Use Of Steel In Building Design Construction Essay

Use Of Steel In Building Design Construction Essay Steel is a mixer from alloy which consists a lot of iron and around 0.2 % of carbon. Grade will affect the weight of it but normally it is 2.1% by weight. For iron, carbon is the most common alloying material, but it also uses other elements such as manganese, chromium, vanadium, and tungsten. Carbon and other alloying elements likes what I mentioned just now are acting as a hardening agent. From doing so, it can prevent dislocations in the iron atom crystal lattice from sliding past one another. By control the amount of alloying elements, it can indirectly control the hardness, ductility and the tensile strength of the resulting steel. By increasing the carbon content, it can be made harder and stronger than iron, but such steel is also less ductile than iron. Steel also called as a versatile material because the composition and internal structure to tailor its properties can be adjusted by us. Due to this reason, we can produce steel for paperclips, steel bridges, thin strips of st eel for razor blades and large beam for column. Properties of steel Steel more or less is a linear elastic material, it has a strong tensile strength which made it can be bend into whatever shape that you like, and it also have the same compressive as the tensile strength . It different from concrete, as we know that concrete is very low in tensile strength but it has a strong compressive strength. However, with enough applied force, steel and other metals will cease to behave elastically and begin to behave plastically. When a material is linearly elastic, its deformation, or strain, will be directly proportional to the applied force and it will return to its original shape when the force is removed. A plastic material ,on the other hand, will permanently deform without breaking. In real life, we cant found such thing as perfectly elastic or plastic material. Material likes steel, the tensile strength and the compressive strength are concerned by structural engineers. When steel reaches its yield strength, It started to stretch and transition from elastic to plastic behavior. When there is more force that applied on steel, it will made it reaches its ultimate tensile strength and eventually it will break. Due to the high tensile strength that steel has, structural engineers take this advantage in their design. In some Natural disasters likes earthquake or major structural failure, the properties which steel has is very useful because it allows the structure to absorb extra load. For those material that too brittle, it will shatter instead of stretch, it possibly will cause the structure to crash down, but for material likes steel, when the structure is ruined, but its plastic behavior allows time for escape. Advantage of steel As all engineers know, steel is very useful in construction. There are a lot of advantages of using steel in construction. That is why so many construction in the world use steel as main material. 1. Recycling Use steel in construction only will generate a small amount of waste. For all those light gauge steel construction is 100 percent recyclable. In one year, over a trillion pound of steel was recycled. According from a trustable data, it shows steel industry annually saves energy up to 18 million households for a year. 2. Strong and Durability Compare with use wood for framing work, steel is significantly stronger than wood. Other than carbon fiber, there is no other material can match steels superior strength and durability. The reason we never apply carbon fiber in our building is because carbon fiber is much more expensive compare with steel. Building that uses steel will enable the building to resist earthquake, hurricanes and other natural disease. 3. Climate and Condition As we know, steel made from strong iron and carbon, so it will never crack, shrink, splinter, creep, split, or swell. Individual members of a wood-framed building react differently to climate changes. This wood movement may include expansion, contraction, warping, twisting, etc. 4. Weigh Steels weigh is 60 percent lesser than wood. 6 tons of steel can supports 2000 square foot home, but for lumber, it needs around 20 tons to support 2000 Sf home. Although steel is light but it is very strong. Use steel for foundations can make it be lighter; transportation and site handling are easier. Problem of steel There is no perfect material in this world; each material has their strong point and week point. For steel, the most serious problem is corrosion. Due to the moisture of the air, those steel that exposed to air will get rush easily. Owner of the house have to spend a lot of money to remove those rush steel and replace it with new steel. So rather than waste a lot of money to replace after it rush, engineer had found out some way to prevent it before get rush. 1. Materials resistant to Corrosion In real life, we cant find a material that can totally immune to corrosion in all environments. To prevent corrosion, we have to know the environment factor that causes them to rush. Corrosion Resistance Date are used to assess the suitability of material in an environment. 2. Protective coating For prevent steel from corrosion, protective coatings are the most widely used technique. Protective coatings separate the surfaces of the matter that will corrode from the factors in the environment which cause corrosion to occur. Even protective coating is a common way of corrosion control technique, but it doesnt mean it can 100 percent the surface. 3. Catholic Protection There is another way to prevent corrosion from using electricity. Catholic protection interferes with the natural action of the electrochemical cells that are responsible for corrosion. For those materials which always exposed to air or water, using Catholic protection method is a very good technique. Other than the corrosion problem, steel cant resist heat as well. So when in applied in column, it needs a thick layer of cement to resist fire. From doing this, when the building is in fire, people got a lot of time to run from the building before it collapse. Uses of steel in construction work The number of building keeps increasing nowadays with help of steel components all over the world. The engineer found out that steel that is very useful in the construction work due to the ability of tensile and compressive strength. Cost of steel also affordable by client. In a building, steel parts are the most strong, most solid and reliable type of all building material that can stand the test of time. Due to the reason which is steels are firm, and cheaper compare with other material, aesthetic, fire resist, do not require further treatment and it is environmentally friendly. Advantage of steel is enough to draw attention to metal and steel components; the only issue that needs even more elaboration is their elasticity and reliability. Nowadays people do not want to be scared anymore because of their firbeboard-house or pvc houses will be sweep away by storm, tornados and other natural disasters. Reliable, solid and firm components will brings trust to user. Corrosion is one of the biggest disadvantages of metal parts used for construction though nowadays most of the manufacturers heat-treat metal parts in order they become stainless and stone-like. Heat conductivity is another problem of metal structures that is why houses are not equipped with them in full scale. Structural-Steel Columns The method of securing the ends of a column greatly influences its strength. While wooden and cast-iron columns usually occur in building construction with flat or square ends, structural-steel columns are often used, having either hinged, flat or square, and fixed ends. Where the ends are securely fixed, so that the column is likely to fail in the shaft, before the end connections are ruptured, greater strength is developed than with columns having hinged or pinned ends. Columns having flat or square ends are somewhat stronger than hinged-end columns, but not so strong as those having their ends firmly secured. Light steel framing Thin sheets of galvanized steel can be formed into steel studs used as a building material for rough-framing in commercial or residential construction (pictured), and many other applications. The dimension of the room is established with horizontal track that is anchored to the floor and ceiling to outline each room. The vertical studs are arranged in the tracks, usually spaced 16 apart, and fastened at the top and bottom. Rectangular steel frame, or perimeter frame of the Willis building (at right) contrasted against the diagrid frame at 30 St Mary Axe, London, UK. The primary shapes used in residential construction are the C-shape stud and the U-shaped track, and a variety of other shapes. Framing members are generally produced in a thickness of 12 to 25 gauge. The wall finish is anchored to the two flange sides of the stud, which varies from 1-1/4 to 3 thick, and the width of web ranges from 1-5/8 to 14. Rectangular sections are removed from the web to provide access for electrical wiring. Steel mills produce galvanized sheet steel, the base material for light-gauge steel. Sheet steel is then roll-formed into the final profiles used for framing. The sheets are zinc coated (galvanized) to prevent oxidation and corrosion. Steel framing provides excellent design flexibility due to the inherent strength of steel, which allows it to span over a longer distance than wood, and also resist wind and earthquake loads. Light Steel Framing has been extensively used in cold climate countries due to its good thermal and structural behaviour. Heat loss reduction and tenement thermal comfort have been the main driving forces defining the design of these frames. The main issue to be addressed is how striving for thermal efficiency can lead to structural weakening and poor fire performance. ( http://en.wikipedia.org/wiki/Steel_frame) Summary Steel is a very important character in construction work. It can apply in concrete, farming work, beam, column, etc. Steel strong in tensile and compressive, so when apply in column, it can help column to easily crack or damage. Compare with wood make building, steel make building allow people run away from the building when it was in fire. Steel can be totally recycled, and it will not produce any waste when it apply in construction. Talk about the advantage, steel is strong and it can last longer than any material. Carbon fiber has same properties as steel, but cost of carbon fiber is extremely expensive compare with steel. There is no perfect material in the world, even steel is good, but it can corrode anytime when I expose to air or water. Client or owner spent a lot of money for the further treatment. So rather to spend money on the further treatment, they choose to do something on it before it install. Such way like coating, material resist, and catholic protection. Conclusion Initially I choose wood as the material of the assignment, but eventually I found out that steel is more common use and its properties is very unique. Steel much more stronger than wood, lighter than wood and talk about the further treatment, woods are easily spoil, so it will waste more money. But nowadays steels are getting lesser, we have to find another material to replace it, Carbon fiber has the same properties with steel but the problem is it is very expensive compare with steel. Recycle is the best way to solve this problem. Steel can be cycle easily, we can get the source from tin, old car, old buildings beam. From doing this, we can make sure

Compare Contrast Paper

W. B Monday October 1, 2012 Compare / Contrast Essay The differences and similarities between Ramayana and Gilgamesh are very noticeable. In my opinion Ramayana and Gilgamesh are like water and wine. While they both fight battles and they are both important people in their home lands, they have totally different ways of going about life and totally different views on their power as king. â€Å"To bad as well as good, to all, A generous man compassion shows; On earth no mortal lives, he knows, Who does not oft through weakness fall. †- Ramayana.This quote to me means that all men are equal, one must show compassion towards all things because no matter what journey we take we all come to the same end. Like Gilgamesh, Ramayana was also born into a very wealthy family and destined to become king of his empire. However, unlike Gilgamesh, Ramayana was a very noble and kind hearted ruler. Ramayana was respected and loved by his people who all knew he would one day make a great king. Gilgamesh on the other hand was already king and abused his power. Instead of being a great ruler and looking out for his people, he only thought of himself.Gilgamesh made his people work very hard, and to be even worse he raped the brides on their wedding nights. â€Å"I have peered over the city wall, I have seen the corpses floating in the river’s water. So too it will come to pass for me, so it will happen to me†¦ Since no man can avoid life’s end, I would enter the mountain land and set up my name. † – Gilgamesh This quote I think best describes Gilgamesh and shows just how selfish and arrogant he is. He sees the pain and sorrow of his people and realizes that no one escapes death but instead of trying to help them out he tries to figure out a way to become immortal.Gilgamesh and Ramayana both go through battles that show their strengths. However, Gilgamesh goes searching for his battles and Ramayana’s battles are brought upon him. After being banished from his kingdom Ramayana goes to live in the forest with his wife and brother. They live in harmony and peace until the evil demon king Ravana takes away Ram’s wife Sita in revenge for Ram having disfigured Ravana’s sister. This event brings out the warrior in Ram and he goes to the end of the world to save his love. Gilgamesh’s battles are very different. They are merely battles he seeks to show off how powerful he is.Gilgamesh unlike Ram does not know what love is or how to love someone until he meets Enkidu, who is his soulmate, his equal. Gilgamesh and Enkidu both set of on journeys together to conquer evil and help Gilgamesh find immortality. In the end of his journey Gilgamesh looses Enkidu as a punishment from the gods and never reaches immortality the way he hoped, he does however turn in to a much nicer person. Ramayana on the other hand fights the battles that he is obligated too, saves his wife and also saves other prisoners of his evi l opponents. In the end he goes back home and takes back his place as the king of his empire.Ramayana and Gilgamesh though living similar lives are two very different people. A kind hearted and peace loving Ramayana only fights when he has no choice and has always known the importance of his people and his family. Where as a cold hearted, and evil Gilgamesh has to experience pain and sorrow before becoming a nicer more contentious person. All the power that Gilgamesh has makes him think he is better and above all on the other hand all the power that Ram has does nothing to him he is always a kind hearted individual. Both Ramayana and Gilgamesh end up becoming immortal in that their legends live on.They both believe in the power of the gods and that they are very important. Except Ramayana respects the gods and Gilgamesh thinks so highly of himself he believes the gods are on his side because of how strong he is until he learns the hard way that he too can be punished. The stories of Ramayana and Gilgamesh were very similar in that they both had life journeys, battles and other difficulties to overcome. The epics also show just how different both characters are even though they live through similar life events and end up the same.. dead but immortal through the passing of their stories.

Autobiography Of My Childhood - 1140 Words

I was born in Newark Ohio and came to Licking Valley in the middle of kindergarten. I am the oldest out of three children and son of Ronald and Brandy Schneider. My father is a Highway State Patrol man. By the time a was 5 my parents separated. I haven t seen my biological mother since I was 12. My mother wasn’t the best parent you could have asked for, she had a problem drinking. Even though my parents separated I still have people who love me and the best step mom you could ask for. I went to kindergarten when I was 6. I lived in Newark for a while but we had to move in the middle of the year so I showed up at Licking Valley in the middle of kindergarten. I’ve been here ever since then. Even though I didn’t have a mother until†¦show more content†¦I went to the elementary when I was 7 I went to first grade. My teacher’s name was Mrs. O brien and she was my favorite teacher. I never really got in trouble in school I was always a good kid and did what I was supposed to do. When I was 9 I switch from the little kids side of the elementary school to the bigger kids side. Also when I was nine when my dad married my step mother Tracy Schneider. That day was pretty life changing because I had a mom that would be able to teach me the things that my dad wouldn’t be able to teach me. She is teaching me and shaping me into becoming a man. It was also nice to see my dad happy. When I was in sixth grade my stepmom gave birth to my little sister Lauren. She is really crazy and spoiled because she is the girl in the family. She is only three years old and she already wants to go shopping all the time. She will be going to preschool this year, which my mom hates. I was 11 when I got stitches on my cheek. I got bit by one of my family’s dog. Which it kinda was my fault and the dog s fault. The dog’s name was Archie and he is my aunt’s dog. I went to my uncle and aunt’s house for a family gathering. 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The Forgotten How The Disabled Are Left Out Of Disaster...

Christopher Bordelon The Forgotten: How the Disabled are Left out of Disaster Preparedness Introduction to Disaster The catastrophes of Hurricane Katrina and the Indonesia Tsunami are prime examples of events that have focused our attention on the increased necessity for the analysis of risk, disaster preparedness, and hazard mitigation. These catastrophes, occurring inside the space of one year, are exceptional in not only their level of destruction but also in their level of media attention. Supplementary disasters, such as the Kobe earthquake in 1995, can exceed the death toll of a whole year in a solitary quick event. Cities like Tokyo are at an increased risk for different types of destructive events ranging†¦show more content†¦Interestingly enough, the United States disability statistics exceed 15% of the population. With time, it may be expected that the WHO’s estimate of the worldwide disabled population will grow with situational awareness and better identification of disabilities. In a detailed analysis of 9/11 survivors, a list of people with vulnerabilities include d: acute illness, trauma or recent major surgery, obesity, cardiovascular disease, pregnancy, and respiratory problems (NIST, 2005). Current events have illustrated instances in which people who are disabled fall victim to disaster. Whether these people are stranded in a high-rise construction due to a terrorist attack or fire, crushed in a collapsed building from a tsunami, swept away in flood, dying from normally treatable chronic illnesses in shelters or drowned in a hurricane fueled storm surge, people with disabilities face trials in physical mobility, mental anguish, and receipt of critical, lifesaving care. When 9/11 occurred, rescue and safety personnel risked their lives to save people with disabilities. (NIST, 2005) People who stayed at the side of the disabled workers to await rescue were broadcast across numerous news network for years. (Zelmanowitz 2002). In two cases during 9/11, guide dogs assisted victims, with one descending 71 floors of the World Trade Cente r (Hu,Show MoreRelatedExploring Corporate Strategy - Case164366 Words   |  658 Pages22/10/2007 11:54 Page 599 Guide to using the case studies The main text of this book includes 87 short illustrations and 15 case examples which have been chosen to enlarge speciï ¬ c issues in the text and/or provide practical examples of how business and public sector organisations are managing strategic issues. The case studies which follow allow the reader to extend this linking of theory and practice further by analysing the strategic issues of speciï ¬ c organisations in much greater depthRead MoreFundamentals of Hrm263904 Words   |  1056 PagesUnderstanding Cultural Environments 4 The Changing World of Technology What Is a Knowledge Worker? 6 How Technology Affects HRM Practices 6 Recruiting 7 Employee Selection 7 Training and Development 7 Ethics and Employee Rights 7 Motivating Knowledge Workers 7 Paying Employees Market Value 8 Communications 8 Decentralized Work Sites 8 Skill Levels 8 A Legal Concern 8 Employee Involvement 20 How Organizations Involve Employees 20 Employee Involvement Implications for HRM 20 Other HRM ChallengesRead MoreManaging Information Technology (7th Edition)239873 Words   |  960 PagesChapter 14 Chapter 15 517 Planning Information Systems Resources 519 Leading the Information Systems Function 536 Information Security 561 Social, Ethical, and Legal Issues 575 Glossary 668 Index 691 iii This page intentionally left blank CONTENTS Preface xvii Chapter 1 Managing IT in a Digital World 1 Recent Information Technology Trends 2 Computer Hardware: Faster, Cheaper, Mobile 2 Computer Software: Integrated, Downloadable, Social 2 Computer Networks:Read MoreLibrary Management204752 Words   |  820 Pages. . . . . . . . . . 311 Vroom’s Expectancy Theory . . . . . . . . . . . . . . . . . . . . 312 Behavior Modification . . . . . . . . . . . . . . . . . . . . . . . . . 314 Goal-Setting Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 How Should Managers Motivate? . . . . . . . . . . . . . . . . . 316 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 14—Leadership. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 What Is Leadership