Customized meshes

Customized electro-welded meshes are products for reinforced concrete that are especially manufactured for a project or prefabricated work. They are designed by the engineering department according to static requirements and necessary sizes.
The mesh as-values, length and width can be freely chosen from various options.
This type of meshes breaks down as follows:

  • Unidirectional electro-welded meshes: longitudinal bars play a role in terms of statics, whereas transversal bars are only used as fitting bars.
  • Bidirectional electro-welded meshes: both longitudinal and transversal bars play a role in terms of statics.
  • Electro-welded meshes for reinforced concrete: in some areas, there is an increased number of longitudinal bars.

Applications of customised electro-welded meshes:

Customised electro-welded meshes are available upon request (terms of delivery: about 10/14 days). They are directly delivered by the manufacturing plant to the site of the project or prefabricated work. Our teams can help you to design customised electro-welded meshes or reinforcements.

Main advantages of customised electro-welded meshes:

  • Fit the building element perfectly; length and width are customised
  • The mesh is long up to 14.0 m and wide 1.0 m to 3.35 m (weld width 3.30 m)
  • No additional costs for on-site cuts
  • No wastes
  • Fit the required steel cross-section perfectly thanks to the possibility of using of bars with different diameters (4.0 to 16.0 mm, double bars up to 12.0 mm)
  • No useless materials for overlaps
  • No static height losses (one-level overlaps); overlaps are eliminated as much as possible
  • Reduced laying time thanks to the use of one single mesh for longitudinal and transversal reinforcement.
mattenanfang

Meshes can be turned upside down to change the direction of bars (transversal bars below and longitudinal bars above). BE CAREFUL when deciding the positions for overlaps!!

L

Mesh length up to 12.0 m

B

Mesh width up to 3.10 m

b S

Weld width up to 3.00 m

a L

Distance between longitudinal bars starting from 50 mm openings or without openings

a Q

Distance between transversal bars ≥ 25mm,

d s1

Longitudinal bar Ø in the inner area, many options to choose from according to weldability

d s2

Longitudinal bar Ø in the peripheral area ds1 ±2mm and weldability

n li/re

Number of peripheral longitudinal bars on the left/right edge

d s3

Transversal bar Ø, many options to choose from according to weldability

ü 1

Leading tail ≤ Ø x 100 mm

ü 2

Trailing tail ≤ Ø x 100 mm

ü 3

Left tail ≥ 10 to 800 mm (starting from diam. 8,0 mm)

ü 4

Right tail ≥ 10 to 800 mm (starting from diam. 8,0 mm)

A k

Distance between short bars from the beginning of the mesh

L K

Short bar length
Length “1”, many options to choose from,
if Lk ≥ s1 + 1,700 mm and Ak=0
Inverted order “2” only when short bars have the same length, Lk + Ak = L

Various reinforcement options are available for reinforced concrete self-supporting structures.

  • Rods for reinforced concrete
  • Standard electro-welded meshes
  • Customised electro-welded meshes

Only rods for reinforced concrete offer the opportunity to use one single type of product for reinforcement purposes. Most of the times, all the other products require a mix of reinforcements.
Rods for reinforced concrete
This product, which can be laid as single bars with fixed diameter and variable distances, ensures more flexibility when reinforcing a reinforced concrete building element. However, this advantage entails a cost associated with the time required to build the reinforcement; many rods must be levelled and tied. Furthermore, the reinforcement is instable during building, especially the upper portion. Finally, the reinforcement quality is much dependent upon the layer’s skills.
Standard electro-welded meshes
This standardised reinforcing product for AQ meshes is currently available in 10 types of cross-section with one length and one width.
This means that the reinforcement is partially oversized or rods must be added in some areas. According to the building element size, these electro-welded meshes must be partially adapted by the customer. Furthermore, unusable wastes can remain.
A disadvantage to be taken into account consists in the superposition of several layers at overlaps. In the worst cases, standard electro-welded meshes have 3 layers = 6 superposed bars; for an AQ82 mesh, this means (6 x 8.2) 49.2 mm.

  • How to comply with the “static height” and the “cover to reinforcement”, for instance in case of floorings with prefabricated elements in the lower portion and lattice beams!?
  • How to ensure the position of the upper reinforcement when the height of the lower portion varies, thus forming waves due to superposed layers and additional rods to be tied at cross points? . .

Customised electro-welded meshes
These reinforcements, which are especially manufactured for a project, require more time and a more intensive design activity to be performed by the engineering department. However, they ensure an effective and safe solution in terms of statics.ù
According to customers’ requirements, unidirectional or bidirectional electro-welded meshes can be laid.

  • Unidirectional electro-welded meshes have self-supporting longitudinal bars that are tied, at a large distance, by means of fitting bars. The tail length can be chosen at the beginning or at the end of each mesh. Two mesh layers are superposed and tied at cross points. Fitting bars are at the same level as the first layer and do not bear the framework.
  • Bidirectional electro-welded meshes have longitudinal and transversal self-supporting bars. The tail length can be chosen at the beginning and on the long edge of the mesh.Overlaps do not exceed one level and do not bear the framework.
    The cross-section can be adapted to static requirements. In case of need, rods can be added to pointed ends, for instance they can be laid on the first layer of unidirectional meshes, and are not bearing because they are located at the same position as the bearing bars of the mesh.
  • In this way, less mesh panels are to be laid, there are no wastes and the reinforcement position is the one calculated by the engineering department.

Comparison between reinforcements1
Comparison between reinforcements2
Comparison between reinforcements3