Seismic Isolation SF Sliding Finger Joints for Bridge and Highway

Product Description

Lisa Kang
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Seismic Isolation SF Sliding Finger Joints for Bridge and Highway


Description:
Finger type bridge expansion joint contains steel edge profiles, featuring connection surfaces for deck waterproofing membranes, which are connected to the bridge deck by anchor loops. Finger Joints are cantilevered or simply supported steel tooth expansion joints. They are composed of pairs of independent elements with parallel teeth provided in lengths from 3 feet to full roadway widths.   Finger Joints are used to provide support to vehicles as they travel across bridge expansion joint openings. They create an effective seal at the joint opening, preventing water and deleterious materials from contacting the steel support girders and bearings below.

Features:
1. Waterproof, dustproof, shockproof, used in all kinds of bridge structures, large expansion amount.
2. A smooth transition for vehicular traffic resulting in low noise
3. Ease of maintenance with a small crew and minimal lane closure time
4. Can be supplied with integral self-cleaning closed cell foam seals or a durable neoprene trough to channel water away from the structure
5. Be replaced without the need for excavation of the anchorage system
6. Can be supplied in three foot lengths to permit ease of installation without the need for heavy lifting equipment
7. Can be fabricated to meet bridge deck skews
8. Lasts the life of the bridge deck under normal circumstances
9. Can be supplied with post tensioned anchors into concrete headers, cast into concrete blockouts, or bolted to existing steel members 

Applications
Sliding finger type bridge expansion joints are suitable for use under heavy traffic, and mainly applied to the device with *****0mm expansion. Their special doweled connection system makes them particularly useful where the impact on the main structure should be minimised. The system is designed on a modular basis, allowing individual finger plates to be quickly replaced as required. Finger type joints are still specified on many bridge projects due to proven long-term structural performance. These joint systems are also convenient to install on bridge rehabilitation projects requiring a shallow joint depth and/or staged construction.