LLC «Plant of platform gratings» is engaged in the manufacture and supply of reinforcement mesh for construction.
Products are manufactured in accordance with TU U 25.1-41336154-002: 2020 according to the standard or individual customer's drawing.
The equipment allows welding of reinforcing bars with a diameter of 5 to 16 mm, manufactured in accordance with the requirements of DSTU 3760, GOST 6227, GOST 3282, GOST 5781, GOST 10884, DIN 488-1, BDS 4449, SR EN 43.
Reinforcement mesh is made of bars of the following grades:
- Вр-1 – cold deformed;
- А ІІІ 20 Г 2 С – hot-boiled;
- А ІІІ 25 Г 2 С – hot-boiled;
- А 240 – hot-boiled;
- А 400 С – hot-boiled;
- А 500 С – hot-boiled;
- В 500 С – cold-deformed.
Reinforcement mesh combines main and distribution reinforcing and consists of steel bars with a diameter of 5 to 16 mm inclusive, placed in two mutually perpendicular directions and connected at the joints by electric resistance welding.
Welded meshes are made with the spacing between individual longitudinal bars 100-150 mm and transverse bars with unregulated spacing 1 mm from 50 mm to 400 mm. Width of mesh pattern based on axes of extreme bars is from 1200 to 2750 mm; length of mesh pattern is from 2000 to 6000 mm.
Rods of different diameters are used for manufacturing reinforcement mesh. Light weight gratings are produced if the diameter of the bar does not exceed 10 mm. Heavy gratings are produced if the diameter of the bar is 12-16 mm.
Reinforcement mesh patterns can be square and rectangular, while according to technical requirements (TU) bars with the same diameter are always placed in one direction. The use of ready-to-install reinforcement mesh is an alternative to mesh grid and wire mesh. Such reinforcement mesh greatly facilitates, speeds up and reduces the cost of construction process.
L – grid length, W – grid width, aLW – longitudinal interval, aCW – transverse interval, dLW – diameter of the longitudinal rod, dCW – diameter of the cross bar, eLW1 – protrusion of the longitudinal rod in front, eLW2 – protrusion of the longitudinal rod behind, eCW1 – protrusion of the cross bar on the right, eCW2 – left bar protrusion
Table 1 – - Mesh size
| # | Size name | Value, mm |
|---|---|---|
| 1 | L – grid length | 2000 – 6000 |
| 2 | W – grid width | 1200 – 2750 |
| 3 | aLW – longitudinal interval | |
| 100 mm longitudinal bar pitch | 100/200/300/400/500/600/700/800/900/1000 | |
| 150 mm longitudinal bar pitch | 150/300/450/600/750/900/1050/1200 | |
| 4 | aCW – transverse interval * | 50 * – 400 * |
| 5 | dLW – diameter of the longitudinal rod | 5 – 16 |
| 6 | dCW – diameter of the cross bar | 5 – 16 |
| 7 | eLW1 – protrusion of the longitudinal rod in front | 10 – 80 × dLW – diameter of the longitudinal rod |
| 8 | eLW2 – protrusion of the longitudinal rod behind | 10 – 80 × dLW – diameter of the longitudinal rod |
| 9 | eCW1 – protrusion of the transverse rod on the right | 5 – 80 × dCW – diameter of the cross bar |
| 10 | eCW2 – protrusion of the cross bar on the left | 5 – 80 × dCW – diameter of the cross bar |
| Note . * Multiplicity of a step of a cross bar without step adjustment of 1 mm from 50 mm to 400 mm. | ||
Possible sizes of longitudinal bars – 10 – 80 × dLW – diameter of the longitudinal rod.
Possible sizes of issues of cross bars – 5 – 80 × dLW – diameter of the longitudinal rod.
Depending on the needs or tasks of the customer, reinforcing mesh can be produced without external releases.
The main benefits of using a reinforcing mesh include the following:
- made on high-tech and high-precision modern equipment by contact spot welding;
- high strength in places of welding and withstanding significant tensile and tensile loads, significant resistance to failure;
- make it possible to significantly accelerate productivity and performance in construction or other applications;
- reduce labor costs and reduce the estimated cost of work in 2 & ndash; 3 times in construction or other applications;
- no waste on construction due to the possibility of using reinforcing mesh of non-standard sizes;
- wide range, Possibility of production of a grid of the non-standard sizes by the individual order; high quality standards;
- minimum production time.
Cross-shaped joints of bars at intersections are carried out using a high-tech and high-precision up-to-date equipment by means of electric resistance welding.
On meshes with main bars made of class A-1 plain steel all sections of the rods should be welded. On meshes with main bars with periodic profile welding of sections of bars through one or two sections in a checkerboard pattern is allowed, if this was indicated in the drawings for the mesh. In the mesh not more than two non-welded sections of bars with an area of 1 m2 of mesh from the total number of welded sections is allowed. Bars in welding points should have breaking force or ultimate tensile strength not lower than the one indicated in DSTU B V.2.6-168. The strength of welded joints of the rods should meet the requirements of DSTU B V.2.6-168.
If the requirements for strength uniformity are not imposed on welded joints of bars located in two or one direction, the insufficient load during the test should be at least 50% of the breaking strength of the bars or the ultimate tensile strength of reinforcing steel of a smaller diameter. The cross-shaped connection of the bars of the mesh should not be destroyed by shock effects when the mesh is free falling from a height of 1 m. Butt welded joints of the bars shall be made by resistance spot welding using up-to-date equipment. The strength of butt welded joints of bars should meet the requirements of DSTU B V.2.6-168. Main reinforcement on a bar length of 6 m should not have more than two butt joints. Butt joints of bars laying in one direction within the reinforcement pitch in the other direction are allowed in at least three bars.