What Does Mesh Opening Mean in Rockfall Netting Rolls?

In rockfall netting roll specifications, mesh opening means the size of the openings formed by the double twisted hexagonal mesh. It describes the mesh aperture, not the wire diameter, roll width or protection grade.

This term appears often in product names and quotations. A buyer may see specifications such as 60x80mm, 80x100mm or 100x120mm. These numbers describe the hexagonal mesh opening used in the roll.

Mesh Opening Is the Hexagonal Opening Size

Rockfall netting rolls are commonly made with double twisted hexagonal mesh. The mesh opening is the size of that repeated hexagonal opening.

For example, 80x100mm mesh opening means the roll uses an 80x100mm hexagonal mesh specification. It does not mean the roll is 80mm or 100mm wide, and it does not describe the thickness of the wire.

When this detail is written clearly, it is usually shown together with the mesh wire diameter:

2.7mm wire, 80x100mm mesh opening

or:

3.0mm wire, 80x100mm mesh opening

Mesh Opening Is Not Wire Diameter

Mesh opening and wire diameter are different specification items.

Wire diameter describes the thickness of the steel wire used to form the netting body. Mesh opening describes the size of the holes in the hexagonal mesh. A product name that mentions only one of these numbers is incomplete.

For example, two rockfall netting rolls may both have 80x100mm mesh opening. If one roll uses 2.7mm mesh wire and the other uses 3.0mm mesh wire, they should not be treated as the same supply specification.

The same logic works in the other direction. Two rolls may both use 3.0mm wire, but if their mesh openings are different, the finished rolls are still different products.

Common Mesh Opening Expressions

Mesh opening is usually written as two numbers with millimeters. In rockfall netting discussions, common expressions may include:

The exact size should follow the project document, order requirement or confirmed product specification. Mesh opening alone should not be used as the full product description.

Why Mesh Opening Should Be Read with Wire Diameter

Mesh opening affects how the netting roll is described, but it should be read with the wire diameter. These two details together give a clearer view of the mesh body.

For example:

This is why comparing rockfall netting only by mesh opening can be misleading. The opening size, wire diameter, coating and roll size all belong to the finished roll specification.

Mesh Opening Is Only One Part of the Roll Specification

Mesh opening helps define the netting structure, but it is not the full roll specification.

A complete rockfall netting roll description normally needs other details, such as mesh wire diameter, surface treatment, selvedge wire if specified, roll width and roll length. For general product data, see the rockfall netting specification table.

Read as a term, mesh opening means the size of the hexagonal openings in the rockfall netting roll. To understand the actual product being supplied, it should be read together with wire diameter, coating and roll size.