Steel reinforcement for house construction

Steel reinforcement for house construction

Steel reinforcement

In civil engineering, it is mostly referred as reinforcements or rebar and as discussed in earlier blogs about cement sand and bricks, it is another crucial material required during grey structure construction of house. Steel is used in form of meshes to strengthen and hold concrete together. Without reinforcements, concrete cannot sustain heavy tension since it has weak tensile strength. Rebar is usually manufactured in two grades for domestic utilisation in Pakistan where the grade indicates its minimum yield strength:

-Grade 40

-Grade 60

Rebar used in construction of houses is further classified as:

-Deformed

-Tor bar

Deformed bars are mostly used in all type of reinforcements such as in lintels, slabs etc. in domestic residential constructions in following sizes:

reinforcement in lanter steel in slab

Some of the most reputable brands of steel used in Pakistan are:

  1. Ittefaq
  2. Ittehad
  3. Model
  4. Saeed kasur
  5. Mughal
  6. Amreli
  7. Izhar
  8. Pak steel

Always use branded steel during construction of your house. There are many other local mills that produce rebar and are available at cheaper rates. It will be wise to stay away as there should be made no structural compromise at any stage of construction.

Quantity check on site

Steel is purchased and offloaded on sites in bulks of tons, hence it becomes difficult and a little complicated to perform quantity check on site. Purchase from reputable dealers and avoid street wandering agents just like the case in cement. It has daily-based rates which vary. Many fraudulent dealers will offer a lower price as compare to market rate, which they later recover during weighing process and a layman will not be able to notice the damage. Stay alert during weighing process even if you are buying from reputable dealer and when the steel is being transported from store to your site. However if you still want to verify the amount of steel offloaded on site, you can calculate by counting total lengths and multiply below mentioned kg/ft. figures with total running feet of steel of respective bar designation.

how to calculate weight of steel

Quality check on site

Most of the quality checks on steel such as yield strength test, tensile strength test etc. are carried out in labs with proper instruments. However on site you can carry out following basic checks for satisfactions:

Weight test

Weight of the bar per length or per running foot should be the same as mentioned in above table.

Bending

It should not be hard and un-bendable. It should be easily bent to 90° and straighten back without breaking or any signs of cracks.

reinforcement steel bars for beams columns slabs

How much steel is used in construction of 5 marla house, 10 marla house, 1 kanal house and other structures, what are structural drawings and what is the importance of structural engineer during house construction? These topics will be discussed in coming blogs, stay tuned.

About The Author

Mohsin Munir
Holding a degree in BS EE (Electrical engineering) and astounding knowledge of house construction business since 2010, wide experience and relevant expertise in the construction business. Believe in research based strategy while holding a distinguished position in the construction market. Started at a small scale in 2010 and recognised among the top builders and contractors in Pakistan now, especially among the expatriates and overseas Pakistanis who always trusted in our commitment and services.

4 Comments

  • Khurram on April 5, 2018

    mohsin bahi thanks for prompt reply. im residing in korang town close to ur PWD office islamabad. Can i meet u in person at ur PWD office. can u further guide that ZAk steel in rawat is reputed or not. how can a lay man like me who does not know much about home construction will perform lab test for their tensile strength test etc and how much it cost. secondly does bahria enclave management on its own perform laboratory test for sariya quality or not. ittehad official say on phone that ZAK is making steel on manual machines and their grade is 22 not 40 is it true can u please confirm from ur sources or he said for defaming ZAK. i wont quote u at all just give humble brotherly advice. actually im afraid that builder can cheat me in these things. i will also share terms and condition of my home construction agreement once it get finalized. u r the most talented experienced honest humple person i have searched on internet so far. so much informative stuff available on ur website. God bless u. can u send me turn key sample home construction agreement for my perusal / information/ self consumption please. I will share with u once draft agreement finalized and take ur very useful advice.

    Thanks so very much mohsin bahi please share ur whats app no

    • Mohsin Munir on April 5, 2018

      Thanks a lot for your kind words of appreciation. Actually I usually visit Islamabad office twice a month, my next visit will be in mid of this month inshAllah.
      Talking about ZAK, in my last reply what I meant was that you can discuss technical reports with dealers of both brands and compare those figures. If you want to get the test done personally there are many material testing labs that provide steel bar testing and its not that costly. You can search close to you on google. And Bahria enclave management or any other housing society does not offer or provide material testing services to clients who are building their houses, they might have the testing facility but for the testing of construction material of their own projects.
      What ittehad guy is claiming about ZAK, I seriously doubt it, there can be a difference in grade but 22 seems like too much exaggerated figure on lower side. And if you are going for a turnkey contract with builder, then he should clearly mention brand name, its grade and maximum rate in his scope. For reference you can check our blog regarding Turnkey contract builder selection and agreement. We also have provided sample agreement in that blog.

  • Khurram on April 4, 2018

    aoa mohsin bahi what is a reputation of ZAK steel shaeen pipes rawat for 40 grade steel. actually im planing to build 10 marla in bahria enclave. why there is huge difference in prices i.e 86000/ton for Zak and 94000/ton in ittehad steel ZAK says that there is not much difference in quality only brand name matters. please share ur valuable expert opinion

    • Mohsin Munir on April 4, 2018

      Brand name does matter, but not that much in the rate. You should compare both in terms of their quality in lab reports. Two tests that matter in steel are tensile strength and yield strength measured in PSI or MPa. Most of the companies have mentioned and uploaded their results online on their websites. You can ask both about their lab reports for tensile and yield strength and brand with better results will have definitely more rate.

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