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Ultra-Tensile Burst Expansion Anchor

A Burst Expansion Anchor is a tail-expanding, ultra-high tensile strength mechanical anchor. It operates by retracting an internal cone, which forcibly expands the slotted tail segments of a metal sleeve at the bottom of the concrete hole. This creates a "mechanical undercut" lock (simulating an undercut anchor), achieving pull-out resistance far exceeding that of standard expansion anchors (typically 2-3 times higher). Its core value lies in deep embedment (>8 times the bolt diameter), making it suitable for extreme heavy loads, vibration resistance, and impact resistance scenarios.
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Product Overview


The Burst Expansion Anchor is a tail-expanding, ultra-high tensile strength mechanical anchor engineered to address extreme heavy-load, vibration, and impact challenges in critical engineering. Its core mechanism relies on retracting an internal tapered cone plug, which forces the slotted tail of a high-strength expansion sleeve to expand radially within pre-drilled concrete holes. This process creates a mechanical undercut lock—a structure that mimics undercut anchors and delivers pull-out resistance 2–3 times higher than standard expansion anchors. With a mandatory deep embedment (over 8 times the bolt diameter), it ensures stability in scenarios like super-heavy lifting, seismic activity, and harsh environments, serving as a safety cornerstone for infrastructure and industrial projects.


Ultra-Tensile Burst Expansion Anchor



Product Advantages


High Tensile Strength & Pull-Out Performance

The deep mechanical undercut design allows the anchor’s tail segments to form a "mechanical hook," generating exceptional holding power. For example, an M16 Burst Expansion Anchor in C30 concrete achieves an ultimate tension of over 70kN—making it ideal for super-heavy systems like 10,000-ton capacity gantry crane rails or nuclear power equipment supports. This strength eliminates risks of anchor failure under extreme static loads.


Superior Vibration Resistance & Anti-Loosening

Equipped with a dual anti-loosening mechanism: the mechanical undercut lock resists structural vibration, while the integrated spring washer absorbs high-frequency micro-vibrations. It has passed the ISO 16130 vibration test, showing zero loosening after 2,000 cycles at ±2mm amplitude—critical for dynamic environments like high-speed rail seismic bearings or ship deck machinery.


Exceptional Impact Load Capacity

The undercut structure disperses stress evenly, tolerating instantaneous shock loads up to 15g acceleration (equivalent to twice the force of an automotive collision). This makes it suitable for high-impact scenarios such as mining crusher bases or military weapon test platforms, where sudden force could compromise standard anchors.


Removable Design & Smart Monitoring Potential

Unlike permanent anchors, it features a removable design: reverse tightening releases the cone plug, enabling non-destructive removal and cutting maintenance costs by 50%. Optional fiber-optic sensor anchors also support real-time preload loss monitoring, integrating with IoT systems for proactive engineering management.



Detail Data


The Burst Expansion Anchor offers precise dimensional specifications across models (M6 to M20) to match diverse project needs:


For M6 series (e.g., 6*60): screw length = 60mm, effective burial depth = 43mm, installation hole diameter = 8mm, drilling depth = 50mm, installation torque = 4Nm, design tension = 0.99kN, ultimate tension = 5kN.

For larger M20 models (e.g., 20*200): screw length = 200mm, effective burial depth = 150mm, installation hole diameter = 23mm, drilling depth = 164mm, installation torque = 110Nm, design tension = 35kN, ultimate tension = 100kN.


All models require substrates with ≥C30 concrete strength (compressive strength >30MPa) and thorough dust removal (via compressed air + brush) during installation to ensure optimal performance.


Burst Expansion Anchor
Model Screw Length (mm) Effective Burial Depth (mm) Installation Hole Diameter (mm) Drilling Depth (mm) Installation Torque (mm) Design Tension (kN) Ultimate Tension (kN)
6*60 60 43 8 50 4 0.99 5
6*80 80 63 8 70 4 0.99 5
6*100 100 83 8 90 4 0.99 5
6*120 120 103 8 110 4 0.99 5
6*150 150 130 8 135 4 0.99 5
8*60 60 36 10 44 8 2.3 9
8*70 70 46 10 54 8 2.3 9.5
8*80 80 56 10 64 8 2.3 9.5
8*100 100 76 10 84 8 2.3 9.8
8*120 120 96 10 104 8 2.3 9.9
8*150 150 126 10 134 8 2.3 9.8
8*200 200 176 10 184 8 2.3 9.9
10*60 60 32 12 42 25 7 25
10*70 70 42 12 52 25 7 25
10*80 80 51 12 61 25 7 28
10*90 90 61 12 71 25 7 28
10*100 100 71 12 81 25 7 28
10*110 110 81 12 91 25 7 28
10*120 120 91 12 101 25 7 28
10*150 150 120 12 131 25 7 28
10*200 200 170 12 181 25 7 28
12*70 70 36 14 48 40 15 35
12*80 80 46 14 58 40 15 35
12*90 90 56 14 68 40 15 38
12*100 100 66 14 78 40 15 38
12*110 110 76 14 88 40 15 38
12*120 120 86 14 98 40 15 38
12*150 150 116 14 128 40 15 38
14*100 100 65 16 77 50 18 45
14*120 120 85 16 97 50 18 45
14*150 150 115 16 127 50 18 45
14*200 200 165 16 177 50 18 45
16*100 100 50 18 71 60 25 60
16*120 120 78 18 91 60 25 60
16*150 150 108 18 121 60 25 60
16*180 180 138 18 151 60 25 60
16*200 200 160 18 173 60 25 60
18*150 150 110 20 124 80 29 80
18*180 180 140 20 154 80 29 80
18*200 200 160 20 174 80 29 80
20*150 150 98 23 112 110 35 100
20*180 180 130 23 144 110 35 100
20*200 200 150 23 164 110 35 100
20*250 250 200 23 214 110 35 100





Applications


Heavy-Duty Industrial Suspension

Ideal for large industrial crane rails (shipyard gantry cranes, nuclear plant bridge cranes), high-rise building façade maintenance tracks, and wind turbine tower bases. A single M36 bolt withstands ≥450kN pull-out force, resisting wind/wave overturning moments per IEC 61400-6 and DNVGL standards.


Extreme Environment Anchoring

Cryogenic conditions (e.g., LNG tank anchoring): Uses AISI 316L stainless steel (>100J impact toughness at -196°C).

High salt-spray environments (e.g., cross-sea bridge cable towers): 316 stainless steel + hot-dip galvanizing (salt-spray resistance >5,000 hours).

Nuclear radiation zones: Special alloys (ASTM A276 Type 304N) resist γ-ray embrittlement.


Prohibited Applications

Not suitable for lightweight masonry blocks (crushing risk), concrete with cracks >0.3mm (lock failure), ultra-high-frequency vibration (>50Hz, >5mm amplitude), or strong acid environments (pH <2, causing intergranular corrosion).



Why Choose Us


We provide end-to-end support, including:

Pre-sales technical inquiry (model selection based on load, substrate, and environment).

On-site installation guidance to ensure compliance with depth/torque requirements.

Quality certification documents (e.g., compliance with ACI 318-14, EN 1991-2).

Customized models (e.g., short-bolt designs for shallow holes) for bulk orders.

Our team responds to inquiries within 24 hours and offers a 12-month warranty for manufacturing defects.


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