[NETIS Registered Product] Supports large expansion (200-600mm) and wide spacing (up to 1230mm). Contributes to the longevity of bridges and reduces lifecycle costs.
The Hybrid Joint 3LIIA type has a vertical integrated structure for the load support and anchor plate sections, making it highly durable and preventing damage from metal fatigue. A fatigue loading test conducted using actual products by a third-party organization confirmed a service life of 100 years, demonstrating durability for 100 years. This 100-year durability aligns with the design service life of bridges. Unlike conventional products that require replacement of expansion devices 3 to 4 times, this product can be used without any replacements, significantly reducing lifecycle costs. By using steel plates vertically, the exposed parts are minimized, resulting in very low impact during operation, and making it less likely to generate noise and vibration. It is a product capable of accommodating large expansion and wide spans, and it is one of the largest products in the category of rubber-based joints (a general term for products other than finger joints and embedded joints). The main differences from the NEXCO specification 3LII type are that the secondary waterproofing material is not standard equipment (but can be installed separately) and that the painting specifications differ. The durability and the waterproof structure of the main body are equivalent to the NEXCO specifications.
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basic information
【Features】 ○ Supports a large expansion range (200–600mm) and wide spacing (up to 1230mm) ○ Compatible with all types of bridges ○ Ultra-low noise and comfortable driving ○ Ultra-long durability of 100 years and maintenance-free ○ High water-tightness for 50 years due to the fastening structure ○ Safe and easy installation (product height is low and relatively lightweight) ○ Replaceable ○ Economical ● For more details, please contact us or request a catalog.
Price range
Delivery Time
※Around 90 days (the delivery time may vary depending on the quantity, so please contact us for details).
Applications/Examples of results
The Ministry of Land, Infrastructure, Transport and Tourism, NEXCO, urban expressways, and local governments, among other public organizations, have adopted this product nationwide. This product has passed the water stop test and durability test conducted by NEXCO.
Line up（8）
| Model number | overview |
|---|---|
| 3LIIA-200 | Expansion amount 200mm (±100mm) |
| 3LIIA-250 | Expansion amount 250mm (±125mm) |
| 3LIIA-300 | Expansion amount 300mm (±150mm) |
| 3LIIA-350 | Expansion amount 350mm (±175mm) |
| 3LIIA-400 | Expansion amount 400mm (±200mm) |
| 3LIIA-450 | Expansion and contraction amount 450mm (±225mm) |
| 3LIIA-500 | Expansion amount 500mm (±250mm) |
| 3LIIA-600 | Expansion amount 600mm (±300mm) |
catalog（5）
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News about this product（1）
Company information
CRETEC, a company under Crittec Industries, was born from the combination of Create (creation) and Technology. As a comprehensive manufacturer of bridge expansion devices, we continue to develop expansion devices that contribute to the longevity of bridges and environmental protection. Moreover, we do not stop at product manufacturing; by consistently handling everything from research, design, manufacturing, sales, to construction in-house, we can manufacture and install expansion devices that meet the requests of our clients and general contractors, as well as the conditions and environments of the bridges and roads on-site. We also take into account the issues that arise during the installation of expansion devices and the damage conditions of existing devices that are removed, using this information to improve and develop our products. Please feel free to contact us for inquiries about bridge expansion devices, requests for materials, or estimates. ◆ What is a bridge expansion device? It is a component installed in the gap between the bridge abutment and the bridge girder, or between bridge girders. When designing a bridge, it is necessary to create a gap to prevent the bridge girders from colliding due to expansion and contraction caused by temperature changes. The bridge expansion device is required to cover this gap and ensure safe passage for vehicles and pedestrians.
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