rebar construction
Steel Wire Mesh
Steel mesh is a concrete steel, which is manufactured from S220 steel by cold drawing and ribbed, has high strength and is generally used in construction. Steel mesh bars, Bst IVb or Bst 50/55 (RK) according to international criteria, are obtained by cold drawing (cold rolling) of normal St I iron with low carbon and specially ribbed in the process. The production of steel mats is carried out by cutting the bars wound on drums during drawing to the desired lengths in automatic straightening and cutting machines and then weaving them in electronically applied spot welding machines. Steel mesh production is carried out in accordance with TS 4559, DIN 488, BS 4483, ASTM-A 497 criteria.
On steel mats and used in ready-made ether concrete steel bars (S 500) details are specified in TS 708. In addition, St IV b bars are used as ready-made stirrups in construction. Where it is used as building material steel mesh, It is especially used in slabs, curtains, retaining walls, foundations, field concretes, concrete roads, tunnels and galleries, channels and canals.
Advantages
1-) Material Saving : steel mesh safety stress is more or less twice as high as that of normal rebar, steel mesh kullanılması durumunda normal inşaat demirine (STI) nazaran %40 civarından ağırlık tasarrufu sağlamaktadır. STI demirinden, beton 160 için ve = 1400 kg / cm2 iken steel meshIn the case of the iron, this amount is and = 2400 kg / cm2 , so the iron cross-section is reduced by half,
2-) Saving time : Steel meshThe reduction of the material used, the fact that it is in the form of plates, its simple transport and simplicity of assembly greatly simplifies the time.
3-) Labour Saving: As in normal iron, there are no works such as straightening, cutting the rods wire by wire and breaking the battery, making hooks, placing them on the floor at certain intervals and tying them together. Steel meshın ise kısa zamanda döşenmesi %50 Tasarruf sağlamaktadır.
4-) Saving on transport: Steel meshSince they are manufactured in standard (500 x 2.15) type size, their transport is simple. The transport cost is reduced as it saves iron.
5-) Paradan Tasarruf : Malzemenin yarıya yakın azalması, zamanın kısalması, işçilikten tasarruf ; Netice olarak tüm bunlar %10 – 20 arasında parasal tasarruf sağlamaktadır.
6-) Quality Superiority : Steel meshThey are manufactured in automatic welding marinas with the desired degree of precision. Steel mesh The rods show a homogeneous distribution in the concrete, so that the tensile forces are taken in a uniform manner. The rods are ribbed and welded to each other, which increases the tolerance, prevents slipping of the rods in the concrete and eliminates cracks, corrosion and leakages that may occur in the structure.
Areas of Use
If desired, it can also be supplied as hot-dip galvanised and polyester painted.
- Reinforced concrete slabs, unbeamed slabs, curtains, ribbed slabs, normal B.A. slabs, foundations
- Single and radial foundations,
- Curtain and retaining walls,
- Concrete runway, motorway and field concretes
- In subway and tunnel construction (used in Istanbul Metro).
- In water structures; dams, canals and canals,
- Prefabricated building elements,
- It is possible to use in various constructions of industrial buildings, suspended ceilings, fences, etc.
- Ducts, canals, garden fences, railings, suspended ceilings
Types
Standard steel mesh in two types as R and Q are produced.
R TYPE MATS: It is used in slabs and support equipment operating in one direction. All types R type mats length bar spacing is 150 mm, width bar spacing is 250 mm.
Q TYPE MATS: It is used in slabs and reinforced concrete structural elements working in both directions.
Length and width bar spacing is 150 mm.
Standard mats are 5.0/2.15 m. Simple to transport. Length bars can be double, width bar is always single. Special production is also made, maximum length bar is 8 m, maximum width bar is 2.80 m. Each section cm2/m. Special wire mesh is manufactured.
Quality
S220GD+Z 1322 CHEMICAL COMPOUNDS
Galvanised Structural Steels Coated with Zinc Standard: EN 10346 : 2015
Chemical Composition (%) | |||||||
Standard Provision | ERDEMİR Quality No | C max. | Si max. | Mn max. | P max. | S max. | |
Standard | Quality | ||||||
EN 10346 | S220GD+Z | 1322 | 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
EN 10346 | S250GD+Z | 1325 | 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
EN 10346 | S280GD+Z | 1328 | 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
EN 10346 | S320GD+Z | 1332 | 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
EN 10346 | S350GD+Z | 1335 | 0.20 | 0.60 | 1.70 | 0.10 | 0.045 |
S220GD+Z 1322 MECHANICAL PROPERTIES
Mechanical Properties‘4) | |||||
Standard Provision | ERDEMİR Quality No | Rp0.2/ReH N/mm2 (kg/mm2) min. | Rm(1)(3) N/mm2 (kg/mm2) min. | A80(2) (%) min. | |
Standard | Quality | ||||
EN 10346 | S220GD+Z | 1322 | 220 (22.4) | 300 (30.6) | 20 |
EN 10346 | S250GD+Z | 1325 | 250 (25.5) | 330 (33.6) | 19 |
EN 10346 | S280GD+Z | 1328 | 280 (28.6) | 360 (36.7) | 18 |
EN 10346 | S320GD+Z | 1332 | 320 (32.6) | 390 (39.8) | 17 |
EN 10346 | S350GD+Z | 1335 | 350 (35.7) | 420 (42.8) | 16 |
Explanations
- Tensile test values are applied to ‘longitudinal’ test specimens.
- “The ”Min. % elongation" value is reduced by 4 units for the thickness range 0.35 mm < t < 0.50 mm and by 2 units for the thickness range 0.50 mm < t < 0.70 mm.
- The tensile strength range is expected to be 140 N/mm2 (14.3 kg/mm2).
- The mechanical properties specified in the table are guaranteed for 1 month starting from the date on which the material is declared manufactured and ready for dispatch.