High strength type i steel grating

Abstract

The utility model relates to building material technical field discloses a high -strength I -type steel grating, including outer frame and flat steel, the outer wall of flat steel is connected with hot dip galvanizing layer fixedly, the outer wall of hot dip galvanizing layer is connected with electroplated zinc layer fixedly, the outer wall left and right sides of electroplated zinc layer all are connected with a plurality of horizontal reinforcing rib fixedly, the outer wall of a plurality of horizontal reinforcing rib all are connected with a plurality of longitudinal reinforcing rib fixedly, the outer wall of flat steel is set up with a plurality of weight -reducing holes, the outside of a plurality of weight -reducing holes all are connected with hole rib fixedly, the inner wall of a plurality of flat steels all are connected with a plurality of twisted square steel fixedly. In the utility model, through the synergies of the hot dip galvanizing layer and electroplated zinc layer of flat steel outer wall, the anticorrosion performance is enhanced, the horizontal reinforcing rib enhances the flat steel horizontal bending -resistance, and the longitudinal reinforcing rib forms the grid and promotes the overall strength, and the weight -reducing hole reduces the weight, and the hole rib makes up the punching intensity loss, reduces the cost while being convenient for carrying installation.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, and in particular to a high-strength I-shaped steel grating. Background Technology

[0002] Steel grating, as an important building material, plays a crucial role in modern industrial and infrastructure construction. It is made of flat steel and twisted square steel connected by welding or pressure welding to form a regular grid structure. Thanks to its unique structure, steel grating has excellent load-bearing capacity, capable of withstanding the heavy pressure of various objects. It is used in industrial buildings for work platforms and stair treads, bridge walkways and maintenance access, and ship deck areas. Its grid design not only ensures certain ventilation and drainage performance but also facilitates the passage of personnel and equipment. In industrial production scenarios, workers operate equipment on platforms built with steel grating, which must stably support the weight of personnel and equipment. On bridges, steel grating must withstand frequent traffic from pedestrians and vehicles. However, with the expansion of application scenarios and the increasing performance requirements of various industries, traditional steel grating has revealed many problems.

[0003] A search revealed Chinese Patent Publication No. CN213926641U, which discloses a steel grating and its usage method. The grating includes a fixed frame and a steel grating body mounted on the fixed frame. The fixed frame is equipped with two pressing mechanisms and two clamping mechanisms. Each pressing mechanism includes a first straight rod, a second straight rod, a drive rod, a pressure rod, a support rod, a spring, and a stop block. Each clamping mechanism includes an L-shaped rod, a bolt, a drive block, and a second spring. Using the steel grating, under the weight of the grating body and the rotation of the bolt, the pressure rod and the L-shaped rod press and squeeze the steel grating body respectively, fixing it in place and preventing displacement or loss during use, thus providing safety for residents. However, in practical use, this type of steel grating is heavy, inconvenient to install, and has a high manufacturing cost. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-strength I-type steel grating, which aims to improve the problems of existing steel gratings being heavy, inconvenient to install, and expensive to manufacture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength I-shaped steel grating, comprising an outer frame and flat steel, wherein a hot-dip galvanized layer is fixedly connected to the outer wall of the flat steel, an electro-galvanized layer is fixedly connected to the outer wall of the hot-dip galvanized layer, multiple transverse reinforcing ribs are fixedly connected to the left and right sides of the outer wall of the electro-galvanized layer, multiple longitudinal reinforcing ribs are fixedly connected to the outer walls of the multiple transverse reinforcing ribs, multiple weight-reducing holes are provided on the outer wall of the flat steel, and hole ribs are fixedly connected to the outer sides of the multiple weight-reducing holes, multiple twisted square steels are fixedly connected to the inner walls of the multiple flat steels, and multiple positioning mechanisms are provided on the inner wall of the outer frame.

[0006] The above technical solutions provide synergistic protection through hot-dip galvanizing and electro-galvanizing, enhancing corrosion resistance. Transverse and longitudinal reinforcing ribs form a stable grid, improving the load-bearing capacity of the steel grating. Weight-reducing holes combined with ribs reduce weight while ensuring strength, and twisted square steel reinforces the connection between flat steel.

[0007] As a further description of the above technical solution:

[0008] The positioning mechanism includes a base plate, the outer wall of which is fixedly connected to the inner wall of the outer frame, a locking strip fixedly connected to the top of the base plate, side strips fixedly connected to the front and rear sides of the inner wall of the outer frame, a locking groove opened at the bottom of the flat steel, and side grooves opened on the front and rear sides of the flat steel.

[0009] Through the above technical solution, when installing flat steel, the side strips and side grooves, and the clamping strips and clamping grooves are precisely matched to achieve the constraint and positioning of the flat steel in the horizontal and vertical directions, ensuring the assembly accuracy of the internal structure of the steel grating, thereby improving the overall structural stability of the steel grating and reducing potential safety hazards caused by installation deviations.

[0010] As a further description of the above technical solution:

[0011] Multiple anti-slip textures are fixedly connected to the top of each of the electroplated zinc layers, and the top of the outer frame is provided with an edge seal.

[0012] The above technical solutions include: anti-slip texture increases the surface friction of the steel grating, effectively preventing pedestrians or objects from slipping or sliding on the surface of the steel grating, improving safety in humid or oily environments, and sealing the top of the outer frame to prevent debris from entering the internal structure of the steel grating, while also enhancing the overall structural strength of the top of the outer frame.

[0013] As a further description of the above technical solution:

[0014] The top four sides of the edge banding are all threaded with screws, and the top four sides of the outer frame are all provided with screw holes.

[0015] The above technical solution involves screws and screw holes working together to firmly fix the edge banding to the top of the outer frame, ensuring that the edge banding will not loosen during use and will continue to stably perform its protective and strength-enhancing functions, thus ensuring the stability of the connection between the edge banding and the top of the outer frame.

[0016] As a further description of the above technical solution:

[0017] Two lifting holes are provided on the front and rear sides of the outer wall of the outer frame, and the diameter of the multiple twisted square steel bars is set to 7-9mm.

[0018] Through the above technical solution: the lifting holes facilitate the lifting operation by inserting tools such as hooks when handling or installing steel grating, greatly improving the convenience of handling and installing steel grating. The diameter of each of the twisted square steel bars is set to 7-9mm. Setting the diameter to 8mm can make the twisted square steel bars tightly fixed to the inner wall of the flat steel, strengthen the connection strength between the flat steel bars, and promote the formation of a tighter whole of the entire steel grating.

[0019] As a further description of the above technical solution:

[0020] The thickness of each of the flat steel bars is set to 4-6mm, and the width of each of the flat steel bars is set to 28-32mm.

[0021] Through the above technical solution, the thickness of each of the flat steel bars is set to 4-6mm, and the width of each of the flat steel bars is set to 28-32mm. The thickness and width are set to 5mm and 30mm respectively. While ensuring that the steel grating has good overall load-bearing capacity, the material cost and weight are cleverly taken into account, and the balance between performance and cost is optimized, making the steel grating more cost-effective in practical applications.

[0022] As a further description of the above technical solution:

[0023] The thickness of each of the plurality of transverse reinforcing ribs is set to 2-4 mm, and the width of each of the plurality of transverse reinforcing ribs is set to 18-22 mm.

[0024] Through the above technical solution: the thickness of the multiple transverse reinforcing ribs is set to 2-4mm, and the width of the multiple transverse reinforcing ribs is set to 18-22mm. The thickness and width are set to 3mm and 20mm respectively. The transverse reinforcing ribs can effectively enhance the transverse bending resistance of the flat steel and better cooperate with the longitudinal reinforcing ribs to further improve the overall strength of the steel grating, making the steel grating less prone to deformation or breakage when subjected to high loads.

[0025] As a further description of the above technical solution:

[0026] The thickness of each of the multiple hot-dip galvanized layers is set to 75-85 μm, and the thickness of each of the multiple electro-galvanized layers is set to 15-25 μm.

[0027] Through the above technical solution: the thickness of each of the multiple hot-dip galvanized layers is set to 75-85μm, the thickness of each of the multiple electro-galvanized layers is set to 15-25μm, and the thicknesses of the hot-dip galvanized layer and the electro-galvanized layer are set to 80mm and 20mm respectively. The two work together to further enhance the corrosion resistance of the steel grating, while improving its appearance quality and aesthetics, so that the steel grating can maintain good performance and appearance even in harsh environments.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the corrosion resistance is enhanced by the synergistic effect of the hot-dip galvanized layer and the electro-galvanized layer on the outer wall of the flat steel. The transverse reinforcing ribs enhance the transverse bending resistance of the flat steel and form a grid with the longitudinal reinforcing ribs to improve the overall strength. At the same time, the weight-reducing holes reduce the weight, and the hole ribs make up for the strength loss of the drilling. This reduces costs and facilitates handling and installation.

[0030] 2. In this utility model, the engagement of the side groove and the side strip and the engagement of the groove and the strip achieve the effect of installing the flat steel, ensuring the assembly accuracy of the internal structure of the steel grating, thereby improving the overall structural stability of the steel grating, reducing potential safety hazards caused by installation deviations, and laying a solid foundation for the steel grating to reliably bear loads and perform its various functions in the future. Attached Figure Description

[0031] Figure 1 This is a perspective view of a high-strength I-shaped steel grating proposed in this utility model;

[0032] Figure 2 This is a partial structural breakdown diagram of a high-strength I-type steel grating proposed in this utility model;

[0033] Figure 3 This is a schematic diagram of the positioning mechanism for a high-strength I-shaped steel grating proposed in this utility model;

[0034] Figure 4 This is a cross-sectional view of the flat steel of a high-strength I-shaped steel grating proposed in this utility model.

[0035] Figure 5 This is a cross-sectional view of the outer frame of a high-strength I-shaped steel grating proposed in this utility model.

[0036] Legend:

[0037] 1. Outer frame; 2. Positioning mechanism; 201. Base plate; 202. Clip; 203. Side strip; 204. Slot; 205. Side groove; 3. Flat steel; 4. Hot-dip galvanized layer; 5. Electro-galvanized layer; 6. Transverse reinforcing rib; 7. Longitudinal reinforcing rib; 8. Weight reduction hole; 9. Hole rib; 10. Twisted square steel; 11. Anti-slip texture; 12. Edge sealing; 13. Screw; 14. Screw hole; 15. Lifting hole. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] See attached document Figure 2 Appendix Figure 3 and attached Figure 4This utility model provides an embodiment of a high-strength I-type steel grating, comprising an outer frame 1 and flat steel 3. The outer frame 1 serves to support and fix the internal structure, providing a stable framework for the entire steel grating. The flat steel 3 is the main load-bearing component, bearing externally applied loads. A hot-dip galvanized layer 4 is fixedly connected to the outer wall of the flat steel 3. The hot-dip galvanized layer 4 isolates air and moisture, effectively preventing the flat steel 3 from rusting and significantly extending the service life of the steel grating. An electro-galvanized layer 5 is fixedly connected to the outer wall of the hot-dip galvanized layer 4. The electro-galvanized layer 5 further fills the micropores of the hot-dip galvanized layer 4, enhancing the overall corrosion resistance. Multiple transverse reinforcing ribs 6 are fixedly connected to the left and right sides of the outer wall of the electro-galvanized layer 5. The multiple transverse reinforcing ribs 6 enhance the bending resistance of the flat steel 3 in the transverse direction, improving the transverse load-bearing capacity of the steel grating. Multiple longitudinal reinforcing ribs 7 are fixedly connected to the outer walls of the multiple transverse reinforcing ribs 6. The longitudinal reinforcing ribs 7 and the transverse reinforcing ribs 6 together form a grid-like reinforcing structure, providing comprehensive protection. To improve the load-bearing capacity of the steel grating in all directions and make it less prone to deformation or breakage under high loads, multiple weight-reducing holes 8 are opened on the outer wall of the flat steel 3. The weight-reducing holes 8 effectively reduce the overall weight of the steel grating without significantly affecting the strength of the flat steel 3, thereby reducing material costs and facilitating handling and installation. The outer sides of the multiple weight-reducing holes 8 are fixedly connected with hole ribs 9, which strengthen the surrounding structure of the weight-reducing holes 8 and compensate for the local strength loss caused by drilling. The inner walls of the multiple flat steel 3 are fixedly connected with multiple twisted square steels 10, which enhance the connection strength between the flat steel 3, making the steel grating a tight whole and improving the torsional and shear resistance of the steel grating. The tops of the multiple electro-galvanized layers 5 are fixedly connected with multiple anti-slip patterns 11, which significantly increase the friction of the steel grating surface and effectively prevent pedestrians or objects from slipping or sliding in wet or oily environments, thereby improving the safety and reliability of use. The inner wall of the outer frame 1 is provided with multiple positioning mechanisms 2.

[0040] Specifically, the outer frame 1 serves as the basic framework, supporting and securing the internal structure, and providing a stable installation platform for the flat steel 3 and other components. The flat steel 3 is the main load-bearing component, with its outer wall sequentially connected to a hot-dip galvanized layer 4 and an electro-galvanized layer 5. When facing external environmental corrosion, the hot-dip galvanized layer 4 first isolates air and moisture to prevent the flat steel 3 from rusting. The electro-galvanized layer 5 further fills the pores of the hot-dip galvanized layer 4, enhancing the overall corrosion resistance. When the steel grating is under pressure, the transverse reinforcing ribs 6 and the longitudinal reinforcing ribs 7 form a stable grid-like reinforcement structure, improving the overall load-bearing capacity of the steel grating. To prevent deformation or breakage under high loads, the weight-reducing holes 8 on the flat steel 3 reduce the overall weight of the steel grating without affecting strength, thereby reducing costs and facilitating handling and installation. The ribs 9 reinforce the structure around the weight-reducing holes 8, compensating for the strength loss caused by drilling. The twisted square steel 10 is fixed to the inner wall of the flat steel 3, enhancing the connection strength between the flat steel 3 and making the steel grating a tight whole. The anti-slip texture 11 on the top of the electro-galvanized layer 5 increases surface friction, effectively preventing pedestrians or objects from slipping in humid or oily environments, thus improving the safety and reliability of the steel grating.

[0041] See attached document Figure 2 Appendix Figure 3 and attached Figure 5 The positioning mechanism 2 in this utility model includes a base plate 201. The outer wall of the base plate 201 is fixedly connected to the inner wall of the outer frame 1. This connection method enables the base plate 201 to provide a stable installation foundation for the positioning mechanism 2, ensuring that the positioning mechanism 2 and the outer frame 1 become a stable whole. A retaining strip 202 is fixedly connected to the top of the base plate 201. Side strips 203 are fixedly connected to the front and rear sides of the inner wall of the outer frame 1. A retaining groove 204 is opened at the bottom of the flat steel 3. The retaining groove 204 is compatible with the retaining strip 202 at the top of the base plate 201. Through the cooperation of the two, the flat steel 3 is positioned in the vertical direction, ensuring the consistency of the installation height of the flat steel 3. Side grooves 205 are opened on the front and rear sides of the flat steel 3. The side grooves 205 cooperate with the side strips 203 on the inner wall of the outer frame 1 to accurately position the flat steel 3 in the horizontal direction, ensuring the accuracy of the installation position of the flat steel 3.

[0042] Specifically, during installation, the side grooves 205 on the front and rear sides of the flat steel 3 are first aligned with the side strips 203 fixed on the front and rear sides of the inner wall of the outer frame 1. The side strips 203 are embedded in the side grooves 205, thereby constraining the flat steel 3 in the front-rear direction. The flat steel 3 begins to move downward. At this time, it is necessary to ensure that the pre-cut slots 204 at the bottom of the flat steel 3 are precisely aligned with the clips 202 fixedly connected to the top of the base plate 201. As the flat steel 3 continues to fall to the designated position, the clips 202 are precisely embedded in the slots 204. The cooperation between the clips 202 and the slots 204 plays a positioning role for the flat steel 3 from the bottom, restricting the displacement of the flat steel 3 in the vertical direction and ensuring the consistency of the installation height of the flat steel 3.

[0043] See attached document Figure 1 and attached Figure 2 The top of the outer frame 1 is provided with a sealing edge 12, which effectively seals and protects the top of the outer frame 1, preventing debris from entering the internal structure of the steel grating, and at the same time enhancing the overall structural strength of the top of the outer frame 1. Screws 13 are threaded around the top of the sealing edge 12, which firmly fixes the sealing edge 12 to the top of the outer frame 1, ensuring that the sealing edge 12 will not loosen during use and continues to perform its protective and strength-enhancing functions. Screw holes 14 are provided around the top of the outer frame 1, which are compatible with the screws 13, providing a connection base for the installation of the screws 13 and ensuring a secure connection between the sealing edge 12 and the top of the outer frame 1. To ensure the stability of the connection, two lifting holes 15 are provided on the front and rear sides of the outer wall of the outer frame 1. The lifting holes 15 facilitate the lifting operation by inserting hooks into them when handling or installing the steel grating, greatly improving the convenience of handling and installation of the steel grating. The diameter of the multiple twisted square steels 10 is set to 7-9mm, and the diameter value of the twisted square steel 10 is set to 8mm. The twisted square steels 10 in this diameter range can effectively improve the torsional and shear resistance of the steel grating while enhancing the connection strength between the flat steels 3, ensuring the stability of the steel grating under complex stress conditions. The thickness of the multiple flat steels 3 is set to 4-6mm. The width of steel bar 3 is set to 28-32mm, and the thickness and width of flat steel bar 3 are set to 5mm and 30mm respectively. This thickness and width design allows flat steel bar 3 to withstand appropriate loads. As the main load-bearing component, it ensures the overall load-bearing capacity of the steel grating while taking into account material cost and weight. The thickness of multiple transverse reinforcing ribs 6 is set to 2-4mm, and the width of multiple transverse reinforcing ribs 6 is set to 18-22mm. The thickness and width of transverse reinforcing ribs 6 are set to 3mm and 20mm respectively. This specification of transverse reinforcing ribs 6 can effectively enhance the bending resistance of flat steel bar 3 in the transverse direction. The steel grating has the ability to improve its lateral load-bearing capacity and, together with the longitudinal reinforcing ribs 7, improve its overall strength. The thickness of the multiple hot-dip galvanized layers 4 is set to 75-85μm, and the thickness of the multiple electro-galvanized layers 5 is set to 15-25μm. The thickness values ​​of the hot-dip galvanized layers 4 and the electro-galvanized layers 5 are set to 80μm and 20μm respectively. The hot-dip galvanized layers 4 and the electro-galvanized layers 5 of this thickness work together. The hot-dip galvanized layers 4 isolate air and moisture to prevent the flat steel 3 from rusting, and the electro-galvanized layers 5 further fill the tiny pores of the hot-dip galvanized layers 4, enhance the overall anti-corrosion performance, and greatly extend the service life of the steel grating.

[0044] Specifically, the top edge sealing 12 of the outer frame 1 is securely installed with screws 13 and screw holes 14, sealing and protecting the top of the outer frame to prevent the intrusion of debris and enhance the strength of the top structure. The lifting holes 15 on the outer wall of the outer frame 1 facilitate lifting and greatly improve the convenience of handling and installation. The diameter of the twisted square steel 10 is set at 8mm, which effectively enhances the connection strength of the flat steel 3 and improves the steel grating's resistance to torsion and shear. The flat steel 3 is 5mm thick and 30mm wide, which reasonably bears the load and takes into account cost and weight. The transverse reinforcing ribs 6 are 3mm thick and 20mm wide, which efficiently enhance the transverse bending resistance of the flat steel and work together with the longitudinal reinforcing ribs 7 to improve the overall strength. The hot-dip galvanized layer 4 is 80μm thick and the electro-galvanized layer 5 is 20μm thick, which together isolate air and moisture, fill pores, and greatly extend the service life of the steel grating, making the steel grating perform excellently in terms of protection, strength, load-bearing capacity and durability.

[0045] Working Principle: The outer frame 1 serves as the basic structure of the entire steel grating, playing a crucial role in supporting and fixing the internal structure. It provides a stable installation platform for the flat steel 3 and other components. The flat steel 3 is the main load-bearing component. When the steel grating faces the risk of external environmental corrosion, the hot-dip galvanized layer 4 and electro-galvanized layer 5, which are sequentially fixed to its outer wall, prevent the flat steel 3 from rusting and enhance its overall corrosion resistance. When the steel grating is under pressure, multiple transverse reinforcing ribs 6 work together to significantly enhance the bending resistance of the flat steel 3 in the transverse direction. The longitudinal reinforcing ribs 7 are connected to the transverse reinforcing ribs 6, forming a stable grid-like reinforcement structure. This makes the steel grating less prone to deformation or breakage under high loads. Multiple... The weight-reducing holes 8 effectively reduce the overall weight of the steel grating without significantly affecting the strength of the flat steel 3, thus reducing material costs and facilitating handling and installation. The ribs 9 fixedly connected to the outside of the weight-reducing holes 8 strengthen the structure around the weight-reducing holes 8, compensating for the local strength loss caused by drilling. The twisted square steel 10 is fixedly connected to the inner wall of multiple flat steels 3, enhancing the connection strength between the flat steels 3 and making the entire steel grating a tighter whole. The anti-slip texture 11 increases the friction of the steel grating surface. In wet or oily environments, when pedestrians or objects walk or place on the steel grating surface, the anti-slip texture 11 can effectively prevent slipping or sliding, improving the safety and reliability of the steel grating.

[0046] Furthermore, during the installation of the flat steel 3, the side grooves 205 on the front and rear sides of the flat steel 3 are first precisely aligned with the side strips 203, allowing the side strips 203 to be embedded in the side grooves 205. The side strips 203 can constrain the flat steel 3 in the front and rear direction, preventing the flat steel 3 from shifting in the horizontal direction. With the close cooperation between the side strips 203 and the side grooves 205, the horizontal position of the flat steel 3 is calibrated. During the downward movement of the flat steel 3, the pre-cut slots 204 at the bottom of the flat steel 3 are precisely aligned with the locking strips 202. After the flat steel 3 falls to the bottom, the locking strips 202 are embedded in the slots 204, which plays a role in positioning the flat steel 3 from the bottom.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-strength I-shaped steel grating, comprising an outer frame (1) and flat steel (3), characterized in that: The outer wall of the flat steel (3) is fixedly connected to a hot-dip galvanized layer (4), the outer wall of the hot-dip galvanized layer (4) is fixedly connected to an electro-galvanized layer (5), the outer wall of the electro-galvanized layer (5) is fixedly connected to multiple transverse reinforcing ribs (6) on both the left and right sides, the outer wall of the multiple transverse reinforcing ribs (6) is fixedly connected to multiple longitudinal reinforcing ribs (7), the outer wall of the flat steel (3) is provided with multiple weight-reducing holes (8), the outer side of the multiple weight-reducing holes (8) is fixedly connected to hole ribs (9), the inner wall of the multiple flat steel (3) is fixedly connected to multiple twisted square steels (10), and the inner wall of the outer frame (1) is provided with multiple positioning mechanisms (2).

2. The high-strength I-type steel grating according to claim 1, characterized in that: The positioning mechanism (2) includes a base plate (201), the outer wall of the base plate (201) is fixedly connected to the inner wall of the outer frame (1), a clip (202) is fixedly connected to the top of the base plate (201), side strips (203) are fixedly connected to the front and rear sides of the inner wall of the outer frame (1), a slot (204) is opened at the bottom of the flat steel (3), and a side groove (205) is opened on the front and rear sides of the flat steel (3).

3. The high-strength I-type steel grating according to claim 1, characterized in that: Multiple anti-slip textures (11) are fixedly connected to the top of the multiple electro-galvanized layers (5), and the top of the outer frame (1) is provided with a sealing edge (12).

4. A high-strength I-type steel grating according to claim 3, characterized in that: The top four sides of the edge sealing (12) are all threaded with screws (13), and the top four sides of the outer frame (1) are all provided with screw holes (14).

5. A high-strength I-type steel grating according to claim 1, characterized in that: Two lifting holes (15) are opened on the front and rear sides of the outer wall of the outer frame (1), and the diameter of the multiple twisted square steels (10) is set to 7-9mm.

6. A high-strength I-type steel grating according to claim 1, characterized in that: The thickness of each of the multiple flat steel bars (3) is set to 4-6 mm, and the width of each of the multiple flat steel bars (3) is set to 28-32 mm.

7. A high-strength I-type steel grating according to claim 1, characterized in that: The thickness of each of the multiple transverse reinforcing ribs (6) is set to 2-4 mm, and the width of each of the multiple transverse reinforcing ribs (6) is set to 18-22 mm.

8. A high-strength I-type steel grating according to claim 1, characterized in that: The thickness of each of the multiple hot-dip galvanized layers (4) is set to 75-85 μm, and the thickness of each of the multiple electro-galvanized layers (5) is set to 15-25 μm.

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