オカグレート List of Products and Services

We would like to introduce the materials of the steel plate products we handle. In addition to the "checkered steel plate," which is well-known for its anti-slip effect, we also offer "patterned steel plates" and "striped steel plates," which have even greater anti-slip properties and excellent design. Furthermore, surface treatments include "hot-dip galvanized finish" and "SG coating" for corrosion resistance, as well as "rust-proof color painting" to coordinate various construction sites. We cater to the Ministry of Land, Infrastructure, Transport and Tourism, prefectures, public works, cities, steep slopes, vertical drainage, and splash prevention boards. In addition to steel, we also provide stainless steel checkered plates, patterned FRP, and aluminum checkered plates (5 stripes). 【Features】 ■ Steel "checkered steel plate" (thickness 3.2 mm, 4.5 mm, 6.0 mm, 9.0 mm, etc.) - Exhibits high anti-slip effect ■ Steel "patterned steel plate" (thickness 2.3 mm, 3.2 mm, 4.5 mm, etc.) - Features random unevenness on the surface - Particularly excellent anti-slip effect when wet with oil or water ■ Steel "striped steel plate" - Equipped with ribbing in line on the surface - The direction of the stripes smooths the flow, while perpendicular to the stripes provides a strong grip effect *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce the processing of materials for our steel plate products. Including frames, fabricated hardware, and various steel processed products. We can also accommodate laser processing, bending processing, and various treatments tailored to the construction environment. As a company, we continue to pursue convenience in the environments and locations where our products are used, striving to provide better proposals and products. Our products are frequently adopted in disaster recovery, agriculture, and forestry-related projects by the Ministry of Land, Infrastructure, Transport and Tourism, prefectures, prefectural civil engineering offices, cities, NEXCO, water resources, and more. Please allow us to assist you in solving your problems. 【Features】 ■ Accommodations for laser processing and bending processing ■ Various treatments tailored to the construction environment *For more details, please refer to the PDF materials or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce an example of specifications for our steel plate products used as covers for manholes and gutters, including their shapes. As basic shapes, we handle "single-piece type," "two-piece type," "circular type," and "irregular type." (Please also consult us about "splash prevention plates" for vertical drainage gutters.) Additionally, the handle shapes include a "simple handle" where the handle part protrudes upward for easy lifting during use, and a "recessed handle" that can be stored without protruding. We can accommodate steel materials with hot-dip galvanized finishes, rust-resistant coatings (such as red rust color or gray), and tar epoxy coatings. *Plating certificates can be obtained. 【Handle Features】 ■ Simple Handle - The handle part protrudes upward for easy lifting during use. ■ Recessed Handle - Can be stored without the handle part protruding. - Suitable for use in areas where a flat surface is desired due to the absence of protrusions. ■ T-Type Handle (with anti-splashing hardware) - The handle can rotate 360°, allowing it to be stored inside while also attaching a clip to prevent it from bouncing up. *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce the "Standard Manhole Covers (made of corrugated steel plate)" that we handle. For single-piece use, the "FP-1 type" is available in six sizes with inner diameters of 400×400mm to 900×900mm. Additionally, we offer a wide range of sizes for the two-piece "FP-2 type." These are used in various applications such as the Ministry of Land, Infrastructure, Transport and Tourism, prefectural civil engineering, municipalities, NEXCO, steep slope countermeasures, vertical drainage, and anti-splash boards. They are widely utilized in water resource management, disaster recovery, and agriculture and forestry. Finishes include hot-dip galvanized coating, rust prevention paint, and tar epoxy paint. Please consult us for other surface treatments. *Hot-dip galvanizing = JIS H8641 HDZT-56, HDZT-63, HDZT-70, HDZT-77, etc. (Certificates of plating (plating certificates) can be obtained.) Please feel free to contact us when you need our services. 【Product Lineup (Partial)】 ■FP-1 Type (Single-piece) ・FP1-A ・FP1-B ・FP1-C ・FP1-D ・FP1-E ・FP1-F *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

"Fine Grip" is an application product designed with safety in mind, utilizing various techniques for processing steel plates. By creating protruding holes on the surface of various steel plates, it provides a strong anti-slip effect. It is particularly suitable for walkways in facilities such as chemical plants that require high safety standards. Additionally, since the hole positions can be adjusted, it is possible to arrange them to avoid interference with substructures and to process them along with accessories such as handles. 【Features】 ■ Provides a strong anti-slip effect ■ Particularly suitable for walkways in facilities such as chemical plants that require high safety standards ■ Hole positions can be adjusted ■ Patterns considering drainage combined with standard round holes or elongated holes can also be produced ■ Can be used in combination with grating, taking strength into account *For more details, please refer to the PDF materials or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

"Amenity Grating" is an applied product that utilizes various steel plate processing technologies. By laser processing illustrations or marks onto patterned steel plates welded to the surface, it can promote the image of the local environment and landscape. The surface employs patterned steel plates, achieving high slip resistance. The uneven patterns provide significant safety under various conditions. [Features] - Illustrations or marks are laser processed onto patterned steel plates welded to the surface. - Can promote the image of the local environment and landscape. - Compatible with various types of grating. - Available with zinc plating finish, as well as Kenboizing treatment. - Achieves high slip resistance. *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

"OG Super High Tensile" is a high-strength stainless steel grating with a strength approximately twice that of SUS304. It allows for thinner profiles, contributing to weight reduction, while maintaining corrosion resistance equal to or greater than SUS304, leading to longer service life and reduced repair costs for applications such as drainage and other uses. Design conditions vary depending on the application categories such as general drainage, catch basins, U-shaped gutters, and sidewalks. Please feel free to contact us when making inquiries. 【Features】 ■ Uses high-strength steel materials ■ Achieves both improved durability and weight reduction through thinner profiles ■ Has corrosion resistance equal to or greater than SUS304 ■ Contributes to the longevity of equipment and reduction of repair costs *For more details, please refer to the PDF materials or feel free to contact us.

• Grating

We would like to introduce the high-strength stainless steel grating "OG Super Hi-Ten" <for general drainage and recessed type> handled by Okagreat Co., Ltd. Custom dimensions tailored to site-specific drainage channels and various widths are also available. Developed using the dual-phase stainless steel "SUS821L1," the "OG Super Hi-Ten" boasts a strength approximately twice that of SUS304, making it a high-strength stainless steel grating. It allows for thinner designs, contributing to weight reduction, while maintaining corrosion resistance equal to or greater than SUS304, thus extending the lifespan of equipment and reducing repair costs. Please feel free to consult us when you need assistance. 【Features】 ■ Safety (high-strength stainless steel) ■ Reliability (SUS821L1) ■ Strength (up to maximum T-20 load) ■ Lightweight (can be made thinner than conventional grating) ■ Aesthetic (corrosion resistance) ■ Damage prevention (approximately twice the strength of SUS304) *For more details, please refer to the PDF document or feel free to contact us.

• Grating

We would like to introduce the high-strength stainless steel grating "OG Super High Ten" <for trench covers, bolt-fixed type> handled by Okagreat Co., Ltd. Custom dimensions can be ordered to match site-specific drainage channels and various trench widths. Developed using the dual-phase stainless steel "SUS821L1," the "OG Super High Ten" boasts a strength approximately twice that of SUS304, making it a high-strength stainless steel grating. It allows for thinner designs, contributing to weight reduction, while maintaining corrosion resistance equal to or greater than SUS304, thereby extending the lifespan of equipment and reducing repair costs. Please feel free to consult us when you need assistance. 【Features】 ■ Safety (high-strength stainless steel) ■ Reliability (SUS821L1) ■ Strength (up to maximum T-20 load) ■ Lightweight (can be made thinner than conventional gratings) ■ Aesthetic (corrosion resistance) ■ Damage prevention (approximately twice the strength of SUS304) *For more details, please refer to the PDF document or feel free to contact us.

• Grating

We would like to introduce the high-strength stainless steel grating 'OG Super High Ten' <for drainage pits and drop-in type> handled by Okagreat Co., Ltd. Custom sizes can be made to order to match site-specific drainage pits or various opening dimensions. Developed using the dual-phase stainless steel "SUS821L1," 'OG Super High Ten' boasts a strength approximately twice that of SUS304, making it a high-strength stainless steel grating. It allows for thinner designs, contributing to weight reduction, while maintaining corrosion resistance equal to or greater than that of SUS304, thus extending the lifespan of equipment and reducing repair costs. Please feel free to consult us when you need assistance. 【Features】 ■ Safety (high-strength stainless steel) ■ Reliability (SUS821L1) ■ Strength (up to maximum T-20 load) ■ Lightweight (can be made thinner than conventional grating) ■ Aesthetic (corrosion resistance) ■ Damage prevention (approximately twice the strength of SUS304) *For more details, please refer to the PDF document or feel free to contact us.

• Grating

"OG Super High Tensile" is a high-strength stainless steel grating with a strength approximately twice that of SUS304. It allows for thinner designs, contributing to weight reduction, and possesses corrosion resistance equal to or greater than SUS304, leading to longer service life of equipment and reduced repair costs. It is suitable for U-shaped gutters for concrete precast products and for convenient drainage systems. It can be placed on concrete U-shaped gutters with two-sided flanges or can be used on site-cast ditches. Please feel free to contact us when you need assistance. 【Features】 ■ Uses high-strength steel materials ■ Achieves both improved durability and weight reduction through thinner designs ■ Has corrosion resistance equal to or greater than SUS304 ■ Contributes to the long service life of equipment and reduced repair costs 【Characteristics】 ■ Safety (high-strength stainless steel) ■ Reliability (SUS821L1) ■ Strength (up to maximum T-14 load) ■ Lightweight (can be made thinner and lighter than conventional gratings) ■ Aesthetic (corrosion resistance) ■ Damage prevention (approximately twice the strength of SUS304) *For more details, please refer to the PDF document or feel free to contact us.

• Grating

We would like to introduce our stainless steel (SUS304) grating, specifically the "integrated trench cover" in the flat bar type, which we handle. The grating surface is available in three types: plain type (OSG), non-slip type (ONG), and knurled type (ORG). The pitch of the main components (main bars) is as follows: P30 (gap 26 mm) P22 (gap 18 mm) P15 (gap 11 mm) P13 (gap 9 mm) P11 (gap 7 mm) Our standard products are available for trench widths ranging from 100 mm to 450 mm. We can also accommodate special trench widths, so please feel free to contact us for inquiries. 【Partial Lineup】 ■OSG・ON(R)G-15-15 ■OSG・ON(R)G-20-15 ■OSG・ON(R)G-15-20 ■OSG・ON(R)G-20-20 ■OSG・ON(R)G-25-20 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, designed for general drainage, in the I-bar type "integrated drainage cover." The grating surface is available in two types: plain type (OISG) and non-slip type (OING). The pitch of the main components (main bars) is as follows: P30 (gap 25 mm) P22 (gap 18-17 mm) P15 (gap 11-10 mm) P13 (gap 9-8 mm) Our standard products are available for drainage widths ranging from 100 mm to 450 mm. We can also accommodate special drainage widths, so please feel free to contact us for inquiries. 【Partial Lineup】 ■OISG・OING-15-15 ■OISG・OING-20-15 ■OISG・OING-15-20 ■OISG・OING-20-20 ■OISG・OING-25-20 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating for general drainage, specifically the "integrated, trench cover, bolt-fixed" flat bar type that we handle. The grating surface is available in three types: plain type (OSO), non-slip type (ONO), and knurled type (ORO). The pitch of the main components (main bars) is as follows: P30 (gap 26 mm) P22 (gap 18 mm) P15 (gap 11 mm) P13 (gap 9 mm) P11 (gap 7 mm) Our standard products are available for trench widths ranging from 100 mm to 400 mm. We can also accommodate special trench widths, so please feel free to contact us for inquiries. 【Partial Lineup】 ■OSO・ON(R)O-15-15 ■OSO・ON(R)O-20-15 ■OSO・ON(R)O-15-20 ■OSO・ON(R)O-20-20 ■OSO・ON(R)O-25-20 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, bolt-fixed type with I-bar, known as "integrated bolt-fixed type for trench covers." The grating surface is available in two types: plain type (OISO) and non-slip type (OINO). The pitch of the main components (main bars) is as follows: P30 (gap 25 mm) P22 (gap 18-17 mm) P15 (gap 11-10 mm) P13 (gap 9-8 mm) Our standard products are available for trench widths ranging from 100 mm to 450 mm. We can also accommodate special trench widths, so please feel free to contact us for inquiries. 【Partial Lineup】 ■OISO・OINO-15-15 ■OISO・OINO-20-15 ■OISO・OINO-15-20 ■OISO・OINO-20-20 ■OISO・OINO-25-20 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, flat bar type for drainage pits, which we handle. The grating surface is available in three types: plain type (OSM), non-slip type (ONM), and knurled type (ORM). The pitch of the main components (main bars) is as follows: P30 (gap 26 mm) P22 (gap 18 mm) P15 (gap 11 mm) P13 (gap 9 mm) P11 (gap 7 mm) Our standard products range from drainage hole openings of 250×250 mm to 600×600 mm. We can also accommodate special groove widths. 【Partial Lineup】 ■ OSM・ONM・ORM-15-30 ■ OSM・ONM・ORM-20-30 ■ OSM・ONM・ORM-25-30 ■ OSM・ONM・ORM-32-30 ■ OSM・ONM・ORM-45-30 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, I-bar type for drainage pits, which is available in a "built-in type for drainage pits" and "drop-in type." The grating surface is available in two types: plain type (OISM) and non-slip type (OINM). The pitch of the main components (main bars) is as follows: P30 (gap 25 mm) P22 (gap 18-17 mm) P15 (gap 11-10 mm) P13 (gap 9-8 mm) Our standard products are available for pit openings ranging from 250×250 mm to 600×600 mm. We can also accommodate special pit openings, so please feel free to contact us if you have any requests. 【Lineup (partial)】 ■OISM・OINM-15-30 ■OISM・OINM-20-30 ■OISM・OINM-25-30 ■OISM・OINM-32-30 ■OISM・OINM-38-30 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel grating and bolt-fixed flat bar type for drainage pits, known as "integrated bolt-fixed type for drainage pits." The surface of the grating is available in three types: plain type (OSOM), non-slip type (ONOM), and knurled type (OROM). The pitch of the main components (main bars) is as follows: P30 (gap 26 mm) P22 (gap 18 mm) P15 (gap 11 mm) P13 (gap 9 mm) P11 (gap 7 mm) Our standard products range from drainage pit openings of 250×250 mm to 600×600 mm. We can also accommodate special groove widths. 【Lineup (partial)】 ■ OSOM・OS(R)OM-15-30 ■ OSOM・OS(R)OM-20-30 ■ OSOM・OS(R)OM-25-30 ■ OSOM・OS(R)OM-32-30 ■ OSOM・OS(R)OM-38-30 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, I-bar type for drainage pits, featuring a "built-in, drainage pit, bolt-fixed" design. The grating surface is available in two types: plain type (OIOSM) and non-slip type (OIONM). The pitch of the main components (main bars) is as follows: P30 (gap 25 mm) P22 (gap 18-17 mm) P15 (gap 11-10 mm) P13 (gap 9-8 mm) Our standard products range from drainage hole openings of 250×250 mm to 600×600 mm. We can also accommodate special drainage hole openings, so please feel free to contact us for inquiries. 【Product Lineup (partial)】 ■OIOSM・OIONM-15-30 ■OIOSM・OIONM-20-30 ■OIOSM・OIONM-25-30 ■OIOSM・OIONM-32-30 ■OIOSM・OIONM-38-30 *For more details, please refer to the PDF document or feel free to contact us.

• Inspection hatches, manhole covers, and ditch covers

We would like to introduce our stainless steel (SUS304) grating, flat bar type for U-shaped gutters, which we handle. The grating surface is available in three types: plain type (OSU), non-slip type (ONU), and knurled type (ORU). The pitch of the main components (main bars) is as follows: P30 (gap 26 mm) P22 (gap 18 mm) P15 (gap 11 mm) P13 (gap 9 mm) P11 (gap 7 mm) We offer standard products ranging from U-90 to U-360 mm. Additionally, we can accommodate other sizes and special groove widths. Please feel free to contact us for inquiries. 【Lineup (partial)】 ■OSU・ON(R)U-15-9 ■OSU・ON(R)U-15-10 ■OSU・ON(R)U-15-12 ■OSU・ON(R)U-20-12 ■OSU・ON(R)U-15-15 *For more details, please refer to the PDF document or feel free to contact us.

• Grating