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Definição e significado de Construction

Definição

construction (n.)

1.a structure that has a roof and walls and stands more or less permanently in one place"there was a three-story building on the corner" "it was an imposing edifice"

2.drawing a figure satisfying certain conditions as part of solving a problem or proving a theorem"the assignment was to make a construction that could be used in proving the Pythagorean theorem"

3.the act of constructing something"during the construction we had to take a detour" "his hobby was the building of boats"

4.the commercial activity involved in repairing old structures or constructing new ones"their main business is home construction" "workers in the building trades"

5.a thing constructed; a complex entity constructed of many parts"the structure consisted of a series of arches" "she wore her hair in an amazing construction of whirls and ribbons"

6.the creation of a construct; the process of combining ideas into a congruous object of thought

7.an interpretation of a text or action"they put an unsympathetic construction on his conduct"

8.(linguistics)a group of words that form a constituent of a sentence and are considered as a single unit"I concluded from his awkward constructions that he was a foreigner"

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Merriam Webster

ConstructionCon*struc"tion (?), n. [L. constructio: cf. F. construction.]
1. The process or art of constructing; the act of building; erection; the act of devising and forming; fabrication; composition.

2. The form or manner of building or putting together the parts of anything; structure; arrangement.

An astrolabe of peculiar construction. Whewell.

3. (Gram.) The arrangement and connection of words in a sentence; syntactical arrangement.

Some particles . . . in certain constructions have the sense of a whole sentence contained in them. Locke.

4. The method of construing, interpreting, or explaining a declaration or fact; an attributed sense or meaning; understanding; explanation; interpretation; sense.

Any person . . . might, by the sort of construction that would be put on this act, become liable to the penalties of treason. Hallam.

Strictly, the term [construction] signifies determining the meaning and proper effect of language by a consideration of the subject matter and attendant circumstances in connection with the words employed. Abbott.

Interpretation properly precedes construction, but it does not go beyond the written text. Parsons.

Construction of an equation (Math.), the drawing of such lines and figures as will represent geometrically the quantities in the equation, and their relations to each other. -- Construction train (Railroad), a train for transporting men and materials for construction or repairs.

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Definiciones (más)

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Dunn Construction Group • Japan Railway Construction, Transport and Technology Agency • Japanese Construction Industry • Japanese sword construction • Jihad Construction • Knee (construction) • Kumho Engineering and Construction • Kyiv National University of Construction and Architecture • LGV construction • Laser construction • Library Services and Construction Act • List of construction trades • Lockheed Shipbuilding and Construction Company • Lugged steel frame construction • MTA Capital Construction • Manhattan Construction Company • Merkle–Damgård construction • Model construction vehicle • Modular Approach to Software Construction Operation and Test • National Committee of the Chinese Seamen and Construction Workers' Union • National Convention for Construction and Reform-Maguezi • National Convention for Construction and Reform–Mageuzi • Naval Mobile Construction Battalion • Neusis construction • New Ten Major Construction Projects • Neyman construction • No. 2 Construction Battalion • Nordic Construction Company • Object-Oriented Software Construction • Offshore construction • Orascom Construction Industries • Outline of construction • PCL Construction • Paley construction • Party of Construction and Labour • Philippine National Construction Corporation • Pinball Construction Set • Planetary surface construction • Point-to-point construction • Pre-unit construction • Public Works Construction Act • Questionnaire construction • R. v. Ron Engineering and Construction (Eastern) Ltd • Railway Construction Act • Rammed-earth construction • Reed Construction Data • Relation construction • Resource construction set • Rice-hull bagwall construction • Rinker School of Building Construction • Road construction in Houston, Texas • Roof construction • Royal Commission into the Building and Construction Industry • Safety and Health in Construction Convention, 1988 • Set construction • Shoot'Em-Up Construction Kit • Skyscraper design and construction • Sleeve (construction) • Smeg Virus Construction Kit • Social Construction of Reality • Society of Construction Arbitrators • Standard Design for Buddhist Temple Construction • Statutory construction • Steel construction • Straw-bale construction • Strähle construction • Submittals (construction) • Superintendent (construction) • TGV track construction • Taylor Woodrow Construction • Telco Construction Equipment • Telegraphic Construction • The Bard's Tale Construction Set • The Mind's Construction Quarterly • The Social Construction of Reality • Tilt up construction • Tilt-up construction • Tokyo Metropolitan Subway Construction Company • Trimmer (construction) • Trix (construction sets) • Turn Construction Unit • Turner Construction • USSR in Construction • Under Construction • Under Construction (Gentle Giant album) • Under Construction (Schugar/Schenker album) • Under Construction, Part II • Union of Construction, Allied Trades and Technicians • Union of Workers in Industry, Garages, Construction Firms, Mines and Printers • Unit construction • United States House Appropriations Subcommittee on Military Construction, Veterans Affairs, and Related Agencies • Utah Construction Company • Violin construction and mechanics • Wythoff construction

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construction (n.)





construction (n.)

industry[ClasseParExt.]


construction (n.)





Wikipedia

Construction

                   
  In large construction projects, such as this skyscraper in Melbourne, cranes are essential.

In the fields of architecture and civil engineering, construction is a process that consists of the building or assembling of infrastructure. Far from being a single activity, large scale construction is a feat of human multitasking. Normally, the job is managed by a project manager, and supervised by a construction manager, design engineer, construction engineer or project architect.

For the successful execution of a project, effective planning is essential. Involved with the design and execution of the infrastructure in question must consider the environmental impact of the job, the successful scheduling, budgeting, construction site safety, availability of building materials, logistics, inconvenience to the public caused by construction delays and bidding, etc.

Contents

  Types of construction projects

  Condo construction in Canada

In general, there are two types of construction:

  1. Building construction
  2. Industrial construction

Each type of construction project requires a unique team to plan, design, construct and maintain the project.

  Building construction

Building construction is the process of adding structure to real property. The vast majority of building construction jobs are small renovations, such as addition of a room, or renovation of a bathroom. Often, the owner of the property acts as laborer, paymaster, and design team for the entire project. However, all building construction projects include some elements in common – design, financial, estimating and legal considerations. Many projects of varying sizes reach undesirable end results, such as structural collapse, cost overruns, and/or litigation reason, those with experience in the field make detailed plans and maintain careful oversight during the project to ensure a positive outcome. The causes of these deficiencies can be complex.

Commercial building construction is procured privately or publicly utilizing various delivery methodologies, including cost estimating, hard bid, negotiated price, traditional, management contracting, construction management-at-risk, design & build and design-build bridging.

Residential construction practices, technologies, and resources must conform to local building authority regulations and codes of practice. Materials readily available in the area generally dictate the construction materials used (e.g. brick versus stone, versus timber). Cost of construction on a per square meter (or per square foot) basis for houses can vary dramatically based on site conditions, local regulations, economies of scale (custom designed homes are always more expensive to build) and the availability of skilled tradespeople. As residential construction (as well as all other types of construction) can generate a lot of waste, careful planning again is needed here.

The most popular method of residential construction in the United States is wood framed construction. As efficiency codes have come into effect in recent years, new construction technologies and methods have emerged. University Construction Management departments are on the cutting edge of the newest methods of construction intended to improve efficiency, performance and reduce construction waste.

  Industrial construction

Industrial construction, though a relatively small part of the entire construction industry, is a very important component. Owners of these projects are usually large, for-profit, industrial corporations. These corporations can be found in such industries as Infrastructure, Power Transmission & Distribution, metallurgical and material handling, medicine, petroleum, chemical, power generation, manufacturing etc. Processes in these industries require highly specialized expertise in planning, cost estimating, design, and construction. As in building and heavy/highway construction, this type of construction requires a team of individuals to ensure a successful project often undertaken by big construction companies. In the fields of architecture and civil engineering, construction is a process that consists of the building or assembling of infrastructure. Far from being a single activity, large scale construction is a feat of human multitasking. Normally, the job is managed by a project manager, and supervised by a construction manager, design engineer, construction engineer or project architect.

for the successful execution of a project, effective planning is essential. involved with the design and execution of the infrastructure in question must consider the environmental impact of the job, the successful scheduling, budgeting, construction site safety, availability of building materials, logistics, inconvenience to the public caused by construction delays and bidding, etc.

  Construction processes

  Design team

  Shasta Dam under construction in June 1942

In the modern industrialized world, construction usually involves the translation of designs into reality. A formal design team may be assembled to plan the physical proceedings, and to integrate those proceedings with the other parts. The design usually consists of drawings and specifications, usually prepared by a design team including surveyors, civil engineers, cost engineers (or quantity surveyors), mechanical engineers, electrical engineers, structural engineers, fire protection engineers, planning consultants, architectural consultants, and archaeological consultants. The design team is most commonly employed by (i.e. in contract with) the property owner. Under this system, once the design is completed by the design team, a number of construction companies or construction management companies may then be asked to make a bid for the work, either based directly on the design, or on the basis of drawings and a bill of quantities provided by a quantity surveyor. Following evaluation of bids, the owner will typically award a contract to the most cost efficient bidder.

The modern trend in design is toward integration of previously separated specialties, especially among large firms. In the past, architects, interior designers, engineers, developers, construction managers, and general contractors were more likely to be entirely separate companies, even in the larger firms. Presently, a firm that is nominally an "architecture" or "construction management" firm may have experts from all related fields as employees, or to have an associated company that provides each necessary skill. Thus, each such firm may offer itself as "one-stop shopping" for a construction project, from beginning to end. This is designated as a "design Build" contract where the contractor is given a performance specification and must undertake the project from design to construction, while adhering to the performance specifications.

Several project structures can assist the owner in this integration, including design-build, partnering and construction management. In general, each of these project structures allows the owner to integrate the services of architects, interior designers, engineers and constructors throughout design and construction. In response, many companies are growing beyond traditional offerings of design or construction services alone and are placing more emphasis on establishing relationships with other necessary participants through the design-build process.

The increasing complexity of construction projects creates the need for design professionals trained in all phases of the project's life-cycle and develop an appreciation of the building as an advanced technological system requiring close integration of many sub-systems and their individual components, including sustainability. Building engineering is an emerging discipline that attempts to meet this new challenge.

  Financial advisors

May 23, 2006
September 14, 2007 (3 months before completion)

Construction projects can suffer from preventable financial problems. Underbids ask for too little money to complete the project. Cash flow problems exist when the present amount of funding cannot cover the current costs for labour and materials, and because they are a matter of having sufficient funds at a specific time, can arise even when the overall total is enough. Fraud is a problem in many fields, but is notoriously prevalent in the construction field[citation needed]. Financial planning for the project is intended to ensure that a solid plan with adequate safeguards and contingency plans are in place before the project is started and is required to ensure that the plan is properly executed over the life of the project.

Mortgage bankers, accountants, and cost engineers are likely participants in creating an overall plan for the financial management of the building construction project. The presence of the mortgage banker is highly likely, even in relatively small projects since the owner's equity in the property is the most obvious source of funding for a building project. Accountants act to study the expected monetary flow over the life of the project and to monitor the payouts throughout the process. Cost engineers and estimators apply expertise to relate the work and materials involved to a proper valuation. Cost overruns with government projects have occurred when the contractor was able to identify change orders or changes in the project resulting in large increases in cost, which are not subject to competition by other firm as they have already been eliminated from consideration after the initial bid.[1]

Large projects can involve highly complex financial plans and often start with a conceptual estimate performed by a building estimator. As portions of a project are completed, they may be sold, supplanting one lender or owner for another, while the logistical requirements of having the right trades and materials available for each stage of the building construction project carries forward. In many English-speaking countries, but not the United States, projects typically use quantity surveyors.

  Legal aspects

  Construction along Ontario Highway 401, widening the road from six to twelve travel lanes.

A construction project must fit into the legal framework governing the property. These include governmental regulations on the use of property, and obligations that are created in the process of construction.

The project must adhere to zoning and building code requirements. Constructing a project that fails to adhere to codes will not benefit the owner. Some legal requirements come from malum in se considerations, or the desire to prevent things that are indisputably bad – bridge collapses or explosions. Other legal requirements come from malum prohibitum considerations, or things that are a matter of custom or expectation, such as isolating businesses to a business district and residences to a residential district. An attorney may seek changes or exemptions in the law governing the land where the building will be built, either by arguing that a rule is inapplicable (the bridge design will not collapse), or that the custom is no longer needed (acceptance of live-work spaces has grown in the community).

A construction project is a complex net of contracts and other legal obligations, each of which must be carefully considered. A contract is the exchange of a set of obligations between two or more parties, but it is not so simple a matter as trying to get the other side to agree to as much as possible in exchange for as little as possible. The time element in construction means that a delay costs money, and in cases of bottlenecks, the delay can be extremely expensive. Thus, the contracts must be designed to ensure that each side is capable of performing the obligations set out. Contracts that set out clear expectations and clear paths to accomplishing those expectations are far more likely to result in the project flowing smoothly, whereas poorly drafted contracts lead to confusion and collapse.

Legal advisors in the beginning of a construction project seek to identify ambiguities and other potential sources of trouble in the contract structure, and to present options for preventing problems. Throughout the process of the project, they work to avoid and resolve conflicts that arise. In each case, the lawyer facilitates an exchange of obligations that matches the reality of the project.

  Interaction of expertise

  Apartment complex under construction in Daegu, South Korea

Design, finance, and legal aspects overlap and interrelate. The design must be not only structurally sound and appropriate for the use and location, but must also be financially possible to build, and legal to use. The financial structure must accommodate the need for building the design provided, and must pay amounts that are legally owed. The legal structure must integrate the design into the surrounding legal framework, and enforce the financial consequences of the construction process.

  Procurement

Procurement describes the merging of activities undertaken by the client to obtain a building. There are many different methods of construction procurement; however the three most common types of procurement are:

  1. Traditional (Design-bid-build)
  2. Design and build
  3. Management contracting

There is also a growing number of new forms of procurement that involve relationship contracting where the emphasis is on a co-operative relationship between the principal and contractor and other stakeholders within a construction project. New forms include partnering such as Public-Private Partnering (PPPs) aka Private Finance Initiatives (PFIs) and alliances such as "pure" or "project" alliances and "impure" or "strategic" alliances. The focus on co-operation is to ameliorate the many problems that arise from the often highly competitive and adversarial practices within the construction industry.

  Traditional

This is the most common method of construction procurement and is well established and recognized. In this arrangement, the architect or engineer acts as the project coordinator. His or her role is to design the works, prepare the specifications and produce construction drawings, administer the contract, tender the works, and manage the works from inception to completion. There are direct contractual links between the architect's client and the main contractor. Any subcontractor will have a direct contractual relationship with the main contractor.

  Design and build

Construction of the Phase-1 (first two towers) of the
Havelock City Project, Sri Lanka.

This approach in Custom Home Construction has become more common in recent years in Orlando, FL, and involves the entire Custom Home Builder in the design/build process. The Custom Home Builder will be involved in all phases, early-on in the custom home build to ensure that the to complete an entire package for the customer. In some cases, the Design and Build (D & B) package can also include finding the site, arranging funding and applying for all necessary statutory consents.

The owner produces a list of requirements for a project, giving an overall view of the project's goals. Several D&B contractors present different ideas about how to accomplish these goals. The owner selects the ideas he or she likes best and hires the appropriate contractor. Often, it is not just one contractor, but a consortium of several contractors working together. Once a contractor (or a consortium/consortia) has been hired, they begin building the first phase of the project. As they build phase 1, they design phase 2. This is in contrast to a design-bid-build contract, where the project is completely designed by the owner, then bid on, then completed.

Kent Hansen pointed out that state departments of transportation (DOTs) usually use design build contracts as a way of getting projects done when states don't have the resources. In DOTs, design build contracts are usually used for very large projects.[2]

  Management procurement systems

In this arrangement the client plays an active role in the procurement system by entering into separate contracts with the designer (architect or engineer), the construction manager, and individual trade contractors. The client takes on the contractual role, while the construction or project manager provides the active role of managing the separate trade contracts, and ensuring that they all work smoothly and effectively together.

Management procurement systems are often used to speed up the procurement processes, allow the client greater flexibility in design variation throughout the contract, the ability to appoint individual work contractors, separate contractual responsibility on each individual throughout the contract, and to provide greater client control.

  Authority having jurisdiction

  Construction on a building in Kansas City, Missouri
  Construction of the Rivers Towers building in Cúcuta, Colombia.

In construction, the authority having jurisdiction (AHJ) is the governmental agency or sub-agency which regulates the construction process. In most cases, this is the municipality in which the building is located. However, construction performed for supra-municipal authorities are usually regulated directly by the owning authority, which becomes the AHJ.

During the planning of a building, the zoning and planning boards of the AHJ will review the overall compliance of the proposed building with the municipal General Plan and zoning regulations. Once the proposed building has been approved, detailed civil, architectural, and structural plans must be submitted to the municipal building department (and sometimes the public works department) to determine compliance with the building code and sometimes for fit with existing infrastructure. Often, the municipal fire department will review the plans for compliance with fire-safety ordinances and regulations.

Before the foundation can be dug, contractors are typically required to verify and have existing utility lines marked, either by the utilities themselves or through a company specializing in such services. This lessens the likelihood of damage to the existing electrical, water, sewage, phone, and cable facilities, which could cause outages and potentially hazardous situations. During the construction of a building, the municipal building inspector inspects the building periodically to ensure that the construction adheres to the approved plans and the local building code. Once construction is complete and a final inspection has been passed, an occupancy permit may be issued.

An operating building must remain in compliance with the fire code. The fire code is enforced by the local fire department.

Changes made to a building that affect safety, including its use, expansion, structural integrity, and fire protection items, usually require approval of the AHJ for review concerning the building code.

  Construction careers

  Helicopter view of the Atacama Large Millimeter/submillimeter Array (ALMA) Operations Support Facility (OSF) construction site. Credit ESO.
  Ironworkers erecting the steel frame of a new building at Massachusetts General Hospital, Boston

There are many routes to the different careers within the construction industry which vary by country. However, there are three main tiers of careers based on educational background which are common internationally:

  • Unskilled and semi-skilled – General site labour with little or no construction qualifications.
  • Skilled – On-site managers whom possess extensive knowledge and experience in their craft or profession.
  • Technical and management – Personnel with the greatest educational qualifications, usually graduate degrees, trained to design, manage and instruct the construction process.

Skilled occupations in the UK require further education qualifications, often in vocational subject areas. These qualifications are either obtained directly after the completion of compulsory education or through "on the job" apprenticeship training.[3] In the UK, 8500 construction-related apprenticeships were commenced in 2007.[4]

Technical and specialised occupations require more training as a greater technical knowledge is required. These professions also hold more legal responsibility. A short list of the main careers with an outline of the educational requirements are given below:

In 2010 a salary survey revealed the differences in remuneration between different roles, sectors and locations in the construction and built environment industry.[5] The results showed that areas of particularly strong growth in the construction industry, such as the Middle East, yield higher average salaries than in the UK for example. The average earning for a professional in the construction industry in the Middle East, across all sectors, job types and levels of experience, is £42,090, compared to £26,719 in the UK.[6] This trend is not necessarily due to the fact that more affluent roles are available however as architects with 14 or more years experience working in the Middle East earns on average £43,389 per annum, compared to £40,000 in the UK.[6] Some construction workers in the US have made more than $100,000 annually, depending on their trade.[7]

  History

  A picture of a building under construction in India

The first huts and shelters were constructed by hand or with simple tools. As cities grew during the Bronze Age, a class of professional craftsmen, like bricklayers and carpenters, appeared. Occasionally, slaves were used for construction work. In the Middle Ages, these were organized into guilds. In the 19th century, steam-powered machinery appeared, and later diesel- and electric powered vehicles such as cranes, excavators and bulldozers. Modern-day Construction involves creating awesome structures that can show the beauty and creativity of the human intellect.

  See also

  References

   
               

 

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