How to calculate binding wire quantity for steel bars

The Binding Wire plays an important role in the construction sector to tie reinforcing steel bars at the joints in order to retain the joints in exact location as well as maintain the structure integrity specifically throughout the preliminary framework prior to pouring concrete.

It is also known as annealed wire and created with mild steel. The mild steel raw material offers strong tensile strength together with sufficient flexibility to bend the wires constantly devoid of breaking.

Binding wire is found in various diameters ranging from 0.61 mm to 1.22 mm.

Given below, the advantages of binding wires in construction :

1. Annealing facilitates the wires to remain soft for ease of application.
2. The tensile strength of the wires aid in tying the knots devoid any breakage.
3. The wires are flexible enough to suit the multiple applications required repetitively.
4. They facilitate the concrete to pour into the frames with no displacement of the rebars.
5. To ensure secondary frame designs like chairs, spacer bars in construction
6. To retain lapped bars in exact location.

There exist several methods for tying the joints. In order to determine exact quantity of steel for various structural components, it is also vital to get the required amount of binding wires.

How to work out the quantity of binding wires :-

The calculation is based on some thumb rules which are usually followed by construction industry.

Also Read: How to calculate the amount of binding wire in rebar

The quantity of binding wires is dependent on the type of structure where it should be applied as well as type of bar (diameter of bar length of bar).

According to thumb rules,

Necessity of binding wires for 1 quintal (100 kg) of steel reinforcement = 0.9 to 1.3 kg

Necessity of binding wires for 1 ton (1000 kg) of steel reinforcement = 9 to 13 kg

Therefore, the binding wire required for tying 1000 kg of 8 mm bars is approx 12 kg and for 28 mm or 32 mm bars it will be roughly 7 kg. If the diameter of the bar is larger, the quantity of the binding wire will be reduced.

Video Source: Civil Technology