Binding wire in civil construction.-their specification & requirement. / Calculating the quantity of binding wire in construction. ~ PARAM VISIONS

Now, let us go through some of the FAQs related to the binding wire, used in the construction field.

Binding wire.

1. Why the binding wire is used in civil construction?

Binding wire is used for tying the rebar so that it is held in its position firmly without any displacement. We provide the rebars and stirrups at a proper center to center distance from each other, as per the design calculation and specification. When we place the green concrete and vibrate them, the rebar should not be shifted from its given position. So the binding wires of the proper gauge are used to tie the rebar firmly with one another.

Rebar tied with binding wire.

2. What is the quantity of binding wire required per ton of reinforcement steel?

The thumb rule for calculating the weight of the binding wire is 1% of the total weight of the reinforcement bar.

Suppose if the quantity of rebar is 100kg., then the approximate quantity of binding wire required is 1kg. So we can say that for every one ton of rebar purchased, we have to take 10kg. of binding wire.

But, in reality, the weight of the binding wire needed for 1 ton of the rebar varies from 7kg. to 13kg depending upon the diameter of the rebar and some other factors which we will discuss in the next question.

Given below is the approximate weight of the binding wire required, per ton of the rebar of different diameters.

Rebar diameter Binding wire/ton of rebar

6mm dia. 13kg.

8mm. dia. 12kg.

10mm. dia. 11kg.

12mm dia. 10kg.

............32mm. dia 7kg.

From the above table, we can see that the lesser the diameter of the rebar, the more the quantity of binding wire required and vice versa.

So taking the average of binding wire i.e. (13kg+7kg.)/2 comes to 10kg./ton (by thumb rule) of the rebar we use.

3. What are the different factors that affect the quantity of binding wire required?

The different factors which affect the quantity of binding wire in the construction are,

1. Diameter of the reinforcement bar.

2. Spacing of the rebar from each other.

3. Type of structural member.

4. Gauge and type of binding wire used.

5. Selection of tying ways or methods of binding wire.

6. Tying manually by hook or tying mechanically by using rebar tying tools.

7. Type of the structure (like building, dam, bridge, etc).

4. What is the gauge of the binding wire used in civil construction?

The gauge of the binding wire varies from 16 gauge to 22 gauge, depending upon the grade, type of the binding wire material, and surface treatment. But the widely used one is 18gauge annealed binding wire.

In India, the binding wire provided by Tata Tiscon comes in the range of 0.61mm. to 1.22mm.

Note: The gauge of the binding wire for the rebar tying tool is usually 21-22 gauge or 0.813mm.

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5. What is the specification for the binding wire in India?

You can refer to IS 280(2006) for the specification like tolerance, tensile properties, chemical and physical requirements, etc.

6. How to measure the gauge of the binding wire on the construction site?

The specification of the binding wire will be mentioned over the bundle of the branded product, however, on-site you can use a screw gauge to find out the binding wire gauge.