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	<title>Engineering Book</title>
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		<title>Robots use in rehabilitation</title>
		<link>http://engineeringbook.net/articles/robots-use-in-rehabilitation/</link>
		<comments>http://engineeringbook.net/articles/robots-use-in-rehabilitation/#comments</comments>
		<pubDate>Fri, 01 Apr 2011 13:03:26 +0000</pubDate>
		<dc:creator>Mary</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=366</guid>
		<description><![CDATA[The robot can be used for human operations in hostile environments to perform (in space, in the deep sea or on the battlefield). Or numbing for very precise actions to perform (in the industrial, household or medicine). In rehabilitation applications, the robot hand to ordinary everyday actions to perform. The robot compensates the limitation of [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://engineeringbook.net/wp-content/uploads/2011/04/robot.jpg"><img class="alignleft size-full wp-image-367" title="robot" src="http://engineeringbook.net/wp-content/uploads/2011/04/robot.jpg" alt="" width="259" height="194" /></a>The robot can be used for human operations in hostile environments to perform (in space, in the deep sea or on the battlefield). Or numbing for very precise actions to perform (in the industrial, household or medicine).<br />
In rehabilitation applications, the robot hand to ordinary everyday actions to perform. The robot compensates the limitation of the user. In addition there are three approaches:</p>
<ul>
<li>A robot that runs with the three robotic laws, as a sort of assistant to certain tasks. The technical design philosophy of such a robot assistant is equal to what is described above. The user gives commands to the assistant which he must understand and implement. This requires a &#8220;high&#8221; semantic communication between the user and the assistant. Moreover, the robot must have a good repeatable and predictable features. That is difficult in an unstructured environment.</li>
</ul>
<ul>
<li>A manipulator that no robot can be named because together with the user as an acting unit he should be considered. Task, job, planning and collision avoidance by the useing real-time. The eyes of the user and the interpretation of what he sees replace optical sensors and interpretation software. Interpretation of an image requires recognition of the environment and objects therein. This requires either a &#8220;technical software moderate&#8221; or a &#8220;human&#8221; virtual world model. Man today it is far superior. This approach gives the user free rein to his creativity as it functions in real-time spot can think and execute. Drawback is the slowness of control because the level of movement takes place and not &#8220;abstract task&#8221; level (as in the robot: make dinner). All movements should be sent with weak finger or eye movement.</li>
</ul>
<ul>
<li>The combination of robot and manipulator: A manipulator can remember and redo the tasks. Advantage is the acceleration of the movement of already learned tasks. The disadvantage is the extensive language between the user and the robot at different semantic levels (complex and simple movement task). Also the the robot must have higher mechanical precision because he lacks the feedback from the user. And also potential conflicts between the virtual world of the user and the robot.<span id="more-366"></span></li>
</ul>
<p>Post by <a href="http://www.australiastartups.com.au/user/okme">http://www.australiastartups.com.au/user/okme</a></p>
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		<title>Robotics</title>
		<link>http://engineeringbook.net/articles/robotics/</link>
		<comments>http://engineeringbook.net/articles/robotics/#comments</comments>
		<pubDate>Tue, 29 Mar 2011 11:55:06 +0000</pubDate>
		<dc:creator>Mary</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=362</guid>
		<description><![CDATA[The robotics is the science and technology of robots. It deals with the design, manufacture and application of robots. Robotics combines various disciplines such as: the mechanics, the electronics, the computer, the artificial intelligence and control engineering. Other important areas in robotics are the algebra, the programmable logic and state machines. The term robot was [...]]]></description>
			<content:encoded><![CDATA[<p>The robotics is the science and technology of robots. It deals with the design, manufacture and application of robots. Robotics combines various disciplines such as: the mechanics, the electronics, the computer, the artificial intelligence and control engineering. Other important areas in robotics are the algebra, the programmable logic and state machines.</p>
<p>The term robot was popularized with the success of the play RUR (Rossum&#8217;s Universal Robots), written by Karel Capek in 1920. In the English translation of this work, the Czech word robota, meaning forced labor, was translated into English as a robot.</p>
<p><strong>History of Robotics</strong></p>
<p>The history of robotics has been linked to the construction of &#8220;artifacts&#8221; that tried to embody the human desire to create beings in his likeness and download it work. The Spanish engineer Leonardo Torres Quevedo (GAP) (who built the first remote control for cars by telegraphy without wire, the chess machine, the first air shuttle and many other mills) coined the term &#8220;automatic&#8221; in relation to the theory of automating tasks traditionally associated with humans.</p>
<p>Karel Capek, a writer Czech, coined in 1921. the term &#8220;Robot&#8221; in his play &#8220;Rossum&#8217;s Universal Robots / RUR&#8221; from the word Czech robota , which means servitude or forced labor. Robotics is the term coined by Isaac Asimov, defining the science of robots. Asimov also created the Three Laws of Robotics . In science fiction, man has imagined the robots visiting new worlds, gaining power, or simply relieving the house work.</p>
<p><strong><br />
Classification of robots:</strong></p>
<p>According to the chronology this is the most common classification:<br />
<em>Generation 1.</em><br />
Manipulators. They are multifunctional systems with a simple mechanical control system, either manual or fixed sequence of variable sequence.<br />
<em>Generation 2.</em><br />
Robots are learning. Repeat a sequence of movements that has been previously executed by a human operator. The way to do this is through a mechanical device. The operator performs the required movements while the robot remains and stores.<br />
<em>Generation 3.</em><br />
Sensorised control robots. The controller is a computer running a program, orders and sends them to the handler to perform the necessary movements.<br />
<em>Generation 4.</em><br />
Intelligent robots. Similar to above but also have sensors that send information to the control computer on the status of the process. This allows them intelligent decision-making and control of real time processing.</p>
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		<title>Bio-fuels</title>
		<link>http://engineeringbook.net/articles/bio-fuels/</link>
		<comments>http://engineeringbook.net/articles/bio-fuels/#comments</comments>
		<pubDate>Fri, 21 Jan 2011 06:57:56 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=287</guid>
		<description><![CDATA[While bio-fuel might produce an alternative to fossil fuels, the rising cost for resources used in bio-fuels creates a new dilemma. Many poorer countries spend much of their income feeding their population and rising food costs create new shortages in the wake of more expensive foodstuffs. On the other hand, other poor countries with strong [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-thumbnail wp-image-288" title="220px-Sao_Paulo_ethanol_pump_04_2008_74_zoom" src="http://engineeringbook.net/wp-content/uploads/2011/01/220px-Sao_Paulo_ethanol_pump_04_2008_74_zoom-150x147.jpg" alt="" width="150" height="147" />While bio-fuel might produce an alternative to fossil fuels, the rising cost for resources used in bio-fuels creates a new dilemma. Many poorer countries spend much of their income feeding their population and rising food costs create new shortages in the wake of more expensive foodstuffs. On the other hand, other poor countries with strong agricultural bases benefit by a lack of competition in the international market and higher profits for their crops.<span id="more-287"></span><br />
To solve this new problem, many world leaders have proposed that fuel be produced from crops grown in areas that would produce a low yield or from crops not consumed by humans. The Wold Bank, according to a report published in 2008, states that the corn-based bio-fuel production policies of the United States helped drive food prices up nearly thirty percent while the Brazilian sugarcane-based policies did not have an appreciable effect on food prices. Critics of this report point out until more efficient technologies are developed, the law of supply and demand will likely dictate the course of public policy with some poorer countries benefiting more than others.</p>
<p>Post by <a href='http://www.kirtsy.com/user.php?login=dejanseo'>http://www.kirtsy.com/user.php?login=dejanseo</a></p>
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		<title>What is Automotive Engineering?</title>
		<link>http://engineeringbook.net/articles/what-is-automotive-engineering/</link>
		<comments>http://engineeringbook.net/articles/what-is-automotive-engineering/#comments</comments>
		<pubDate>Fri, 21 Jan 2011 06:56:17 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=284</guid>
		<description><![CDATA[During the 20th century, the automobile became our chief mode of transportation. Now, in the 21st century, automobiles are sophisticated and constantly evolving machines. Automotive engineering is the broad field of study that makes this technology and innovation possible. The core components of automotive engineering include design and performance, drivetrain engineering, engine combustion, engine tribology, [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-thumbnail wp-image-285" title="220px-Lamborghini_Countach_Engine2" src="http://engineeringbook.net/wp-content/uploads/2011/01/220px-Lamborghini_Countach_Engine2-150x150.jpg" alt="" width="150" height="150" />During the 20th century, the automobile became our chief mode of transportation. Now, in the 21st century, automobiles are sophisticated and constantly evolving machines.</p>
<p>Automotive engineering is the broad field of study that makes this technology and innovation possible. The core components of automotive engineering include design and performance, drivetrain engineering, engine combustion, engine tribology, mechanical engineering and vehicle dynamics.<span id="more-284"></span></p>
<p>Today’s automotive engineers are specialists who study a diverse array of subjects, which include aerodynamics, crash safety, handling, power generation and suspension. Some automotive engineers have a high-level focus and instead specialize in the relationships between the various components of a modern automobile.</p>
<p>Using computers and advanced software, the automotive engineer can model an entire automobile and then simulate the vehicle’s behavior. By swapping out whole components, such as engines, brakes, suspensions, tires and transmissions, the engineer can efficiently assess how those changes would affect the performance and safety of the vehicle. Engineers also use computers in the cars themselves to control various aspects of the design.</p>
<p>Our understanding of automotive technology is constantly expanding and becoming more complex. Automotive engineers and the science of automotive engineering will be at the forefront of efforts to integrate electric power and to improve safety, performance and fuel economy in the years ahead.</p>
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		<title>Aerodynamics</title>
		<link>http://engineeringbook.net/articles/aerodynamics/</link>
		<comments>http://engineeringbook.net/articles/aerodynamics/#comments</comments>
		<pubDate>Fri, 21 Jan 2011 06:54:45 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=281</guid>
		<description><![CDATA[Aerodynamics is the study of the interaction between air and moving objects. It is vital to understanding how planes and rockets fly but is also used to understand everything from how kites can stay aloft to how a baseball pitch can curve. Aerodynamics is also studied in relation to objects moving along the ground such [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-thumbnail wp-image-282" title="200px-Airplane_vortex_edit" src="http://engineeringbook.net/wp-content/uploads/2011/01/200px-Airplane_vortex_edit-150x150.jpg" alt="" width="150" height="150" />Aerodynamics is the study of the interaction between air and moving objects. It is vital to understanding how planes and rockets fly but is also used to understand everything from how kites can stay aloft to how a baseball pitch can curve. Aerodynamics is also studied in relation to objects moving along the ground such as cars or runners. Aerodynamics can also be used to study wind loads in the design of structures and to study the internal passage of air through ventilation systems and gas piping.<span id="more-281"></span></p>
<p>Most of the advances in aerodynamics have come from the study of flying vehicles and to a lesser extent, ground vehicles. With the use of testing such as wind tunnels and computer simulations, vehicles can now be designed and tested using aerodynamic principles. The ultimate goal of the use of aerodynamics in vehicle design is to improve speed, stability and efficiency. Since aerodynamics involves both air and the vehicle moving through it, researchers can study advancements from two basic approaches. First, they can try to understand how air flows around a vehicle as it moves at different speeds. Secondly, they can focus on how to design a vehicle to optimize a specific characteristic.</p>
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		<title>The Future of Robotics on Combat Fields</title>
		<link>http://engineeringbook.net/articles/the-future-of-robotics-on-combat-fields/</link>
		<comments>http://engineeringbook.net/articles/the-future-of-robotics-on-combat-fields/#comments</comments>
		<pubDate>Thu, 20 Jan 2011 13:57:53 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=277</guid>
		<description><![CDATA[The U S Army&#8217;s Future Combat Systems (FCS) is the research division for combat uses for robots. News reports cover robots already deployed in Iraq and Afghanistan as unmanned aerial vehicles. The FCS has ground robots on the battlefields now. The most portable robot is the Small Unmanned Ground Vehicle (SUGV). It was developed by [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-thumbnail wp-image-278" title="250px-New_horizons_Pluto" src="http://engineeringbook.net/wp-content/uploads/2011/01/250px-New_horizons_Pluto-150x150.jpg" alt="" width="150" height="150" />The U S Army&#8217;s Future Combat Systems (FCS) is the research division for combat uses for robots. News reports cover robots already deployed in Iraq and Afghanistan as unmanned aerial vehicles. The FCS has ground robots on the battlefields now.</p>
<p>The most portable robot is the Small Unmanned Ground Vehicle (SUGV). It was developed by Boeing and iRobot as a surveillance robot. It uses treads for locomotion and weighs less than 30 pounds. Any soldier can carry the SUGV and its remote controls in one backpack. It can be fitted with cameras, laser range finders and chemical detection systems. Its ability to travel in confided spaces such as tunnels and pipes allows the SUGV to go places the smallest of soldiers could not enter. The SUGV&#8217;s tread locomotion system also allows it to climb stairs. The Army uses it for urban warfare operations. Several US public safety organizations use them as well.</p>
<p>SUGVs protect soldiers and first responders from harm by gathering situation awareness without exposing people to the dangers of combat front lines or public safety operations such as fires, hostage situations and hazardous materials accidents.</p>
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		<title>Design engineering</title>
		<link>http://engineeringbook.net/articles/design-engineering/</link>
		<comments>http://engineeringbook.net/articles/design-engineering/#comments</comments>
		<pubDate>Tue, 29 Jun 2010 19:27:18 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/?p=242</guid>
		<description><![CDATA[The design engineering process is a guide of what steps can be taken to give the Engineer degree of direction for troubleshooting. The designers used a large number of combinations of steps and procedures of design, but you can not say there is a clear winner. The follow strict rules of design ensures no success [...]]]></description>
			<content:encoded><![CDATA[<p>The <a href="http://www.designworldonline.com/">design engineering</a> process is a guide of what steps can be taken to give the<br />
Engineer degree of direction for troubleshooting. The designers used<br />
a large number of combinations of steps and procedures of design, but you can not<br />
say there is a clear winner. The follow strict rules of design ensures no<br />
success of the project and may even inhibit the designer to the point of restricting free<br />
imagination. Despite this , it is believed that the design process is an effective means<br />
provide organized and useful results .<span id="more-242"></span><br />
The stages of the design process are:</p>
<p>Identification of the problem.</p>
<p>Preliminary ideas .</p>
<p>Improvement.</p>
<p>Analysis.</p>
<p>Decision.</p>
<p>Realization.<br />
IDENTIFICATION OF THE PROBLEM :<br />
It is important in any construction activity to give a clear definition of objectives<br />
order to have a goal towards which to direct all efforts. The identification of<br />
need of a design can be based on data from several types : statistics , interviews,<br />
historical data , personal observations , experimental data or projections<br />
concepts.<br />
To define is to set limits , is to delineate the scope of the problem and the solution is<br />
searching . Is to indicate what you want to do and where not want to go. Define a<br />
problem is the most complicated in the design process, a mistake at this point<br />
represents a huge mistake at the end.<br />
This can be achieved as follows :<br />
Understanding the problem : conducting interviews , reports.<br />
Data collection: surveys, measurements .<br />
Analyzing data : hypothesis testing , cause-effect relationships .<br />
Formulation of the problem : the best way to summarize everything found .<br />
PRELIMINARY IDEAS :<br />
Once that has been defined and fixed the problem clearly, is necessary to collect<br />
Preliminary ideas which can assimilate the concepts of design. This is<br />
probably the most creative in the design process. Since the phase<br />
problem identification only general limitations have been established , the designer<br />
you can let your imagination be free to consider any idea that comes to mind. These<br />
ideas should not be evaluated in terms of feasibility , since they are treated with the hope<br />
that a positive attitude and encourages other ideas associated with a chain reaction . The<br />
most useful way to develop preliminary ideas is the freehand drawing .<br />
IMPROVEMENT OF THE PROBLEM :<br />
The stage of development is the first step in the evaluation of the preliminary ideas and<br />
rather focuses on the analysis of the constraints. All drawings, sketches and<br />
notes are reviewed, combined and refined to obtain various reasonable solutions<br />
the problem. Should be taken into account the limitations and restrictions imposed on<br />
final design. The sketches are more useful when drawn to scale, then from them<br />
can be determined relative sizes and tolerances, and by applying geometric<br />
descriptive and analytical drawings , you can find lengths , weights , angles and shapes.<br />
These physical characteristics should be determined in the preliminary stages of design, since<br />
that may affect the final design.<br />
ANALYSIS :<br />
The analysis is part of the design that best understood in the general sense. The<br />
analysis involves the review and evaluation of a design as it relates to human factors,<br />
trade dress , resistance , operation, physical quantities and economy led to<br />
meet design requirements. Much of the formal training of engineer<br />
focus is these areas of study.<br />
In each of the generated solutions is applied to various screens to confirm<br />
comply with the restrictions imposed on the solution as well as other criteria answer.<br />
Those who fail these checks are rejected and only those that are left<br />
somehow could become viable solutions to the problem.<br />
DECISION:<br />
The decision is the stage of the design process in which the project should be accepted or<br />
rejected, in whole or in part. It is possible to develop , refine and analyze various ideas and<br />
each may offer advantages over others, but no project is widely<br />
than others. The decision on which design will be optimal for a need<br />
should be determined by specific technical expertise and real information. There is always<br />
the risk of error in any decision, but a well thought out design studies the problem<br />
such depth that minimizes the possibility of overlooking an important consideration<br />
the case in a makeshift solution .<br />
REALIZATION :<br />
The last step of the designer is to prepare and monitor the plans and specifications<br />
end- which is to build the design. In some cases, the designer also<br />
supervises and inspects the performance of your design. By submitting your design to implementation,<br />
should take into account the details of manufacture, assembly methods , materials<br />
used and other specifications. During this stage , the designer can do<br />
minor changes to improve the design , however , these changes<br />
should be negligible , unless you see an entirely new concept . In this<br />
case, the design process must return to its initial stages so that the new concept<br />
be developed, approved and presented.<br />
REFERENCES :<br />
GRECH , Pablo. Introduction to Engineering . An approach through design . Bogotá D.C.<br />
Editorial Prentice Hall. 2002<br />
Shigley , Joseph Edward. Mischke , Charles R. Mechanical Engineering Design . Mc Editorial<br />
Graw Hill. Mexico D.F. 1994.<br />
ORLOV , Engineering Design. Editorial Mir. Moscow. 1985.<br />
Earle , James H. Graphic Design in Engineering. Addison Weslwy &#8211; Iberoamericana.<br />
1990.<br />
Sampieri, Roberto Hernández. COLLADO, Carlos Fernandez. LUCIO , Pilar Baptista.<br />
Research Methodology . Mexico D.F. Editorial Mc Graw Hill. 2000.<br />
LEDESMA , Martín Mora. ORTIZ , Patricio Sepulveda. Research Methodology . Mexico<br />
D.F. . Limusa Noriega Editores. 2000.<br />
Sabino , Carlos A. The Research Process . Santa Fe de Bogota D.C. Editorial<br />
Panamericana. 1997.<br />
IEEE Publishing Services Department, &#8221; Preparation of Papers in a two column format for<br />
IEEE publications photo- off set , &#8221; Guidelines for authors of the IEEE. New York. 1983.<br />
IEEE Publishing Services Department, &#8220;Information for authors &#8221; , Instructions for authors<br />
IEEE. New York. 1983.<br />
BARAHONA, scientific methodology . Bogotá. Ipler Ed. , 1981.</p>
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		<title>&#124; 

Engineering Book</title>
		<link>http://engineeringbook.net/articles/engineering-book-20/</link>
		<comments>http://engineeringbook.net/articles/engineering-book-20/#comments</comments>
		<pubDate>Tue, 13 Apr 2010 20:01:14 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/articles/engineering-book-20/</guid>
		<description><![CDATA[Rocky economic times, green infrastructure, lean construction and helping the industry be heard were themes at the Associated General Contractors of America convention in Orlando on March 17-20. AGC has to be about &#8220;the industry, not about the politics,&#8221; says AGC&#8217;s new president, Ted Aadland, CEO of Aadland Evans Construction Inc., Portland, Ore. &#8220;We can&#8217;t [...]]]></description>
			<content:encoded><![CDATA[<div>
<div id="articleBodyText" readability="48"><!-- InstanceBeginEditable name="firstParagraph" -->
<p>Rocky economic times, green infrastructure, lean construction and helping the industry be heard were themes at the Associated General Contractors of America convention in Orlando on March 17-20.</p>
<p> <!-- InstanceEndEditable --> <!--END: div id="articleExtras" --> <!-- InstanceBeginEditable name="bodyText" -->
<p>AGC has to be about &#8220;the industry, not about the politics,&#8221; says AGC&#8217;s new president, Ted Aadland, CEO of Aadland Evans Construction Inc., Portland, Ore. &#8220;We can&#8217;t afford to be a partisan organization. We need to work with elected officials in both parties on the issues.&#8221; Aadland said AGC is like &#8220;the sleeping giant&#8221;&#8211;members can &#8220;wake up&#8221; to influence those who make codes and regulations and reach out to other construction associations to &#8220;help the industry speak as one resounding voice.&#8221;</p>
<p>Collaborative activities like a coalition with the manufacturing and energy sectors were among the highlights called out by J. Doug Pruitt, chairman and CEO of Sundt Construction, Phoenix, as he looked back at his past year as AGC president. On March 17, AGC signed a partnership agreement with the Manufacturing Institute, an affiliate of the National Association of Manufacturers, to advocate for alternative pathways to graduation for the nation&#8217;s at-risk youth among other efforts. &#8220;We have to be loud and vocal,&#8221; Pruitt said.</p>
<p>The next generation of employees will expect companies to have environmentally friendly practices, said Jan Berman, president of MechoShade Systems Inc., New York City. In one of several panels addressing green issues, he noted that just as the Americans With Disabilities Act transformed from being an added factor to being integral in design and construction, so will Leadership in Energy and Environmental Design standards.</p>
<p>Scott Snelling, a bridge engineer with New York City-based Hardesty and Hanover, noted national efforts under way to create LEED-like rating systems for bridges and roads. Dominique Lueckenhoff, head of the Water Protection Division/Office of Watersheds for the Environmental Protection Agency&#8217;s Region 3, told attendees that the global market for environmental products and services is projected to double from $1.37 billion a year to $2.74 billion by 2020.</p>
<p>In the current economic climate, the conference included workshops on how contractors can avoid work stoppage and payment delays with owners and pursue strategies for recovering money if an owner defaults on a project. Because lien laws vary by state, contractors should adopt problem-avoidance strategies in drafting contracts and managing risk, said Holland &#038; Knight&#8217;s Stephen Shapiro. Those include careful preparation of payment applications, insisting on proof of owner financing and enforcing contract provisions.</p>
<p>The scramble for work can lead contractors to let their guard down, but they need to be even more vigilant now to assure they will be paid for their work, says Robert Burns, an attorney and partner with Stinson Morrison Hecker LLP, Wichita, Kan.</p>
<p>The convention, which drew 2,400 attendees, included the second session of AGC&#8217;s newly formed Lean Construction Forum. Chairman Chuck Greco, CEO of Houston-based Linbeck Group, said the multidisciplinary forum is working on a curriculum for teaching lean construction techniques that involves 92 hours of instruction and bronze, silver and gold levels of certification. The forum&#8217;s next session will be at the AGC Building Division meeting on June 9-12 in Midway, Utah.</p>
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		<title>&#124; 

Engineering Book</title>
		<link>http://engineeringbook.net/articles/engineering-book-19/</link>
		<comments>http://engineeringbook.net/articles/engineering-book-19/#comments</comments>
		<pubDate>Tue, 13 Apr 2010 20:01:14 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

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		<description><![CDATA[The project will rebuild the Congress Parkway interchange, which connects Interstate 290 to the north-south leg of Chicago&#8217;s Wacker Drive, the double-decker downtown artery made famous in the movie &#8220;The Blues Brothers.&#8221; After opening the initial round of bids from three prominent Chicago contractors on Feb. 11, the city disqualified two, then rejected the third [...]]]></description>
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<p>The project will rebuild the Congress Parkway interchange, which connects Interstate 290 to the north-south leg of Chicago&#8217;s Wacker Drive, the double-decker downtown artery made famous in the movie &#8220;The Blues Brothers.&#8221;</p>
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<p>After opening the initial round of bids from three prominent Chicago contractors on Feb. 11, the city disqualified two, then rejected the third for being too expensive. The lowest bid, at $73 million, came from a joint venture of F.H Paschen and Cabo Construction Corp. That bid was rejected because the company submitted a bid deposit of $50,000 instead of the required 5%, or $3.6 million. The city engineer&#8217;s estimate was about $100 million.</p>
<p>The next-lowest bid, $78 million, was submitted by James McHugh Construction Co. The bid was rejected, says Shannon Andrews, spokeswoman for Chicago&#8217;s Dept. of Procurement Services, because McHugh didn&#8217;t sign a required affirmative-action compliance plan.</p>
<p>The remaining bid, $85 million, came via Walsh Construction Co. The city rejected all three. Walsh subsequently filed a lawsuit claiming it should have been declared the winner, but the city&#8217;s rejection of all three bids eliminated the basis for the legal action. The contractors have either not returned ENR&#8217;s phone calls or declined to comment.</p>
<p>On April 3, the city will open new bids and expects to award the project shortly thereafter. Work on the two-year reconstruction is expected to begin sometime in June. Rebuilding the interchange will reconfigure ramps to make traffic flow more smoothly and safely. It will also create 3 acres of new green space.</p>
<p>Wacker Drive is a two-level viaduct whose upper level provides six lanes of normal traffic at street level. Its lower level offers express travel for through traffic and access to area buildings for delivery vehicles. Intermittent, center-lane ramps connect the upper and lower levels. About 60,000 vehicles use the drive daily. It is home to a number of Chicago landmarks, including the Willis (formerly Sears) Tower.</p>
<p>Reconstructing the Congress interchange is one of three major projects that together will completely rebuild 1.2 mi of Wacker Drive&#8217;s 55-year-old, north-south leg. Its east-west leg was rebuilt in 2002 at a cost of about $200 million. The north-south rebuild is funded for $366 million.</p>
<p>The other two phases will rebuild both levels of the road, add more than a foot of overhead clearance to the lower level, separate the lower level&#8217;s through-traffic lanes from the delivery lanes, improve utilities throughout the corridor and replace many of the center ramps with landscaped medians at street level.</p>
<p>T.Y. Lin International designed the new interchange. Alfred Benesch &#038; Co. is designing the first section of Wacker Drive that will be reconstructed. A designer for the second half of the new Wacker Drive has not yet been named.</p>
<p>Chicago Dept. of Transportation says it expects to bid out relocation of underground utilities in April or May of this year, with the work lasting until the end of the year. Bids to reconstruct the northern half of the Wacker Drive project will be solicited this September or October, says Andrews, with work starting in January 2011 and continuing for a year.</p>
<p>No bid date has been set for the contract to reconstruct the southern half of the Wacker Drive project, but the work is expected to run through all of 2012.</p>
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		<title>&#124; 

Engineering Book</title>
		<link>http://engineeringbook.net/articles/engineering-book-18/</link>
		<comments>http://engineeringbook.net/articles/engineering-book-18/#comments</comments>
		<pubDate>Tue, 13 Apr 2010 20:01:14 +0000</pubDate>
		<dc:creator>Mark</dc:creator>
				<category><![CDATA[Articles]]></category>

		<guid isPermaLink="false">http://engineeringbook.net/articles/engineering-book-18/</guid>
		<description><![CDATA[The University of Nevada, Las Vegas, claims that a three-year-old student recreation facility at its main campus fails to meet some seismic requirements under the 2002 Uniform Building Code. The structure remains open, but a warning notice is posted. Designed by the Phoenix office of DMJM Design, a unit of AECOM, with St. Louis-based Hastings+Chivetta [...]]]></description>
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<p>The University of Nevada, Las Vegas, claims that a three-year-old student recreation facility at its main campus fails to meet some seismic requirements under the 2002 Uniform Building Code. The structure remains open, but a warning notice is posted.</p>
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<p>Designed by the Phoenix office of DMJM Design, a unit of AECOM, with St. Louis-based Hastings+Chivetta Architects Inc., the building is likely to end up in court. Bennett &#038; Jimenez Inc., Las Vegas, which has since shut down, was the structural engineer. Phoenix-based Kitchell Contractors was the construction manager at-risk under a $43.9-million guaranteed-maximum-price contract.</p>
<p>The 70-ft-tall, steel-moment framed structure has an aluminum-framed glass curtain wall, 10-ft roof cantilever overhangs, 100-ft clear spans and bow-tie roof trusses. It&#8217;s sheathed in a combination of block, glass, precast and metal panels.</p>
<p>Roof leaks and cracked and buckling floor tiles have also been a problem. The university has since solicited request-for-proposals for building design and repair costs, which will be included as part of the seismic repair&#8217;s scope of work.</p>
<p>On Feb. 8, Kitchell and UNLV signed a binding arbitration agreement over cost overruns related to re-manufacturing new structural steel, among other things. Kitchell had sought $9 million; it got $2.7 million.</p>
<p>In 2008, the university hired structural engineer Filip C. Filippou, and he produced a report. &#8220;Because of the choice of a flexible structural system for resisting lateral forces, the displacements are relatively large,&#8221; says Filippou. He blames the &#8220;incompatibility&#8221; between the flexible and rigid structural components for the problem.</p>
<p>&#8220;We feel&#8230;we were the victim of severe professional malpractice&#8221; by the design team, says Richard Linstrom, vice president and counsel for UNLV.</p>
<p>AECOM says it&#8217;s trying to solve the problem. &#8220;We have on multiple occasions offered our assistance to UNLV in resolving the issues they have faced on this project, and we remain willing to assist,&#8221; says AECOM&#8217;s spokesman in an e-mail statement. &#8220;However, we do not agree with all of UNLV&#8217;s assertions.&#8221;</p>
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