昭和コンクリート工業 List of Products and Services

■To prevent the deterioration of concrete structures! ■Reinforced existing bridges damaged by salt damage and other factors while in use. ■Renewed the bridge with minimal traffic restrictions!!

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■It is a reinforced concrete precast box culvert of the National Box Culvert Association type, recommended according to JIS A 5372 specifications. ■Standardized dimensions range from width 0.6m × height 0.6m to width 3.5m × height 2.5m.

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By placing PC steel materials on the top and bottom plates, the thickness of the members can be reduced, resulting in a lighter weight compared to RC box culverts. Standard sizes range from width 1.8m × height 1.2m to width 5.0m × height 2.5m.

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■It can be installed by dropping it from above. ■Standardized dimensions are from 0.3m wide × 0.3m high to 0.6m wide × 0.6m high. For specifications other than the above, please consult us.

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■There are two types, K-type and T-type, depending on the required performance. 【K-type】 It has water-tightness that can withstand a water pressure of 0.06 MPa under level 2 seismic motion in a non-liquefied, non-inclined ground condition. 【T-type】 It has water-tightness that can withstand a water pressure of 0.06 MPa under level 2 seismic motion. ■By absorbing ground displacement at each joint of the product, it is possible to reduce the stress generated in the structure and minimize the amount of pull-out and bending angle occurring at each joint. ■The special rubber ring has a two-layer structure, with soft rubber covered by hard rubber on the outside, providing excellent followability, compression recovery, and wear resistance. ■High water-tightness can be achieved with the special rubber ring alone, eliminating the need for internal joint work.

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The "S-Hole - Large Assembled Box-Type Manhole" can accommodate level 2 seismic motions as indicated in the "Guidelines and Explanations for Seismic Measures of Sewer Facilities" published by the Japan Sewer Association in most cases. To meet the needs of the site, we have standardized 13 sizes ranging from 1000mm x 1000mm to 3500mm x 1500mm. Since the components are assembled sequentially from the foundation block to the manhole cover, on-site construction is easy and does not require skilled workers. The foundation block is divided into two parts, making it easy to install inflow and outflow pipes. As a factory-produced product with quality control, there is no variation in quality or strength.

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■Among large box culverts, it is applicable to relatively small cross-sections ranging from 4.0m to 6.0m in width. ■The components manufactured in upper and lower sections are integrated using mechanical joints and other methods.

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■ "Three-part large box culvert" is a box culvert that is divided into top slab components, side wall components, and cast-in-place bottom slab components. ■ After assembling the top slab and side wall components manufactured in the factory on-site, cast-in-place concrete is poured into the bottom slab section. ■ Among large box culverts, it is applicable to large cross-sections ranging from 5.5m to 10.0m in width, and the components manufactured in upper and lower parts are integrated using mechanical joints and other methods.

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■ It is applicable to large cross-sections ranging from 5.5m to 10.0m in width among large box culverts. ■ The components manufactured in sections are integrated using mechanical joints and other methods.

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■NETIS CB-080002-A (Publication Ended) ■This is a box culvert with a PRC structure using PC steel materials for the top slab and side wall components. ■It is applicable for ultra-large cross-sections ranging from 10.0m to 13.0m in width. (Please consult us if it exceeds 13.0m) ■The top slab and side wall components are made of precast concrete, while the bottom slab component is constructed with cast-in-place concrete. ■To shorten construction time, it is also possible to precast the bottom slab component. ■The angle can be freely set up to 75°. (Please contact us for angles less than 75°) ■It is widely adopted as an alternative to small-scale bridges at many sites.

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■ The "Oblique Super Wide Box" is applicable to ultra-large cross-sections ranging from 10.0m to 13.0m in width. ■ The oblique angle can be freely set within the range of 75° to 90°. ■ By setting the oblique angle to match intersecting rivers or roads, it enables highly flexible design to maximize land use. ■ It is also compatible with other forms such as portal culverts. ■ To accommodate faster construction, it is also possible to use precast components for the bottom slab.

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The "Top Slab Split Super Wide Box" features a structure that divides the top slab component into three parts, allowing for a box culvert with an internal width of 15 meters. To integrate the divided top slab components, PC steel materials are arranged using technology adapted from segmental girder bridges. By effectively introducing prestress with the arrangement of PC steel materials that correspond to the sectional forces, the thickness of the components is minimized. *For more details, please download the materials or contact us through our website.

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■ The FA Box - "Angled Large Box Culvert" is a large-section box that combines three segmented precast components with cast-in-place concrete. ■ By using a segmented structure for the top slab and side walls, it becomes easier to accommodate "angles." ■ By making the precast components into a slab structure and using cast-in-place concrete for the bottom slab, it enables the construction of an economically efficient large box. ■ The use of loop joints to integrate the precast components allows for easier construction and a reduction in construction time.

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■ It is possible to accommodate high soil coverage. ■ It has high constructability that allows for self-supporting. ■ The connection parts are rigidly bonded. ■ No special work is required.

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■This is a method of embedding rails in the foundation concrete and using steel balls and winches to pull and move concrete secondary products smoothly. ■Installation can be carried out smoothly even in urban areas and under elevated roads and railways where direct crane installation is not possible, as well as in places where temporary roads cannot be set up. ■There is no need to move the crane for lowering the products. ■This method can be used for laying products that come with foundation concrete, such as box culverts, L-shaped retaining walls, and flumes.

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■It is also possible to accommodate products such as angled cutting and short cutting processing. ■There are two types available depending on soil conditions and other factors.

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■It is also possible to accommodate products such as angled cutting and short cutting processing. ■There are two types with different upper load conditions.

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■NETIS CB-100045-A (Publication Ended) ■This is a road L-shaped retaining wall that has been standardized in accordance with the "Guidelines for Road Earthworks - Retaining Wall Works" and "Installation Standards and Explanations for Protective Fences," integrating a foundation for vehicle protective fences. ■By integrating the L-shaped retaining wall with the foundation for vehicle protective fences, significant cost reduction and shortening of construction time are achieved, while maximizing the road width. ■It is possible to process the top edge with a slant cut, allowing installation without tilting the product even on a road longitudinal slope of about 15%. ■The standard product can accommodate a horizontal alignment with a minimum radius of approximately R=20m. ■Standardized heights range from H=1,000 to 4,000.

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■ This is an L-shaped retaining wall standardized in accordance with the "Guidelines for Road Earthworks - Retaining Walls," which allows for the installation of pedestrian and bicycle fences or barriers at the top of the wall. ■ A horizontal load of 0.4 kN/m is assumed for the protective fence. ■ There are two types available: one for sidewalk loads and one for roadway loads. ■ In addition to road retaining walls, it has various applications such as parking lots and outfield fences in baseball fields. ■ Post holes are provided at intervals of 1.0 m. ■ It is standardized from H800 to H3,500. This is an L-shaped retaining wall that allows for the installation of pedestrian and bicycle fences or barriers at the top of the wall.

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The "SL Retaining Wall - Multi SL-F" is an L-shaped retaining wall for road use with a protective fence foundation, designed to accommodate any longitudinal slope through sloped processing at the top of the wall (supports slopes up to 15%*1). By integrating the retaining wall and the protective fence foundation, we have significantly simplified the installation work for the protective fence and shortened the construction period. Since posts can be installed at the top of the retaining wall, the road width can be maximized. *Thanks to the specially shaped base plate, it can flexibly accommodate horizontal curves. Post holes are provided at 1-meter intervals, allowing for compatibility with protective fences and fences with post spacings of 2 meters and 3 meters. Under certain conditions, it can also accommodate slopes greater than 15%.

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■ The "SL Retaining Wall - SL-J" is one of the largest segmented all-precast L-shaped retaining walls in history, with a maximum wall height of 10.0m. ■ It can be applied to wall heights ranging from 5.0m to 10.0m. ■ It allows for easy construction without the need for cast-in-place concrete, achieving a reduction in construction time and labor efficiency on site. ■ It is designed to withstand Level 2 seismic motion (Kh=0.24) and can accommodate top edge sloping (longitudinal gradient). ■ It is possible to install a fence (protective barrier for pedestrians and cyclists) at the top edge, and it can also accommodate a cast-in-place concrete type for the base slab. * Fence post mounting holes can be installed at the top edge as needed.

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■ The "SL Retaining Wall / SL-R" is an effective reverse L-shaped retaining wall for situations where it is difficult to install a heel slab due to boundary lines of the retaining wall site or nearby structures. ■ Being a precast product, it significantly shortens construction time and realizes labor-saving and manpower-reducing on-site work. ■ The sloped processing at the top of the retaining wall not only accommodates longitudinal slopes (up to a 15% slope) but also ■ The special trapezoidal shape of the base slab allows for flexible adaptation to horizontal curves. ■ It is also possible to provide fence installation holes at the top of the retaining wall, making it adaptable to a wide range of site conditions. *1 Depending on conditions, it may also accommodate slopes exceeding 15%. *2 Fence hole adaptation is handled on an individual basis.

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The "PCa Rigid Protective Wall" is a product that significantly shortens construction time by integrating a concrete rigid protective fence with an L-shaped retaining wall. Since dangerous tasks such as rebar assembly and formwork installation at heights are no longer necessary, safety on site is improved. There are two types available: a 250mm type for the top thickness and a 300mm type that allows for the installation of sound barriers, with standardized retaining wall heights ranging from 1.5m to 3.5m. Stability considerations are made in a 10m connected state, while component evaluations are checked at the product length (2.0m). *Note: It does not support sloped cuts at the top. *Note: It can also accommodate short-cut processed products.

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■This is a ministerial certified product for land development under Article 14 of the Land Development Regulation Enforcement Order. ■It is an L-shaped retaining wall for residential land that is designed to withstand large-scale seismic motion (design horizontal seismic intensity Kh=0.25). ■It can be used on sites with a wall height of up to 3 meters. ■It can also be used for road purposes with separate design. ■We also offer products specifically for corners.

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The "SL Type IV Corner" is a corner product of L-shaped retaining walls for residential land that is designed to withstand large-scale seismic motions. It can be used on sites with a wall height of up to 3 meters. With separate design, it can also be used for road applications.

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■ "High Touch Wall (Ministerial Certification for Major Earthquakes)" is a ministerial certified product for land development according to Article 14 of the Land Development and Other Regulations Enforcement Order. ■ It can be used on sites with a retaining wall height of 3.0m to 5.0m. ■ Ribs are provided on the back to enhance the rigidity of the retaining wall.

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The "High Touch Wall (Ministerial Certification for Medium Earthquake Use)" is a ministerially certified product for land development according to Article 14 of the Land Development and Other Regulations Enforcement Order. It can be used on sites with a retaining wall height of 3.0m to 5.0m. Ribs are provided on the back to enhance the rigidity of the retaining wall.

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■NETIS CB-080014-A (Discontinued) ■This is a retaining wall that obtained construction technology certification from the Public Works Research Center in October 2007. ■The vertical wall section of the cast-in-place reinforced concrete retaining wall is made of precast reinforced concrete products, achieving efficiency in construction and improvement in quality. Depending on site conditions, the base slab can also be proposed as precast. ■The product features a wide opening for the retaining wall, making on-site construction such as rebar assembly and concrete pouring easier. ■Since the front wall thickness of the product is the same for all types, construction from the back is easy, and block work is not required. ■The front of the product is finished for aesthetic purposes, accommodating landscape conditions. ■The specifications of the product can be selected according to the distribution of earth pressure, allowing for economical design. ■The maximum applicable height for the retaining wall is approximately 14 meters. (Please consult regarding applicable height.)

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■NETIS CB-040038-A (Publication Period Ended) ■This is a retaining wall that obtained construction technology certification from the Public Interest Incorporated Foundation Civil Engineering Research Center in March 2004. ■Due to its flexible structure, it reduces the stress generated by the slight movement of the wall against soil pressure during an earthquake, thereby preventing cracking and collapse of the wall. ■The ground reaction force during an earthquake is relatively small, and it demonstrates adaptability to differential settlement of the foundation ground and backfill soil, maintaining the overall safety of the wall. ■The layer of single-sized crushed stone has extremely high drainage capacity, which inevitably stabilizes the backfill soil. ■Since there is almost no work involving rebar, concrete, or formwork at the construction site, significant reductions in construction time and improvements in cost-effectiveness can be achieved. ■The product can be used in an inverted manner, making curved construction easy. ■The stepped shape has a three-dimensional aesthetic, allowing for planting and natural greening using each step, which contributes to ecosystem preservation. ■The maximum wall height in construction records is 21m. (Please consult us regarding applicable heights) *For more details, please download the materials or contact us through our website.*

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■NETIS CB-100043-A (Publication Ended) ■This is a large block retaining wall type that stacks large precast blocks at a slope of 1:0.5 (standard) and fills the blocks with concrete. ■The product's retaining wall has a large opening, allowing for integration with cast-in-place concrete. ■It is easy to set the thickness of components according to design conditions, making it possible to create an economical retaining wall. ■By using dedicated hardware, the product can be lifted horizontally. ■The product lengths are available in 2m and 1m, and the product heights are 1m and 0.5m, allowing for flexible adaptation to site configurations. ■The maximum applicable retaining wall height is approximately 15m. (Please consult regarding applicable heights.)

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★Lightweight components weighing around 600kg, easy to handle!! ■ There are few transportation restrictions, making it possible to transport and construct in narrow spaces. ■ Construction can be done with a crane-equipped backhoe, allowing for easy maneuverability. *1 ★Half precast structure!! ■ Significantly shortens construction time and achieves labor-saving and efficiency in construction. ■ Since it only involves stacking blocks, it minimizes the need for special tasks like formwork. *2 ■ The surface becomes precast material, allowing for a beautiful and high-quality finish. ★Thorough pursuit of construction efficiency!! ■ There are few types of blocks, making product management easy. ■ By setting the standard product length to 3.0m, construction efficiency can be greatly increased. ■ The use of joint pins makes alignment easy. *For vertical wall sections ■ Unifying the bolt specifications improves workability. ■ The special drainage hole shape also makes the installation of drainage pipes easy. ■ The sloped wall sections can also serve as scaffolding. *1 There may be restrictions depending on the working radius, etc. *2 Formwork for the ends and top concrete will be necessary.

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Type 1 is primarily installed on sidewalks. Type 3 is rarely adjacent to vehicles, and even if vehicles do pass by, it is installed parallel to the roadway in places where they would travel at low speeds, such as during temporary stops.

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■Type 1: Primarily installed on sidewalks. ■Type 2: It is rare for vehicles to run adjacent to it, and even when they do, it will be installed parallel to the roadway in places where vehicles travel at low speeds, such as during temporary stops.

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■It is possible to set the drainage slope appropriately and form a vertical rectangular water flow section. ■The structure is designed for a 25-ton vehicle. ■Due to the frame structure, the overall strength is balanced. ■To support product arrangement suitable for the site, the side wall height is standardized in 10 cm increments. ■A wide variety of types are available, including for fractional adjustments, corner cuts, support line installations, and crossings.

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It is a product that possesses five features: economic efficiency, functionality, high constructability, high quality, and beauty.

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■Single-sided pedestrian-vehicle boundary block: Used for boundaries with a height difference between pedestrian and vehicle areas. ■Double-sided pedestrian-vehicle boundary block: Used for boundaries without a height difference between pedestrian and vehicle areas. ■Property boundary block: Primarily used for the boundary between sidewalks and private land.

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■L-shaped drainage channel JISA5372 - Mainly used for mount-up types with a height of 100mm or less. ■L-shaped drainage channel JISA5371 - It is rare for vehicles to run adjacent to each other, and even if they do, it is in places where they travel at low speeds, such as temporary stops, and is installed parallel to the roadway.

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■This is a precast protective fence foundation standardized in accordance with the "Installation Standards and Explanations for Protective Fences." ■It is standardized in accordance with the "Installation Standards and Explanations for Protective Fences." ■It corresponds to protective fence types A (impact load P=50kN), B, and C (impact load P=30kN). ■This product can bear the loads acting on the protective fence by itself. ■It accommodates a planar alignment with an outer bending radius of R=8m and an inner bending radius of R=12m for standard products. ■The basic extension of the foundation is 8m or more. (Please consult us for lengths less than 8m.) ■Even if the pre-guard is damaged, partial replacement is possible.

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■ It is standardized in accordance with the "Installation Standards and Explanations for Protective Fences." ■ It corresponds to protective fence types A (impact load P=55kN), B, and C (impact load P=30kN). ■ It has a shape reminiscent of a bicycle chain, allowing for flexible adaptation to curves. ■ It can also be used as a temporary protective fence foundation for lane restrictions and lane guidance.

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■Reduction of environmental impact on the mountain and valley sides - Due to the cantilever structure, excavation of the mountain side is unnecessary, minimizing the impact on the valley side, such as rivers and waterways. ■Early traffic opening - By using precast products, temporary construction can be reduced, leading to a shorter construction period. ■Cost reduction possible - By removing part of the existing retaining wall's top and installing blocks, reconstruction of the retaining wall is unnecessary, resulting in cost reduction. ■Compatible with vehicle protective fences - It is compatible with vehicle protective fences (Type B and Type C), and the installation span for the P-type support allows for compatibility with both vehicle and pedestrian protective fences. ■Road widening according to regional characteristics - Depending on regional characteristics, it can accommodate specifications for either large vehicles or medium vehicles.

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■Stable Structure - The structure integrates vertical and horizontal directions by connecting products with anchor bolts installed post-construction in the foundation concrete poured on-site. - Using precast foundations allows for a completely dry construction method. ■Excellent Safety - Stability is achieved as the weight of the foundation concrete and the soil on the bottom plate resist tipping and sliding. - The sidewalk area can incorporate circular anti-slip patterns to prevent slipping. ■Improved Drainage - With a 2.0% slope in the sidewalk area and drainage holes in the side walls and joints, drainage is enhanced, making it difficult for water to accumulate behind the side walls.

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■ Significant shortening of construction time is possible. ■ Next work can be carried out immediately after block installation. ■ Blocks can be connected with bolts. ■ Smooth construction is possible. ■ The structure can absorb construction variations in the position of the drainage manhole up to 5 cm in either direction. ■ Space for installing electrical conduits, drainage pipes, etc., inside the auditor's passage is secured to be equal to or greater than that of conventional on-site casting. ■ The structure is designed to minimize the likelihood of debris getting caught in the slits. ■ The circular waterway section considers T-25 direct and side load in the longitudinal direction. ■ The shape is designed with consideration for construction machinery (set form, slip form).

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■This is a standard of the Agricultural Civil Engineering Association. ■It standardizes widths from 1.0m to 3.0m and heights from 0.7m to 2.0m. ■The types are classified based on the superimposed load acting on the horizontal line at the top of the side wall and the soil conditions.

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■This is the standard of the Agricultural Civil Engineering Association. ■It standardizes widths from 1.0m to 3.0m and heights from 0.7m to 2.0m. ■The types are classified based on the superimposed load acting on the horizontal line at the top of the side wall and the soil conditions.

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■This is a lightweight three-sided water channel with a thin material thickness. ■The standard dimensions are a top width of 0.6m × height of 0.8m to a top width of 2.0m × height of 1.5m.

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