#PentakosiaC ®
The idea of #PentakosiaC® mesh:
Until recently, there were areas where welded wire mesh made of cold-rolled steel in ductility class A could not be used. This problem concerned in particular engineering structures with alternating stresses. Mesh could also not be used in transportation construction.
CMC Poland was the first to introduce welded wire mesh made of hot rolled steel in malleability class C under the trademark #PentakosiaC®.
The #PentakosiaC® mesh speeds up work at the construction site so that there are no unnecessary changes of steel in the design and the whole project can be completed with one grade of steel. Welded steel #PentakosiaC® mesh can be used in reinforced concrete structures operating under dynamic and repeatedly changing loads, in a temperature range from -60ºC to +100ºC. These parameters have a significant impact on structure performance and safety.
#PentakosiaC® can be used in the construction of facilities such as:
- road and rail engineering structures
- public roads
- internal roads
- skyscrapers
- underground stations
- tunnels
- airports
B500SP steel is produced by hot rolling and stretch hardening. The mesh is a system of longitudinal and perpendicular bars of the same grade joined at all intersections by resistance welding.
| Standard meshes B500SP | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Marking | Of wire [mm] | Length [mrun] | Width [mrun] | Mesh [mm] | Sheet weight [kg] | Weight [kg/m2] | ||||||
| Q252 | 8 | 6,00 | 2,30 | 200x200 | 55,70 | 4,04 | ||||||
| Q335 | 8 | 5,00 | 2,15 | 150x150 | 57,70 | 5,37 | ||||||
| Q335 | 8 | 6,00 | 2,30 | 150x150 | 74,30 | 5,38 | ||||||
| Q503 | 8 | 6,00 | 2,30 | 100x100 | 109,00 | 7,90 | ||||||
| Q393 | 10 | 6,00 | 2,30 | 200x200 | 87,00 | 6,30 | ||||||
| Q523 | 10 | 5,00 | 2,15 | 150x150 | 90,05 | 8,38 | ||||||
| Q523 | 10 | 6,00 | 2,30 | 150x150 | 116,00 | 8,41 | ||||||
| Q785 | 10 | 6,00 | 2,30 | 100x100 | 170,30 | 12,34 | ||||||
| Q566 | 12 | 6,00 | 2,30 | 200x200 | 125,20 | 9,07 | ||||||
| Q754 | 12 | 6,00 | 2,30 | 150x150 | 166,90 | 12,09 | ||||||
| Q1131 | 12 | 6,00 | 2,30 | 100x100 | 245,10 | 17,76 | ||||||
| Weight 1 m2 mesh, kg | according to table |
|---|---|
| Permissible weight deviations of mesh 1 m2, % | ± 4,5 |
| Yield point Re, MPa | ≥ 500 |
| Tensile strenght Rm, MPa | ≥ 575 |
| Rm : Re Ratio | 1,15÷1,35 |
| Percentage elongation at the greatest tensile force Agt, % | ≥ 8,0 |
| Percentage elongation after fracture A5 % | ≥ 16 |
| Welded joint characteristics: | |
| a) joint shearing force, kN | F ≥ 0.3xAs x Re |
| b) bendig of rods joint by the angle of a = 60° on D=6dg diameter pin | lack of fractures |
Permissible measurement deviations:
- Length and width of mesh: ± 25 mm or 0,5% - depending on the higher value
- Spacing of rods : ± 15 mm or 7,5% smaller of these values
- Weight of meshes: the permissible deviation of weight per length unit of bars cut from meshes is ± 4,5 % of the nominal weight of the bars
When designing reinforced concrete structures with mesh reinforcement, the characteristic and design strength values for steel must be taken into account:
- Meshes made of B500SP ribbed steel
- Ductility class: C according to PN-EN 1992-1-1:2008 (Eurocode 2)
- Wire diameters: 8,0 ÷ 12,0 mm - ITB-KOT-2018/0662
- Wire diameters: Ø 8,0; Ø 10,0; Ø 12,0 mm - IBDiM-KOT-2018/0237
Welded steel mesh should be used in accordance with applicable building standards and regulations as well as a technical design developed for a specific application including the KOT.
| Declared performance in accordance with ITB-KOT-2018/0662 | |
|---|---|
| Essential characteristics of the construction product for the intended use or uses | Declared performance in accordance with ITB-KOT-2018/0662 |
| Yield point Re, MPa | ≥ 500 |
| Tensile strenght Rm, MPa | ≥ 575 |
| Rm:Re ratio | 1,15 ÷ 1.35 |
| Percentage elongation at the greatest tensile force Agt, % | ≥ 8,0 |
| Percentage elongation after fracture A5, % | ≥ 16 |
| Flexural strength by angle a = 20° after bending by angle a = 90° and ageing, on a mandrel with diameter 5 - ds. | lack of fractures |
| Welded joint characteristics: | |
| a) joint shearing force, kN | F ≥ 0,3 · As · Re nom |
| b) bendig of rods joint by the angle of a = 60° on D=6dg diameter pin | no cracks or scratches in the joint |
| Fatigue strength at σmax = 300 Mpa and 110 Mpa amplitude. | ≥ 2 · 106 cycles |
| Certificates for the B500SP mesh: | |||
|---|---|---|---|
| Country | Certificates | Standard Approval | Scope |
| Poland | Zetom 005-UWB-052 | ITB-KOT-2018/0662 | Ribbed wire meshes B500SP Ø 8.0 – 12.0 |
| Poland | Zetom 005-UWB-064 | IBDiM-KOT-2018/0237 | Ribbed wire meshes B500SP Ø 8,0; Ø10,0; Ø 12,0 |
Individual and atypical mesh on special order:
CMC goes to great lengths to achieve superior customer satisfaction. The lines used in the production of welded mesh provide exceptionally efficient production flexibility.
For that reason, CMC Poland can deliver unique, individual orders for atypical mesh. A modern line for the production of welded mesh allows the production of individual mesh with high efficiency.
Unprecedented solutions on the market allow completion of short runs which, until now, have not been possible or very expensive. The future is possible today and our solutions are setting new directions. CMC Poland sets new trends and permanently changes the welded mesh market.
Boundary conditions for individual mesh products:
Examples of non-standard mesh – manufactured to special order:
