Shear Bolt MBT Rebar Coupler for Reinforcing Steel Bar Connection
Product Type: Shear Bolt MBT Rebar Coupler, Lockshear Bolt Coupler, Mechanical Rebar Splice, Reinforcement Bar Connector
Standards: ACI 318 · ISO 15835 · EN 1992-1-1 · BS 8110 · JGJ 107-2016 · ASTM A1034
Applications: High-Rise Buildings · Bridges & Infrastructure · Precast Concrete · Tunnels · Nuclear Facilities · Seismic Zones
About TARCO Industry — Your Trusted Shear Bolt MBT Rebar Coupler Manufacturer
As a professional shear bolt MBT rebar coupler manufacturer, TARCO Industry produces high-quality mechanical rebar splicing systems for reinforcing steel bar connection.
Furthermore, our factory operates a complete production line from high-strength steel forging to precision machining and lockshear bolt assembly.
Consequently, this ensures consistent quality, competitive factory-direct pricing, and reliable global supply.
Therefore, the company engineers its MBT rebar coupler products to meet the rigorous demands of high-rise buildings, bridges, precast concrete, and seismic zone projects across international markets.
In addition, as a direct rebar coupler factory, TARCO Industry eliminates middlemen and provides OEM/ODM services.
Moreover, we export our shear bolt rebar coupler and mechanical splice products to customers in North America, Europe, Australia, New Zealand, Southeast Asia, the Middle East, and Oceania.
Consequently, we provide full compliance documentation for each order. Specifically, you can explore our Rock Wool Blanket and Rock Wool Pipe Insulation for more construction solutions.
Product Overview: Shear Bolt MBT Rebar Coupler
Shear bolt MBT rebar coupler (also known as lockshear bolt coupler or mechanical rebar splice) represents a mechanical connection system used to join reinforcing steel bars end-to-end in reinforced concrete construction.
Specifically, the coupler consists of a high-strength steel sleeve with internal serrated saddles and lockshear bolts that are tightened to embed into the rebar surface.
Consequently, this mechanical splicing method eliminates the need for traditional lap splicing, reducing rebar congestion and improving structural continuity.
TARCO Industry produces its shear bolt MBT rebar coupler from high-strength S45C and 40Cr carbon steel, forged and precision-machined to exact tolerances.
During production, we assemble the coupler with the correct number of lockshear bolts and two serrated strip saddles inside the sleeve.
Ultimately, the product is delivered ready for installation with no bar end preparation required, enabling rapid and reliable field assembly.
Key Features & Benefits of Shear Bolt MBT Rebar Coupler
Furthermore, the shear bolt system requires no threading or bar-end preparation, significantly reducing installation time and labor costs.
Additionally, the coupler allows connection without rotating the reinforcing bar, making it ideal for fixed bars and confined spaces.
Moreover, the lockshear bolts are tightened until the heads shear off at a predetermined torque, providing instant visual verification of correct installation.
Consequently, the internal serrated saddles embed securely into the rebar surface, ensuring full force transmission and structural integrity.
Therefore, the system achieves 125% of the specified yield strength of the connected rebar per ACI 318 Type 1 requirements.
In addition, the coupler is suitable for tension, compression, and seismic applications when tested to ACI 318 Type 2 requirements.
Furthermore, the S45C and 40Cr steel construction ensures fatigue resistance for high-performance in seismic zones.
Finally, the product is available in a comprehensive range of sizes from 12mm to 57mm to suit all common rebar diameters.
Installation Process — Simple, Fast, Reliable
Furthermore, the shear bolt MBT rebar coupler is designed for rapid installation with no special equipment required.
Additionally, the installation process involves inserting the rebar into the coupler and tightening the lockshear bolts until the heads shear off.
Moreover, the bolt heads shearing off provides a clear visual indicator that the correct torque has been applied.
Consequently, no thread cutting, bar end preparation, or bar rotation is required, saving significant time on site.
The following table summarizes the step-by-step installation process.
| Step | Process | Details |
|---|---|---|
| 1 | Prepare Rebar | Clean the rebar ends; no threading or machining required |
| 2 | Insert Rebar | Insert rebar into the coupler until it contacts the central stop |
| 3 | Tighten Bolts | Finger-tighten lockshear bolts in an alternating pattern |
| 4 | Final Tightening | Fully tighten bolts with a ratchet, electric, or pneumatic wrench until heads shear off |
| 5 | Visual Inspection | Sheared bolt heads confirm correct torque and complete installation |
Specifically, the use of impact power tools is not recommended as they may damage the threads during installation.
Therefore, TARCO Industry recommends using a steady tightening force with a ratchet wrench or electric/pneumatic wrench designed for controlled torque delivery.
Technical Specifications — Shear Bolt MBT Rebar Coupler
Physical & Mechanical Properties
Furthermore, the following table details the physical and mechanical properties of our shear bolt MBT rebar coupler.
| Parameter | Unit | Value / Range | Standard |
|---|---|---|---|
| Coupler Material | — | S45C / 40Cr High-Strength Carbon Steel | — |
| Bolt Material | — | Alloy Steel, Hardened | — |
| Rebar Size Range | mm | 12 – 57 (#4 – #18) | ASTM A615 / A706 |
| Tensile Strength (Type 1) | — | ≥ 125% of specified yield strength | ACI 318 |
| Tensile Strength (Type 2) | — | ≥ Specified tensile strength of rebar | ACI 318 |
| Slip (Type 1) | mm | ≤ 0.25 for #14 bars and smaller | ACI 318 / TxDOT DMS-4510 |
| Slip (Type 1, #18 bars) | mm | ≤ 0.75 | ACI 318 / TxDOT DMS-4510 |
| Fatigue Strength | — | 10,000 cycles at ±170 MPa | TxDOT DMS-4510 |
| Cyclic Loading | — | 100 cycles at 5% – 90% yield strength | TxDOT DMS-4510 |
| Operating Temperature | °C | -20 to +150 | — |
| Working Life | Years | ≥ 100 | ETA |
Fire Performance & Safety
Additionally, the following table outlines the fire performance and safety standards for the shear bolt MBT rebar coupler.
| Parameter | Result | Standard |
|---|---|---|
| Reaction to Fire | Class A1 (Non-combustible) | EN 13501-1 |
| Fire Resistance | Maintains structural integrity under fire conditions | — |
| Corrosion Protection | Epoxy coating, galvanized, or stainless steel options available | — |
International Standards Compliance for Shear Bolt MBT Rebar Coupler
TARCO Industry manufactures and tests its shear bolt MBT rebar coupler products in accordance with the following international standards, ensuring global market compatibility and regulatory compliance.
Furthermore, you can verify these standards on the official websites of ASTM International, ISO, and Standards Australia.
USA / NORTH AMERICA ACI 318 — Building Code Requirements for Structural Concrete
Furthermore, ACI 318 represents the primary building code requirements for structural concrete in the United States.
Additionally, the code specifies two types of mechanical splices: Type 1 and Type 2.
Moreover, Type 1 splices require the coupler to develop at least 125% of the specified yield strength of the reinforcing bar in direct tension, while Type 2 splices require the coupler to develop the specified tensile strength of the bar.
Therefore, TARCO Industry tests its shear bolt MBT rebar coupler to both ACI 318 Type 1 and Type 2 requirements, ensuring compliance with US building codes.
Specifically, our couplers comply with ACI 318 Type 1 and Type 2 performance on ASTM A706 and ASTM A615 Grade 60 reinforcing bar.
Standard ASTM A1034 — Test Methods for Mechanical Splices of Steel Reinforcing Bars
Specifically, ASTM A1034 covers the test methods for mechanical splices of steel reinforcing bars.
Moreover, this standard provides procedures for testing tensile strength, slip, and cyclic loading performance of mechanical couplers.
Therefore, TARCO Industry uses ASTM A1034 test methods to verify the performance of its shear bolt MBT rebar coupler.
Standard TxDOT DMS-4510 — Mechanical Couplers (Texas Department of Transportation)
In addition, TxDOT DMS-4510 specifies requirements for Class A and Class B mechanical couplers.
Furthermore, Class A couplers must develop at least 125% of the specified yield strength of the reinforcing bar in direct tension, with slip not exceeding 0.25mm for #14 bars and smaller.
Additionally, Class B couplers must meet Class A requirements plus cyclic loading (100 cycles) and fatigue loading (10,000 cycles) requirements.
Consequently, TARCO Industry shear bolt MBT rebar coupler meets both Class A and Class B requirements per TxDOT DMS-4510.
INTERNATIONAL ISO 15835 — Steel for the Reinforcement of Concrete: Reinforced Couplers
Furthermore, ISO 15835 is the international standard that specifies requirements for mechanical couplers used to connect reinforcing steel bars.
Additionally, the standard defines two classes: Class S (for seismic applications) and Class R (for non-seismic applications).
Moreover, ISO 15835-1 Class S is the international standard for compliance of mechanical splices in seismic applications.
Therefore, TARCO Industry shear bolt MBT rebar coupler is tested to ISO 15835 requirements, providing performance data for both Class S and Class R applications.
Standard EN 1992-1-1 (Eurocode 2) — Design of Concrete Structures
Specifically, EN 1992-1-1 (Eurocode 2) Clause 8.7 covers laps and mechanical couplers for reinforcing bars.
Moreover, forces are transmitted from one bar to another by lapping of bars, welding, or mechanical devices assuring load transfer in tension-compression or in compression only.
Therefore, TARCO Industry shear bolt MBT rebar coupler is designed and manufactured in compliance with Eurocode 2 requirements for mechanical splices.
Standard BS 8110 — Structural Use of Concrete (UK)
In addition, BS 8110 Clause 3.12.8.16.2 states that the only acceptable form of full-strength butt joint for a bar in tension comprises a mechanical coupler satisfying specified slip and tensile strength criteria.
Furthermore, TARCO Industry shear bolt MBT rebar coupler satisfies the BS 8110 requirements for mechanical couplers, with full compliance documentation available.
CHINA JGJ 107-2016 — Technical Specification for Mechanical Splicing of Steel Reinforcing Bars
Furthermore, JGJ 107-2016 represents the primary Chinese national standard covering mechanical splicing of steel reinforcing bars.
Additionally, the specification applies to the design, construction, and acceptance of mechanical splices in reinforced concrete structures.
Moreover, it specifies three performance grades for mechanical splices: Grade I, Grade II, and Grade III, with Grade I requiring the coupler to develop at least 115% of the standard ultimate tensile strength of the connected rebar.
Therefore, TARCO Industry manufactures its shear bolt MBT rebar coupler in full compliance with JGJ 107-2016 Grade I requirements, with residual deformation tested in accordance with the specification.
Standard Sizes & Customization of Shear Bolt MBT Rebar Coupler
Furthermore, TARCO Industry offers a comprehensive range of standard sizes for shear bolt MBT rebar coupler products.
Additionally, we provide custom dimensions, materials, and coatings upon request. The standard size chart below shows the typical rebar diameter-coupler dimensions available.
| Rebar Size (US) | Rebar Size (Metric) | Rebar Size (Canada) | No. of Bolts | Bolt Thread | Socket Head | Nominal Bolt Shear Torque (Nm) | Tensile Strength |
|---|---|---|---|---|---|---|---|
| #4 | 12 mm | 10M | 6 | M10 | 1/2″ | 55 | 18,000 lbs (80 kN) |
| #5 | 16 mm | 15M | 6 | M12 | 1/2″ | 108 | 27,900 lbs (124 kN) |
| #6 | 20 mm | 20M | 8 | M12 | 1/2″ | 108 | 39,600 lbs (176 kN) |
| #7 | 22 mm | — | 10 | M12 | 1/2″ | 108 | 54,000 lbs (240 kN) |
| #8 | 25 mm | 25M | 10 | M16 | 5/8″ | 200 | 71,100 lbs (316 kN) |
| #9 | 29 mm | 30M | 10 | M16 | 5/8″ | 200 | 90,000 lbs (400 kN) |
| #10 | 32 mm | — | 10 | M16 | 5/8″ | 265 | 114,300 lbs (508 kN) |
| #11 | 36 mm | 35M | 12 | M20 | 3/4″ | 385 | 140,400 lbs (624 kN) |
| #14 | 43 mm | 45M | 16 | M20 | 3/4″ | 442 | 180,000 lbs (800 kN) |
| #18 | 57 mm | — | 24 | M20 | 3/4″ | 442 | 320,000 lbs (1,423 kN) |
Available Options for Shear Bolt MBT Rebar Coupler
Furthermore, we offer various options to meet different project requirements.
Specifically, the standard option provides a plain finish for general applications.
Additionally, epoxy coating is available for enhanced corrosion protection in harsh environments.
Moreover, hot-dip galvanized and stainless steel options are available for marine and highly corrosive applications.
Consequently, the coupler can be supplied in standard, transition (different bar sizes), weldable, and end anchor versions.
Finally, custom markings and traceability codes can be applied for quality assurance and project documentation.
Applications of Shear Bolt MBT Rebar Coupler
Furthermore, this product is widely used in high-rise buildings for column splicing, beam connections, and wall reinforcement.
Additionally, it is ideal for bridges and infrastructure projects, particularly for bridge decks, piers, and retaining walls.
Moreover, it serves precast concrete construction for connecting precast elements and achieving structural continuity.
Consequently, it is utilized in tunnels and underground structures where rebar congestion and lap splicing are impractical.
Therefore, it is applied in nuclear facilities and safety-related structures where stringent quality and performance requirements apply.
In addition, it is used in seismic zones for Type 2 mechanical splices requiring high ductility and cyclic loading resistance.
Finally, it is applied in repair and retrofit projects where existing rebar must be extended or connected without rotation.
Packaging & Delivery
Furthermore, our packaging utilizes wooden pallets or cartons with labels indicating rebar size, part number, and quantity.
Additionally, a 20GP container can hold approximately 10,000 – 15,000 pieces depending on size.
Moreover, the lead time is 7 – 15 days after deposit.
Consequently, the port of loading is Tianjin, Qingdao, or Shanghai, China.
Why Choose TARCO Industry as Your Shear Bolt MBT Rebar Coupler Supplier
Furthermore, TARCO Industry is a professional shear bolt MBT rebar coupler manufacturer with full production capabilities, which means no middlemen and competitive pricing.
Additionally, our products are certified to ACI 318, ISO 15835, EN 1992-1-1, BS 8110, JGJ 107-2016, and ASTM A1034 for global market access.
Moreover, we provide OEM/ODM services for rebar size, material, coating, and packaging.
Consequently, our production is ISO 9001-certified with batch testing and third-party inspection support.
Therefore, we serve customers in North America, Europe, Australia, New Zealand, Southeast Asia, the Middle East, and Oceania.
Finally, we offer short lead times and efficient logistics from major Chinese ports.
Frequently Asked Questions (FAQ)
What is a shear bolt MBT rebar coupler and where is it used?
Furthermore, a shear bolt MBT rebar coupler is a mechanical splicing system used to connect reinforcing steel bars end-to-end without threading or bar rotation. Therefore, it is commonly used in high-rise buildings, bridges, precast concrete, and seismic zone projects.
How does the lockshear bolt system work?
Moreover, the coupler uses lockshear bolts that are tightened to embed into the rebar surface. Consequently, the bolt heads shear off at a predetermined torque, providing instant visual verification of correct installation.
Does the shear bolt MBT rebar coupler meet ACI 318 requirements?
Yes. The coupler is tested to ACI 318 Type 1 and Type 2 performance requirements. Therefore, it develops at least 125% of the specified yield strength of the reinforcing bar in direct tension.
Do your products comply with international standards?
Additionally, TARCO Industry shear bolt MBT rebar coupler complies with ACI 318, ISO 15835, EN 1992-1-1, BS 8110, JGJ 107-2016, and ASTM A1034 for global market access.
Can the coupler be used in seismic zones?
Furthermore, the coupler meets ACI 318 Type 2 and ISO 15835 Class S requirements for seismic applications. Additionally, it is fatigue-resistant and suitable for high-performance in seismic zones.
Can you provide samples before bulk order?
In addition, TARCO Industry offers free samples of shear bolt MBT rebar coupler for quality evaluation. Please contact our sales team for sample arrangements.
