Kinds of bars
Plain bar
In order to produce this bar, first the iron ingots are entered into the furnaces at a temperature of 1100 ° C in the specified rows using a hydraulic jack. When the iron ingots are placed inside the furnace, they are prepared for rolling by eddy current at high temperature.
After the iron ingots reach to the desired temperature, they have been sent to the production line for rolling. Then the cast irons are placed on the rolls and directed to the roughing step. The roughing step reduces the diameter of the iron ingots in three steps and increases their length. After the roughing step, without passing the stand steps (the stand step is used for the rebar process and does not work for a simple bar), they go to the cutting area, which is for cutting the produced bars at specified lengths. Then the produced bars have been cut under the packaging guillotine according to the ISIRI standard and packed in the last step in the form of a bundle.
Standards of the plain bar
This type of bar is called A1 rebar according to the old standards and 240 simple rebar according to the new standards. A plain bar is produced from 6 to 200 mm diameter.
Rebar
This type of bar is named rebar because its surface has been knurled. The structural properties of this type of bars are better than ordinary plain bars. To increase the strength of concrete structures from 30 to 40%, rebar has been used. Due to the properties of stretching, bending & elasticity of the reinforced concrete, as well as the elasticity of the reinforced concrete (anti- earthquake concrete construction), this bar has been used in the metal structure of concrete structures.
The important computing features of the rebar are:
- Resistance
- Spacer of the rebar
- Tensile Strength
Standards of the rebar
These types of bars are classified to A2, A3, and A4 according to the old standards.
Rebar is manufactured from 5.5 to 40 mm diameter.
