OSRO STRAP MANUFACTURER

China Osro Strap Manufacturer for Deep Mining & Tunnel Surface Support

Factory-direct Osro strap and tendon strap solutions engineered for extreme geological conditions. Providing high-strength reinforcement to ensure worker safety in underground environments.

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Deep Mining Support

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Rockbolt Surface Support

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High Deformation Areas

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Secondary Support System

Simplify your ground reinforcement with our integrated strap technology.

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What Is an Osro Strap / Tendon Strap?

The Osro Strap, also known as a Tendon Strap, is a heavy-duty strip-type surface support element manufactured from high-yield rebar mesh. Unlike standard wire mesh, these straps are specifically designed to link multiple rock bolts together, creating a unified reinforcement "skeleton" across the rock face. They are critical for managing stress distribution in high-pressure underground environments where ground movement is a significant risk.

Our straps are fabricated using premium steel to ensure consistent weld strength and structural ductility, meeting stringent international mining safety standards.

Strip-Type Surface Support

Designed for focused reinforcement along drift lines and specific failure zones where mesh coverage alone is insufficient.

Rock Bolt Connection

Features optimized apertures to accommodate various rock bolt types, ensuring a flush fit and secure mechanical bond.

Deep Mine Reliability

Engineered for high-stress deep mining roadway support where dynamic loading and rock bursts are primary concerns.

Get technical specifications and factory pricing for your project requirements.

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Rock Falls Between Bolts, High Deformation & Rockburst Risk

In deep hard rock mines and high-stress civil tunneling, discrete rock bolts alone are often insufficient. Without continuous surface reinforcement, the fractured rock mass between the bolt heads remains vulnerable to unraveling, dynamic ejection, and structural collapse. Our engineering solutions address these critical failure modes through integrated mesh and strap systems.

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Rock Falls Between Bolts

Small to medium-sized blocks can detach from the face between bolt patterns, posing a lethal risk to personnel and damaging equipment.

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Insufficient Surface Support Capacity

Standard mesh may fail under the localized weight of broken ground without the structural rigidity provided by heavy-duty Osro straps.

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High Deformation in Deep Roadways

Extreme depth creates squeezing ground conditions that require support systems capable of yielding without catastrophic snapping.

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Rockburst and Dynamic Loading Risk

Sudden energy releases in high-stress environments necessitate high energy-absorption capacity to contain ejected rock material.

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Local Bolt Overload

Inefficient load distribution can lead to individual bolt failure. Straps redistribute the pressure across multiple anchor points.

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Irregular Ground Surface

Complex geological profiles make standard rigid support difficult. Flexible straps conform to the rock face for optimal contact.

These Problems Need Continuous, Flexible Surface Support

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Osro Strap Solutions for Underground Surface Support

We provide a comprehensive range of Osro strap and tendon strap solutions, engineered from high-tensile steel to provide maximum containment and structural integrity in the most demanding underground conditions.

Standard Osro Strap

High-tensile steel multi-wire strap designed for general surface support and mesh reinforcement in stable rock masses.

High Tensile Cost-Effective Versatile

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Galvanized Osro Strap

Hot-dip galvanized for superior corrosion resistance in wet or chemically aggressive underground environments.

Anti-Corrosive Long-Life Zinc Coated

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Heavy-Duty Osro Strap

Increased wire diameter and weld strength for areas subject to high static loads or potential seismic activity.

Max Strength Seismic Rated Thick Gauge

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Hammock Type Osro Strap

Specially shaped profile to provide superior containment for loose rock and better face conformity in irregular drives.

Containment Profiled Enhanced Safety

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Rhino Strap

Our ultimate surface support solution, offering industry-leading load capacity for the most dangerous rockburst zones.

Elite Tier Dynamic Loading Ultra-Tough

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Custom Tendon Strap System

Bespoke configurations including integrated plates and custom lengths to suit specific mine-site engineering specifications.

Customized Engineered Systemic

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Structure & Technical Parameters: Rebar Layout, Strap Width, Length & Welding Details

Precision-engineered for structural integrity, the Osro Strap utilizes high-grade rebar configurations to ensure maximum load distribution and installation efficiency in underground mining environments.

Parameter	Specification
Standard Length	2400mm - 5400mm (Customizable)
Standard Width	300mm / 450mm
Longitudinal Rebars	5 - 8 Nos (8mm / 10mm Grade 500E)
Transverse Bars	6mm / 8mm @ 150mm spacing
Welding Type	Resistance Spot Welding (High Strength)
Corrosion Protection	Black / Hot-Dip Galvanized

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Strap Width

Uniform coverage across spans.

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Rebar Grade

High-tensile 500E steel.

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Cross Spacing

Optimized for mesh bonding.

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Weld Integrity

Failure-resistant joints.

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End Finish

Burr-free reinforced ends.

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Installation

Compatible with rock bolts.

Get full technical specifications and engineering drawings.

Download Technical Specs

Working Principle: Continuous Surface Support, Sliding Stress Distribution & Load Transfer

The Osro Strap system operates on advanced mechanical principles that mitigate rock burst risks and maximize support capacity across unstable geological formations.

Surface Protection

Bridges the gap between individual rock bolts, preventing localized rock falls and securing fragmented face material.

Stress Distribution

Sliding longitudinal bars allow for controlled deformation, distributing kinetic energy across the entire strap length.

Load Transfer

Efficiently transfers dynamic loads to multiple primary rock bolts, reducing the strain on any single support element.

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Bolt Gaps Covered

The strap spans the space between bolts, providing immediate surface restraint.

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Rock Bolts Clamp

Bolts are tightened over the strap, creating a high-friction mechanical bond.

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Stress Distributed

Seismic or geological stress is channeled through the longitudinal rebars.

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Load Transfers

Support energy is shared among the bolt array, preventing failure.

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Surface Support System: How Osro Strap Works with Rock Bolts, Mesh & Shotcrete

Optimizing load transfer across the excavation surface through integrated structural synergy and high-tensile flexibility.

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Rock Bolts

The primary anchors providing deep reinforcement into the rock mass, serving as the suspension points for the strap.

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Osro Strap

High-tensile longitudinal support that distributes point loads between bolts and bridges surface instabilities.

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Welded Mesh

Provides immediate containment of small loose rocks between primary support elements, held firm by the strap.

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Shotcrete

Sprayed concrete layer that seals the rock face, preventing weathering and providing additional flexural strength.

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TSL

Thin Spray-on Liners used for rapid skin reinforcement and as a supplemental membrane in specific geological zones.

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Mechanical Performance & Testing: Real Load Capacity, Eccentric Loading & Dynamic Adaptability

Validating structural integrity through rigorous laboratory simulations and real-world underground performance data.

Real Underground Loading

Unlike laboratory tests that apply pure axial tension, underground rock bolts and straps often face eccentric loading. This occurs when rock fragments shift unevenly, applying torque and shear.

Osro Strap is engineered to adapt to these non-linear forces, maintaining its structural capacity even when the load isn't perfectly centered, ensuring continuous protection during seismic events or rock shifts.

Lab Capacity

170kN

Peak tensile strength achieved in controlled vertical pull tests using Grade 500 steel.

Operational Load

44kN

Verified real-world capacity under complex eccentric loading conditions common in deep mining.

Ductility

>15%

High elongation properties allow the system to absorb energy during dynamic rock bursts.

Compliance

AS/NZS

Fully compliant with international standards for underground support and mining safety.

Require detailed test reports or FEA analysis?

Ask for Performance Support analytics

Upgraded Models: Hammock Type Osro Strap & Rhino Strap

Engineered for extreme geomechanical conditions, the Hammock and Rhino variations represent the pinnacle of underground roof support, offering double the load capacity of traditional systems.

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Hammock Type Osro Strap

Features narrowed ends designed to optimize stress distribution at the bolt locations, significantly reducing the risk of plate tear-out under dynamic loads.

check_circle 2x Load Capacity: Verified through tensile bench testing.
check_circle Stress Concentration: Mitigated via variable width geometry.

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Rhino Strap

The ultimate heavy-duty solution, incorporating flat steel cross-bars welded across the longitudinal rebar for unparalleled structural integrity.

check_circle Ultra-Rigid Frame: Prevents longitudinal twisting.
check_circle Enhanced Grip: Improved interaction with shotcrete and rock mass.

SPECIFICATION	TRADITIONAL	HAMMOCK TYPE	RHINO STRAP
Tensile Strength (kN)	180 - 220	360 - 440	450+
Steel Grade	Grade 500	Grade 500 Enhanced	Grade 500 + Flat Bar
Application	Standard Support	High-Stress Zones	Extreme Deformation

Get technical recommendations for your specific geomechanical conditions.

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Standard Installation Process: Placement, Bolt Installation, Pre-Tensioning & Extension

Follow our verified 6-step field protocol for safe, efficient, and maximum-strength installation of Osro Straps in challenging underground environments.

STEP 01

Primary Support

Ensure face stability and primary mesh or initial bolting is complete before strap positioning.

STEP 02

Placement

Align the OSRO strap against the roof/wall profile, ensuring longitudinal rebar faces the rock.

STEP 03

Bolt Insertion

Insert the rock bolt through the rebar gap, ensuring centered placement for optimal load transfer.

STEP 04

Washer Clamping

Apply the spherical washer and dome plate over the strap wires, securing the structural connection.

STEP 05

Pre-Tensioning

Torque the bolt to engineering specifications to achieve immediate active support tension.

STEP 06

Overlapping

Extend support by overlapping the next strap by at least 300mm to maintain continuous reinforcement.

Need a custom installation procedure for your site?

Our engineering team provides on-site training and customized support plans.

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Application Scenarios: Deep Hard Rock Mines, Rockburst Zones & Broken Ground

Engineered for the most extreme geological environments. Osro Strap provides critical confinement and face support where traditional systems fail, ensuring operative safety in active mining zones.

Deep Hard Rock Roadway

High-stress management in primary development drifts exceeding 1000m depth.

High-Stress Confinement Depth+1000m

High Deformation Tunnel

Dynamic support for squeezing ground conditions and yielding rock masses.

Yielding Squeezing Ground Dynamic

Rockburst Impact Zone

Energy-absorbing reinforcement designed to mitigate sudden kinetic energy release.

Energy Absorb Burst Control Safety Critical

Fault Fracture Zone

Structural bridging across unstable fault lines and fragmented geological strata.

Fragmentation Fault Bridge Stability

Main Haulage Drift

Long-term maintenance-free support for critical arterial mining infrastructure.

Long-Life Arterial Low Maint

Composite Shotcrete Support

Enhanced tensile reinforcement when integrated with shotcrete and mesh systems.

Composite Tensile Reinforce Hybrid

Need a tailored support solution for your specific site conditions?

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Core Advantages: Flexible Support, Easy Installation, Cost Saving & Long-Term Durability

OSRO STRAP technology redefines mining efficiency by combining structural rigidity with the adaptability required for unpredictable underground environments.

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Easy Installation

Lightweight components designed for rapid manual handling or mechanized bolting without specialized tools.

Rapid Deploy Low Weight Manual Handling

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Flexible Fit

Profiles that contour precisely to uneven rock faces, maximizing surface area contact and load transfer.

Contouring Precision Fit Rock Contact

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Cost Saving

Reduces logistics costs and installation time, offering a lower total cost of ownership over the mine life.

OPEX Reduction Efficiency High ROI

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Complex Ground

Maintains structural integrity across varying lithologies and highly fractured ground conditions.

Lithology Fracture Zones Universal

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Stress Distribution

Evenly distributes point loads across multiple anchors, preventing localized rock mass failure.

Load Sharing Point Control Unified Support

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Long-Term Durability

Corrosion-resistant materials ensure performance throughout the entire life-of-mine cycle.

Corrosion Resist Life-Of-Mine Reliable

Ready to optimize your ground control strategy?

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How to Select the Right Osro Strap for Your Mine Support Project

Engineering-driven selection process to ensure maximum structural stability and safety in underground excavations. Follow our systematic approach to match geology with the right support product.

STEP 01

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Check Ground

Analyze rock mass rating (RMR) and geological discontinuities.

STEP 02

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Confirm Deformation

Measure anticipated convergence and squeezing ground pressure.

STEP 03

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Verify Span

Determine the roadway width and height for strap length calculation.

STEP 04

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Bolt Spacing

Align strap hole patterns with your current rock bolt grid.

STEP 05

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Load Capacity

Select yield strength required to resist surface rock fall.

STEP 06

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Surface Area

Choose between W-Strap or Flat Strap based on mesh interaction.

STEP 07

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Environment

Assess corrosive elements for Galvanized vs Black steel finish.

STEP 08

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Safety Factor

Apply 1.5x - 2.0x safety margins for high-risk zones.

Heavy Duty

W-Beam Osro 300

Best for high-stress deep mining zones with >20mm rock movement.

Medium Support

Rhino-Flex Series

Ideal for standard development roadways in stable rock conditions.

Lightweight

Osro-Lite 2.5

Cost-effective for secondary support and mesh pinning in temporary tunnels.

Corrosion Shield

Galv-Master HDG

Specified for ventilation shafts and high-humidity environments.

High Ductility

Dynamic Osro-D

Engineered for rock-burst prone areas requiring energy absorption.

Custom Span

V-Rib Articulated

Best for irregular tunnel profiles and complex intersection corners.

Need expert advice on strap selection?

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Custom Manufacturing & Quality Support from China Factory

Direct industrial fabrication tailored to your mining specifications. We combine high-volume output with rigorous QA/QC protocols to deliver reliable structural components globally.

Factory Manufacturing Support

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Advanced Cold Rolling

High-precision profile shaping for maximum section modulus.
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Custom Punching

Variable hole centers to match any rock bolt pattern (±1mm tolerance).
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Precision Cutting

Automated length cutting from 500mm to 6000mm.
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Steel Grade Selection

Options from Q235B up to high-strength Q345E alloys.

Quality Control Before Shipment

Material Batch Testing

Verification of yield and tensile strength at mill.

Dimensional Verification

Digital calipers check thickness and hole diameter.

Coating Thickness Check

Magnetic gauges for HDG and powder coat microns.

Load Capacity Verification

Hydraulic press testing on random sample batch.

Traceability Tagging

Unique serial numbers applied for site QA tracking.

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Custom Widths

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Embossed Patterns

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Special Coatings

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Triangular Hole Flanging

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Logo Stamping

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Bundled Packaging

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Site-Ready Pallets

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Full Lab Reports

Need bespoke manufacturing for your engineering specs?

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Get Custom Osro Strap Solutions Directly from China Factory

Connect with our engineering team for project-specific Osro strap specifications, direct factory pricing, and global logistics support.

ENGINEERING ADVANTAGES

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Global Safety Standards

Certified products that exceed international underground support requirements.
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Efficient Logistics

Optimized container loading and global tracking for critical project timelines.
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24/7 Technical Support

Our engineers are available for installation guidance and spec verification.
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China Factory Direct

Eliminate middleman costs with direct-from-source pricing and strict quality control.

Request Direct Factory Quotation

Connect directly with our engineering team to get custom-designed solutions that minimize downtime and cut procurement costs.

China-based Osro strap manufacturer supporting global underground mining & tunneling projects.

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