member of a team, the ability to work without supervision and to handle high levels of responsibility, the ability to clearly and concisely communicate your ideas both verbally, and through the use of writing and images, are all important, well-rounded features to ensure a successful civil engineering career.
    • If you're still at school, appropriate subjects to focus on most include mathematics, design and technology, information technology, and physics, with economics, geography, and geology also being of help.
    • At school and during university, participate in engineering style competitions with teams, such as model bridge building competitions. These can increase your knowledge of how things work structurally and will give you a taste of how to work as a team.
    • Contact the universities offering civil engineering degrees that interest you to find out what their exact requirements are. The requirements are constantly updated to reflect new technologies and methodologies.
    • If you have already left school and haven't taken the appropriate subjects during school, you may need to undertake bridging courses or aptitude tests to prove that you're able to undertake the subjects offered in a civil engineering degree.
Choose a study program. In general, in most countries civil engineering requires a minimum of a bachelor’s degree, which will usually take about four years.[5]Depending on where you study, you may also need to take a formal certification course at the end of the degree, and in some countries, being licensed (licensure) is a prerequisite to being allowed to work or as or call yourself a "civil engineer".[6][7] Keep in mind that in order to become an engineer, there may be qualifications for your school. For example, in the United States, the bachelor program must be accredited by the Accreditation Board for Engineering and Technology, or ABET.[8]
  • Choose a program that has courses in the specific areas you are interested in. These can include design, hydraulics, construction, earthquake engineering, soil mechanics, computer methods, construction management, structural mechanics, etc.
  • Consider whether you want to take some courses outside your own country, to expand your knowledge of what is happening in civil engineering elsewhere, such as in a country that has very different geological concerns from your own. You might need to have proficiency in another language to be able to do this. Find out what's possible by talking with your university course guidance.
  • Ensure that you take courses outside of your intended field. It is possible you will find a different field that you prefer, so try to choose broadly to get a good feel for the different areas open to you within civil engineering.

Expect field trips to form a part of your degree. Being given the opportunity to apply the theory to real-life examples will help you to grasp the principles faster and will probably increase your enthusiasm for your chosen career as well.

Start thinking about how to specialize as your degree studies move on. From the start, find out all you can about the different types of civil engineering options open to you so that you're alert to what might end up being of most interest to you. Specializations might include coastal engineering, environmental issues, traffic and transportation, structural engineering, highway construction and maintenance, and so forth.


Get an internship. While in school, if it at all possible, obtain an internship in the civil field that most interests you. Most engineering firms have some type of internship program. The experience you gain is invaluable not only to helping you establish and clarify your career goals, but also in gaining valuable experience for your resume which will make you a highly desirable entry level engineer. Construction experience (internship) in your field of interest may have as much, if not more, value for your future career as a civil engineer as good results in your degree.


Join the relevant professional organization that caters for civil engineers in your country. Once you're working as a civil engineer, belonging to such an organization is the means for staying updated as to new developments, helps with yournetworking opportunities, and enables you to give back your knowledge to other engineers through seminars, etc.,

Wednesday, 28 January 2015

The Attitude of Civil Engineering Students towards Health and Safety Risk Management:

The highest rate of accidents and injuries in British industries has been reported by the construction industry during the past decade. Since then stakeholders have recognised that a possible solution would be to inculcate a good attitude towards health and safety risk management in undergraduate civil engineering students and construction professionals. Consequently, the four accreditation bodies that accredit construction degrees have improved coverage of health and safety risk management. The key issue has now shifted to ensure that Higher Education Centres deliver these requirements. This paper demonstrates innovative assessment methods that have been used to inculcate a safety conscious attitude into undergraduate civil engineering students, and to improve their knowledge of health and safety risk management. Surveys were administered to the students before and after they were subjected to innovative assessment techniques over two semesters in the construction management units. The analyses of the results of the surveys are provided to demonstrate the degree of improvement in the attitude of the students towards, and their knowledge of, health and safety risk management.

SCOPE OF CIVIL ENGINEERING IN INDIA

Engineering is one of the most important fields in the world today; and civil engineering is the one that is at the foremost and can get you a job easily. It is the oldest branch which is still one of the relevant ones. With new buildings springing up every day, there are scores of jobs for civil engineers- graduates fresh and experienced alike, can easily find a job that is to their liking. Therefore, it is not hard to believe the high demand to join for a civil engineering course today. The job aspects come from small contractors to large ones; government agencies such as PWD, etc; consultancies and what not. The top companies include Shapoorji & Pallonji, Shobha Developers, L&T, DLF; and the list is endless. The fact i understood is that ones profile must be good. Every student undergoes internship during their course and for you to be outstanding and to get an upper hand in placements it is always better to do internship abroad during your engineering course.

Most people consider civil engineering to be about building skyscrapers and bridges. But it is not that alone. It is one of the vastest subjects today and include so may aspects and specializations to it. It is not called the mother of engineering just for the heck of it.

One of the most common aspects would be construction engineering and management; in which everything regarding construction is dealt with. Various management techniques and how it is carried out are addressed. This is the aspect that people are most familiar with. People are used to civil engineers hard in hard hats holding various drawings and leading construction teams.

Structural engineering is the facet of civil engineering that has made the skyscrapers possible. Structural engineers make sure that all the elements of a building, dam, or any such structure, are strong enough to do the designated work. Transportation engineering is the part in which road design and traffic analysis are done. It is where all the basic planning for the country's transport system is done. Geotechnical engineering deals with soil and rock, and how they affect construction, and it also deals with landscaping and ground improvement. Geotechnical engineering also is used to help design and maintain tunnels and underground structures. Water resources engineering is another aspect of civil engineering which is gaining importance. It deals with anything and everything related to water. Environmental engineering has come into huge importance today due to lack of waste management and their affects on the environment.

It is no wonder that the need for civil engineers has grown considerably in the last few years thanks to the growing needs of the present generation. The scope of civil engineering is vast; with so many specializations to choose from and so many jobs to pick from. And the oldest branch is not going to go out of fashion any time soon...

SCOPE OF CIVIL ENGINEERING

Due to increase in the scope of civil engineering with the passage of time, it has now got diversified into many branches of study. Some of the significant ones include structural engineering, geotechnical engineering, transportation engineering, hydraulic engineering, environmental engineering and a few more important areas of study.
Engineers are employed by a wide range of companies in the United States, from small start up businesses focused on a new invention idea to large-scale companies that work on immense contracts. Engineers from different fields constantly work together to create successful products. When considering the design and manufacture of an aircraft, for example, the workforce behind the development will include aeronautical engineers optimizing airflow paths, analysis engineers evaluating the strength of landing gear developed by design engineers, electronics engineers developing wiring methods and pilot controls, ergonomic engineers designing comfortable seating and computer engineers programming the aircraft operation systems, including everything from the autopilot system to the cabin crew call system.
Apart from structures on land and general transportation systems, civil engineers are also responsible for building good transportation systems for flow of water, i.e. the water distribution systems. The main activities in this undertaking are designing pipelines for flow of water, drainage facilities, canals, dams, etc. Dams are a major source for non-conventional source of electricity and are hence in high demand today. While designing these structures, the civil engineers take into account the various properties of fluids to calculate the forces acting at different points.

POINTS TO REMEMBER FOR CIVIL SITE ENGINEERS

  • Lapping is not allowed for the bars having diameters more than 36 mm.
  • Chair spacing maximum spacing is 1.00 m (or) 1 No per 1m2.
  • For dowels rod minimum of 12 mm diameter should be used.
  • Chairs minimum of 12 mm diameter bars to be used.
  • Longitudinal reinforcement not less than 0.8% and more than 6% of gross C/S.
  • Minimum bars for square column is 4 No’s and 6 No’s for circular column.
  • Main bars in the slabs shall not be less than 8 mm (HYSD) or 10 mm (Plain bars) and the distributors not less than 8 mm and not more than 1/8 of slab thickness.
  • Minimum thickness of slab is 125 mm.
  • Dimension tolerance for cubes + 2 mm.
  • Free fall of concrete is allowed maximum to 1.50m.
  • Lap slices not be used for bar larger than 36 mm.
  • Water absorption of bricks should not be more than 15 %.
  • PH value of the water should not be less than 6.
  • Compressive strength of Bricks is 3.5 N / mm2.
  • In steel reinforcement binding wire required is 8 kg per MT.
  • In soil filling as per IS code, 3 samples should be taken for core cutting test for every 100m2.

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