HOW TO SELECT RIGHT STEEL TMT BARS FOR YOUR HOME?A steel TMT buying guide
Buildzar.com
PLANNING TO BUY TMT STEEL BARS?GO THROUGH OUR STEEL BUYING GUIDE AND MAKE AN INFORMED DECISION
▪ Overview
▪ Usage
▪ Types, Grades & Sizes
▪ DIY Quality & Quantity Checks
▪ Properties
▪ Do’s and Don’ts for Storage
Buildzar.com
OVERVIEWTMT Steel bars are also known as TMT bars, 'TMT Saria' Steel Rods or Rebars (Reinforcement Bars).
They are the most important component of RCC (Reinforced Cement Concrete) structure.
The word TMT stands for Thermo Mechanically Treated Steel. The two major variants are Primary Steel and Secondary steel which are available in various grades and sizes.
Buildzar.com
WHY TO USE TMT BARS▪ TMT Steel rebars increase the tensile strength of concrete.
▪ They have lesser impurities and hence have more uniform strength.
▪ Steel & concrete have similar temperature coefficients, making them expand / contract together and help in bonding.
▪ Lower grades of rebars are twisted at cold temperature to increase their strength. Whereas, there is no twisting during TMT so torsional stress cannot form surface defects in TMT bars. Hence, TMT bars resist corrosion better than cold, twisted and deformed (CTD) bars.
Buildzar.com
TYPE OF MATERIAL▪ The first step in choosing TMT bars is to select the type of steel
material. The two materials available in market are Primary Steel and Secondary Steel.
▪ Primary steel is the virgin steel extracted from iron ore whereas secondary steel is the recycled steel sourced from steel scrap.
▪ Choose the material according to construction requirement and your budget.
Buildzar.com
GRADES OF TMT STEEL BAR▪ Once you are done with material selection, choose the grade of TMT bar. The
grade represents the amount of stress a bar can take and is measured in N/mm2.
▪ Higher the grade better is its stress taking capacity.
▪ The four grades of TMT Steel bars are :
▪ The most common type of grade used in construction is Fe 500, which means that it can take stress upto 500N/mm2.
▪ The higher grades of bars such as Fe 600 are not generally available and are made on order.
Grade Fe 415 Fe 500 Fe 550 Fe 600
Stress Capacity 415 N/mm2 500 N/mm2 550 N/mm2 600 N/mm2
Buildzar.com
VARIANTS OF TMT STEEL BAR▪ The two variants of TMT Bars are: Ductile (D) and Super Ductile (SD).
▪ So a TMT bar of grade Fe 500 will have two other variants as Fe 500 D and Fe 500 SD.
▪ These variants are used only in heavy constructions or earthquake prone areas.
TMT GRADE VARIANT - D VARIANT - SD
Fe 415 Fe 415 D
Fe 500 Fe 500 D Fe 500 SD
Fe 550 Fe 550 D
Fe 600
Buildzar.com
SIZES OF TMT STEEL BARS▪ 8mm, 10mm, 12mm and 16mm are the most commonly
used sizes in RCC. The bigger diameters are used in high-rise buildings only.
▪ The standard length of TMT bars is 12 meters, but you can select the length as per requirement.
Buildzar.com
CHECK THE QUALITY & QUANTITY YOURSELFCheck for identification mark on the bars from the manufacturing firm.
Check for Standardization & Grading marks. Steel bars follow IS:1786 standards
The bars must not be too rusty. Although, a small amount of rust is acceptable.
Count the number of bundles and bars in each bundle.
Check the diameter of the rebars.
Ask for the weighbridge receipt from the delivery man to check for correct weight.
Buildzar.com
PROPERTIESBetter ductility and malleability High yield strength and toughness
More bonding strength Earthquake resistant
Corrosion resistant High thermal resistance
Economical & safe in useDecreased level of Sulphur & Phosphorus, ensuring less impurities
Buildzar.com
DO’S AND DON'TS FOR STEEL BARS STORAGE
The stacking height must be optimized for different diameters of bars.
Steel bars should be stored in a way to avoid distortion and to prevent deterioration and corrosion.
No contact with Water & Moisture or else lumps will be formed and strength will be lost.
More stacking height reduces the tensile strength & bond strength of bars present in lower layers.
Steel bars should not be cleaned by oily substance to remove the rust.
Buildzar.com
CALCULATE CONSTRUCTION COSTAccurately forecasting the building cost is one of the biggest challenges faced in home building journey.
Calculate your construction cost in simple steps by using
BEZTIMATE
GET BEST QUALITY STEEL TMT BARS AT BEST PRICES!
Visit us at www.buildzar.com
Call us at +91-9555-913-913