How to Identify Rebar Grades

Rebar is added to concrete to give strength and durability. Concrete projects such as footings, slabs and block walls require rebar. You must install the correct size and grade of rebar on your concrete job, depending on the circumstances and the local building code. You can determine the rebar's grade prior to installation by observing the markings on the rebar. These markings usually use a line system or a number system.

Things You'll Need

  • Rebar marking identification chart

Instructions

  1. Line System

    • 1

      Locate the markings stamped on the rebar. The marks are stamped between the lines running across the diameter of the rod. You will see three markings. The first and third markings are letters indicating the manufacturer and the type of steel, respectively. The second mark is a number indicating the rebar size.

    • 2

      Examine the markings. For example the markings "Z," "4," "S," identifies the piece as a number 4 rebar, made of steel by a manufacturer designated as "Z." If these are the only marks present, then this is a grade 40 bar.

    • 3

      Look at the rebar for a line running the length of the rebar between the outside ribs. This line is another type of grade mark. This mark, in addition to the markings above, identifies the rod as a grade 60 bar. This is the only mark differentiating a grade 40 bar from a grade 60 bar with the line system.

    Number system

    • 1

      Read the markings on the rebar. The three markings stamped onto the bar's surface indicate the manufacturer, size and type of metal, respectively. These letters and numbers are similar to the line system.

    • 2

      Check the rebar for additional marks. A grade 60 rebar is stamped with "60" or a "6" with a "0" underneath. These marks follow the markings listed above.

    • 3

      Consult a rebar identification chart for other types of marks. Foreign made rebar may be marked differently.

Tips & Warnings

  • Keep a copy of a rebar identification chart handy for quick reference of other marking styles.
Related Searches

References

  • Photo Credit Photos.com/Photos.com/Getty Images

You May Also Like

  • About the Yield Strength of Rebar

    Rebar grades can be 40, 60 or 75 inches per pound. In a 40 grade, the minimum yield strength in pounds per...

  • Rebar Size for Slabs

    Rebar and concrete work well together because they expand and contract in unison when temperatures change. ... Each rod carries markings to...

  • Specifications for a Grade 60 Rebar

    Grade 60 rebar is ... Discover the ... 60 or 4 for grade 60 rebar. The marking right above the bottom number...

  • Classification of Rebar

    As with rebar grade, ASTM International provides English -- or standard -- as well as metric classifications for rebar thickness.

  • How to Find Your Land Survey Pins

    Identification Safety Pins. People have worn pins for over 20,000 years. ... How to Mark Land Property; How to Find Out What...

  • Can You Weld Rebar Together?

    Based on its grade, some rebar used in construction can be welded, while some can not. Does this Spark an idea? Other...

  • How to Look Up a State Employer Identification Number

    State Employer Identification Numbers (EINs) are tax identification numbers assigned to businesses operating in states that collect personal income taxes. This number...

  • Ways to Mark Property Lines

    Property markings, such as stakes in the ground, ... using rebar topped with a PVC pipe, planting Iris tubers next to stakes...

  • How to Pour Grade Beams

    Grade beams are a kind of rebar column structure ... If your beam is inside a wood form, mark the grade with...

  • How to Place Reinforcing Bars

    Then, continue laying out marks (using spray paint) 12 inches apart until you reach the edge form for the area. ... Rebar,...

  • How to Identify Antique German & French Dolls

    Others, such as Eugene Gesland, improved cloth bodies by reinforcing them with metal frames, ... How to Identify the Marks on Your...

  • Rebar Splicing Specifications

    ... lists rebar splicing specifications that must be followed or the rebar structure will not pass inspection. ... Specifications for a Grade...

Related Ads

View Blog Post

DIY Himmeli-Style Christmas Star Tree Topper