Thursday, October 31, 2013

Different types of iron rods used in construction





An iron rod is a length of iron that is mainly used in heavy construction projects. Reinforced concrete is intertwined with iron rods, also called rebar, to strengthen the tension of the build. An iron rod can be purchased with or without a ribbed design. Construction-grade iron rods are primarily used in construction or building projects, but a wrought-iron rod can be used in various types of decorative art projects.
Iron is one of the 92 basic elements that are considered "natural," meaning they're not manmade; iron is identified by the symbol "Fe" and has an atomic number of 26. It is hardly ever found in a pure iron form, though there have been pure iron meteorites found. Iron is usually mined in the form of an oxidized or sulfide form of iron ore. The iron ore has to go through a process of reduction to be transformed into a pure metallic state. This reduction process basically takes the oxygen out of the ore and makes it pure.
Wrought iron is a fibrous metal that is soft and easily worked. It has a grainy look, almost like wood. The word "wrought" basically means “worked.” Blacksmithing is a form of iron and steel work that uses what is called a forging process. Forging is started by heating the wrought-iron rod or steel and then working it with a hammer and other tools to bend, cut and flatten the iron rod to a desired shape.
Wrought iron is produced by using a process known as smelting. The operation of smelting involves heating the iron ore with charcoal. At a proper temperature, the charcoal mixes with the oxygen and rises out of the iron as a gas. The remaining iron and slag are then removed while still hot. They are worked with a hammer, which works the iron into a consistent mass and forces out the slag.
Wrought iron is so expensive to produce that it is no longer made on a large scale; true wrought iron is now primarily used in conservation to keep historical sites authentic, and the iron is formed from recycled scrap. Most items considered wrought iron in the early 21st century are actually made of mild steel. It is still called wrought iron because it is still worked by hand. Before the switch to mild steel, wrought iron was used to make nails, rivets, chains, nuts, bolts and ornamental iron work.
Mild steel bars (as per IS: 432, part-I -1982)
Mild steel bars are used for tensile stress of RCC (Reinforced cement concrete) slab beams etc. in reinforced cement concrete work. These steel bars are plain in surface and are round sections of diameter from 6 to 50 mm. These rods are manufactured in long lengths and can be cut quickly and be bent easily without damage.
 Deformed steel bars (as per IS: 1786-1985)
As deformed bars are rods of steels provided with lugs, ribs or deformation on the surface of bar, these bars minimize slippage in concrete and increases the bond between the two materials. Deformed bars have more tensile stresses than that of mild steel plain bars. These bars can be used without end hooks. The deformation should be spaced along the bar at substantially uniform distances. 
To limit cracks that may develop in reinforced concrete around mild steel bars due to stretching of bars and some lose of bond under load it is common to use deformed bars that have projecting ribs or are twisted to improve the bond with concrete. These bars are produced in sections from 6 mm to 50 mm dia.
In addition the strength of bonds of deformed bars calculated should be 40 to 80 % higher than that of plain round bars of same nominal size. And it has more tensile stress than that of plain round bars of same nominal size.
Cold twisted deformed (Ribbed or Tor Steel Bars) bars are recommended as best quality steel bars for construction work by structural Engineer.

Various Grades of Mild Steel Bars

Reinforcement bars in accordance with standard IS No. 432 part-I can be classified into following types.   
1) Mild Steel Bars: Mild steel bars can be supplied in two grades 
     a)Mild steel bars grade-I designated as Fe 410-S or Grade 60 
     b) Mild steel bars grade-II designated as Fe-410-o or Grade 40
2) Medium Tensile Steel Bars designated as Fe- 540-w-ht or Grade 75
Grade II Mild steel bar are not recommended for use in structures located in earth quake zones subject to severe damage and for structures subject to dynamic loading (other than wind loading) such as railways and highways bridges.
Every lot or consignment of mild steel bars brought at the site of work should be tested in laboratory before use in the work. However for small work one can use mild steel bars on the basis of verifying tests results made by manufacturer in his own laboratory; which are available with supplier. 
Some of manufacturers stamped MS bars grade with their make /name and also give certification of test and grade. On the basis of the above information you can store mild steel bars grade-wise at the site of work.

Steel Bars for RCC Work 

All finished steel bars for reinforced work should be neatly rolled to the dimension and weights as specified. They should be sound, free from cracks, surface flaws, laminations, rough, jagged and imperfect edges and other defects. It should be finished in a work manlike manner. 

General precautions for steel bars in reinforcement
  • Steel bars are clear, free from loose mil scales, dust and loose rust coats of paints, oil or other coatings which may destroy or reduce bond strength.
  • Steel bars should be stored in such a way as to avoid distortion and to prevent deterioration and corrosion.   
  • Steel bars should not be clean by oily substance to remove the rust.
  • The bar is bent correctly and accurately to the size and shape as shown in drawings. 
  • If possible, the bar of full length is used.
  • Overlapping bars do not touch each other and these should be kept apart with concrete.
  •  The overlap if given should be staggered.
  • The cranks in the bar at the end should be kept in position by using spots.
  • The steel bars should not be disturbed while lying cements concrete.
  • Required cover under steel bars should be given before laying the cement concrete.  
  • No over lap is given in the bar having a diameter more than 36 mm, if required, the bar should be welded.
     
Weight of Different Steel Bars
When we want to purchase Mild steel members from the market, the shopkeeper quotes the price of steel members in weight. 
When any type of steel members for use in house construction is required, we calculate the length of steel member in feet or meter but we are ignorant about the weight of steel.  
Here are details of weight per meter for various types of steel members:-
This will help us for estimated weight and cost. It will also help at the time of purchase to avoid pilferage in weight.

65 comments:

  1. Thank you for sharing a very useful piece of information!

    ReplyDelete
  2. formal for taking weight of steel
    i.e D^2/162
    exp. 6*6/162 = .22 kg

    ReplyDelete
  3. Please what is the different between the from 8mm. To 16mm

    ReplyDelete
  4. if 6mm round bar is 22kg . what is the length of the 6mm rod that gives you 22kg?

    ReplyDelete
  5. if 6mm round bar is 22kg . what is the length of the 6mm rod that gives you 22kg?

    ReplyDelete
  6. British super alloys is one of leading Manufacturer Rolling Mill of mild steel round bars, stainless steel flat bars and ms round bars in Rajkot in Ahmedabad Gujarat in India



    For more detail click here http://britishsuperalloys.com/

    ReplyDelete
  7. does these iron gets rusted easily getting rain water on the roof over 5years

    ReplyDelete
  8. They're committed, they're priced competitively and they'll provide a top class Builders clean that not only meets, it surpasses all of your expectations. Scvdeveloper.co.uk

    ReplyDelete
  9. Is there any type of iron bar named 'turkey iron bar'????please share if you know about

    ReplyDelete
  10. They're committed, they're priced competitively and they'll provide a top class Builders clean that not only meets, it surpasses all of your expectations Aluminium Scaffolding Manufacturersin chennai.

    ReplyDelete
  11. Useful information shared..I am very happy to read this article..thanks for giving us nice info.Fantastic walk-through. I appreciate this post.I have Bookmark this webpage,I am sure I will visit this place again soon. pump foundry

    ReplyDelete
  12. If more people that write articles really concerned themselves with writing great content like you, more readers would be interested in their writings. Thank you for caring about your content. http://sshomes.info/

    ReplyDelete
  13. Thank you for some other informative website. The place else may just I get that kind of information written in such a perfect method? I have a venture that I am simply now running on, and I’ve been at the glance out for such info. buying a pre construction condo

    ReplyDelete
  14. It was a very good post indeed. I thoroughly enjoyed reading it in my lunch time. Will surely come and visit this blog more often. Thanks for sharing. pur coating

    ReplyDelete

  15. It's a pity you don't have a donate button! I'd definitely donate to this outstanding blog! I suppose for now i'll settle for book-marking and adding your RSS feed to my Google account. I look forward to fresh updates and will share this site with my Facebook group. Talk soon! aol mail sign in

    ReplyDelete
  16. I’ve been surfing online more than three hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. In my opinion, if all webmasters and bloggers made good content as you did, the web will be a lot more useful than ever before. akumal real estate

    ReplyDelete
  17. Hey what a brilliant post I have come across and believe me I have been searching out for this similar kind of post for past a week and hardly came across this. Thank you very much and will look for more postings from you. paradigmhomes.com.au

    ReplyDelete
  18. Its a great pleasure reading your post.Its full of information I am looking for and I love to post a comment that "The content of your post is awesome" Great work. Fourth Avenue Residences showroom

    ReplyDelete
  19. Interesting and amazing how your post is! It Is Useful and helpful for me That I like it very much, and I am looking forward to Hearing from your next.. Construction Debris Removal

    ReplyDelete
  20. Very efficiently written information. It will be beneficial to anybody who utilizes it, including me. Keep up the good work. For sure i will check out more posts. This site seems to get a good amount of visitors. cơ khí thành tuyết

    ReplyDelete
  21. When it comes to the production of TMT bars, the quality of steel has a vital role. Steel from superior steel manufacturing units are the best choices for making TMT bars that are meant to be used for long lasting structures.
    Good quality steel Chennai
    High quality TMT bars
    Super strong TMT bars

    ReplyDelete
  22. He or she has the capacity and machinery to dig information about the prospective tenant including his or her past rental histories property management reynella

    ReplyDelete
  23. This is such a great resource that you are providing and you give it away for free. I love seeing blog that understand the value of providing a quality resource for free. Service My Car Reading

    ReplyDelete
  24. This is very valuable information. I need to know more about corrosion resistance TMT bars.

    ReplyDelete
  25. The reason the collective mind of mankind can be so unfocused and inefficient is that everyone is opting an alternative direction with various beliefs, appetites, intentions, agendas, priorities, intelligence, strength, health, abilities, and endurance. Drone Fishing Central

    ReplyDelete
  26. This is very valuable information. I need to know more about corrosion resistance TMT bars.

    ReplyDelete
  27. Pls I need to know more about the types of reinforcement use in piling and the type of rods to be used the there uses

    ReplyDelete
  28. This is a brilliant blog! I'm very happy with the comments!.. get instagram likes free

    ReplyDelete
  29. Nice post! This is a very nice blog that I will definitively come back to more times this year! Thanks for informative post. מערכות גילוי אש נתניה

    ReplyDelete
  30. However, in regard to paving parking lots and driveways the biggest argument has mainly been about initial cost. blocktop

    ReplyDelete
  31. Cool stuff you have got and you keep update all of us. המלצות בעלי מקצוע

    ReplyDelete
  32. This is actually the kind of information I have been trying to find. Thank you for writing this information. scaffolders near me

    ReplyDelete
  33. Thanks for the information about uses of different types of rods in construction.

    For best tmt bars you can visit https://www.radhatmt.com/

    ReplyDelete
  34. A SAIL TMT Bar is a best choice for construction. The Steel Dealers and the suppliers has been important in selecting the right steel type for the work we do. Thank you for such a good information.

    ReplyDelete
  35. None of us appreciate ironing! Let's face it. That will never occur. Yet, in the event that you have a moment, perused the accompanying tips. They will assist you with sparing time and keep away from undesirable wrinkles. https://solderingironguide.com/reviews/best-flux-for-soldering/

    ReplyDelete
  36. Thanks for the blog post buddy! Keep them coming... flat roofing sheffield

    ReplyDelete
  37. To qualify to have an HSBC Advance Mortgage, you should have an HSBC Advance chequing account, the absolute minimum of $25,000 in personal deposits and investments with HSBC, as well as a residential mortgage greater than or equal to $150,000. mortgage calculator Depending upon how much you be eligible for, you can impact the amount of the loan you could need to purchase a property. canada mortgage calculator

    ReplyDelete
  38. After the desired shape has been achieved, the pipes pass through a straightening machine. They can have joints added or be connected to other pipes; threading can be added as well. The NNPC approved supplier of LSAW Steel Pipes

    ReplyDelete
  39. The change in construction materials cost in 2009 has been significant, but the real bottom line change is resulting from increased competition between contractors. Our clients who are owners openly discuss the challenges they have related to the increasing complexity and competition during the bid process. A few years ago a K-12 school construction project had 3-5 bidders, today there are 30 firms competing for the same project. شرکت آرین سازه

    ReplyDelete
  40. Your posts is really helpful for me.Thanks for your wonderful post. I am very happy to read your post. It is really very helpful for us and I have gathered some important information from this blog. Real estate in Chennai | Top Construction Company in Chennai | Best Apartment Builders in Chennai | Construction Companies in Chennai

    ReplyDelete
  41. Great blog! We at Shreeji Steel corporation deal in Steel and Structural Steel Products.Our products are used in the Construction and Industrial
    sector companies.Our product range is in extreme demand in the industry due to its unmatched quality durability and price.To know more about MS Round Bar Manufacturers in Kolkata visit - https://www.shreejisteelcorp.com/

    ReplyDelete
  42. I am unable to read articles online very often, but I’m glad I did today. This is very well written and your points are well-expressed. Please, don’t ever stop writing. anti parasite herbsanti parasitic foods

    ReplyDelete
  43. Property Digger is a search engine for property listings throughout the Arab Emirates. apartments in dubai silicon oasis

    ReplyDelete
  44. There are a lot of things to consider when finding an Auto repair shop that you can trust. Things that anyone should know that may come handy during emergency occasions. Sanitary Hose

    ReplyDelete
  45. Are you thinking of having a nicely decorated home? Well, wall painting carries most of the decoration. It is also considered one of the significant parts of the decoration. I have recently colored my home by the company Exterior house Painters near me Covington . Thanks to them for the fantastic wall color.

    ReplyDelete
  46. In the orbital welding measure, tubes/pipes are clipped set up and an orbital weld head pivots a cathode and electric bend around the weld joint to make the necessary weld.best welding bags backpacks

    ReplyDelete
  47. Such a very useful article. Very interesting to read this article.I would like to thank you for the efforts you had made for writing this awesome article, really explains everything in detail,the article is very interesting and effective.Thank you and good luck for the upcoming articles.
    resume writing services
    word problem solver
    essay writer

    ReplyDelete
  48. Nowadays, metal wall expect to recommend conventional iron utilizing more-accessible steel or weatherproof aluminum, normally with empty pickets made to look like strong 5⁄8-inch square bars. The lighter-weight boards meet up with clasp, making establishment simpler. Indeed, even created iron's exemplary shiny dark paint is updated with a more drawn out enduring, multistep powder-covering measure that significantly decreases support.

    ReplyDelete
  49. Contingent upon style, a 4-foot-tall prefab fence board in rounded aluminum runs $10 to $14 per straight foot, uninstalled. A similar board in empty steel begins at $15; in strong steel, at $84; and in cast iron, at $125.

    ReplyDelete

  50. Wow! Your content is very useful for us to provide such a good article. Do you search for queries related to coursework writing? We can offer Coursework help in the USA. Our team consists of highly qualified professionals who are capable of providing supreme quality support for research writing.

    ReplyDelete
  51. This comment has been removed by the author.

    ReplyDelete
  52. You can try the Miami welding supply to get your necessary items from one stop. They are very good and affordable service provider. To get top notch welding works, you should get the best welding machine according to your work load.

    ReplyDelete
  53. take away østerbro Dejlig middag og vin med første klasses betjening. Dog undrer det, at man finder det nødvendigt at tage 40 kr. pr. person for vand. Det trækker ned i en ellers meget vellykket aften.

    ReplyDelete
  54. Woh I enjoy your content, saved to bookmarks!!! You can get a visa on arrival Turkey and pay the e visa Turkey cost. You cɑn get your Turkey Visɑ and fill your online visa application to Turkey form. You are ready to fill out an application form in the Turkey Visa Pre-Application System.

    ReplyDelete
  55. custom boxes with logo not only some of the most attractive and suitably designed custom boxes wholesale with our state of the art processing, printing and cutting die equipment

    ReplyDelete
  56. The article you've shared here is fantastic because it provides some excellent about new construction land survey Houston,information that will be incredibly beneficial to me. Thank you for sharing that. Keep up the good work.

    ReplyDelete
  57. I am so excited to tell you that you are at the right place, and you will find an expert writer to help you in completing your homework at Do My Homework Help. Our team of professionals consists of many writers who have knowledge and expertise in different fields of education. Be it Science homework or Business homework; our professionals are experts in handling any kind of homework. The professionals at do my homework assignment Help are selected after a number of tests. We always allocate the best and most suitable writer to every homework.
    homework help for me

    ReplyDelete
  58. It is safe to say that you are as yet suspecting to call a clearing project worker in your close by region? Then, at that point, don't stress as there is no issue in employing them except for is actually a difficult situation to track down the best one which is exceptionally capable in clearing work. driveways northampton

    ReplyDelete