Yukings semi-enclosed noise barriers (also called semi-covered or U-shaped noise walls) extend the conventional vertical barrier with a cantilevered cover plate over the source side, creating a 3-sided enclosure that dramatically reduces direct sound radiation and diffraction over the top. Ideal for high-speed railways, urban ring roads, industrial plant boundaries and noise-sensitive residential districts.
The semi-enclosed or U-shaped noise barrier geometry wraps the noise source on 3 sides — two vertical absorptive walls plus a cantilevered cover plate extending over the source. This dramatically reduces direct sound radiation and diffraction over the barrier top, delivering +8-15 dB of additional effective attenuation compared to an equivalent-height vertical flat-top wall, at a fraction of the cost of a fully-enclosed acoustic tunnel.
Yukings semi-enclosed noise barriers combine standard vertical absorptive hybrid panels with a cantilevered steel cover plate extending over the noise source side. The cover plate is fabricated from hot-dip galvanized steel with an absorptive underside treatment and is supported by reinforced H-post columns. The resulting U-shaped geometry creates an extended acoustic shadow zone on the receiver side without the full structural cost of a 4-sided tunnel enclosure.
Detailed engineering specification for Yukings flat-top noise barriers. All parameters align with EN 1793 / EN 1794 / EN 1991-1-4 testing and design standards.
U-shaped 3-sided enclosure with cantilevered hot-dip galvanized steel cover plate.
| Property | Value |
|---|---|
| Insertion Loss DL (EN 1793-3) | 30 – 45 dB |
| Sound Insulation Rw (EN ISO 717-1) | 40 – 55 dB |
| Enclosure Type | 3-sided U-shape (2 walls + cantilevered cover plate) |
| Panel Width | 2,500 mm standard |
| Panel Height | 500 mm modules |
| Panel Depth | 120 / 140 / 160 / 200 mm absorptive hybrid |
| Top Cover Plate | hot-dip galvanized steel plate + absorptive underside |
| Cover Projection | 1.0 m – 3.5 m adjustable |
| H-post Column Size | H 150 x 150 x 8 x 10 to H 200 x 200 x 9 x 14 |
| Barrier Height (including cover) | 4.0 – 8.0 m |
| Foundation Type | reinforced concrete strip or individual pre-cast blocks |
| Transparent Window | 8 / 10 / 12 mm polycarbonate compatible |
| Finish | hot-dip galvanized + optional RAL powder coat |
| Corrosion Resistance | ISO 12944 C3-M / C4-H |
| Fire Rating | Class A (EN 13501-1) |
| Wind Load Rating | 1.5 kN/m2 |
| Design Service Life | 25 years |
| Structural Warranty | 15 years |
A U-shaped 3-sided geometry with an engineered cantilevered cover plate delivers the highest effective insertion loss per meter of barrier height, at a fraction of the cost of a fully-enclosed tunnel enclosure.
Two vertical absorptive hybrid walls plus an engineered cantilevered cover plate create a 3-sided enclosure around the noise source.
+8-15 dB of additional effective attenuation compared to an equivalent-height vertical flat-top wall, with EN 1793 test reports for tender dossiers.
Cantilevered cover plate projects 1.0 m to 3.5 m over the noise source side, tuned to your specific barrier height and receiver distance.
H 150x150x8x10 to H 200x200x9x14 hot-dip galvanized steel columns engineered to support the cantilevered cover plate under wind load.
120/140/160/200 mm depth hybrid absorptive + reflective panels with hydrophobic rock-wool infill for consistent broadband absorption.
25-year service life design with a 15-year structural warranty on Yukings-manufactured panels, cover plates and H-post columns.
Engineered for high-speed railway aerodynamic loading, industrial plant perimeter walls and urban transit viaduct applications.
Complete project engineering package including wind load calculations, foundation design and full CE / EN 1793 / EN 1794 test documentation.
Compare semi-enclosed barriers with Yukings flat-top, fully-enclosed and angled folded-top profiles, or explore our dedicated application-specific noise wall product lines.
Classic straight-profile modular panels for cost-effective highway and railway noise control where diffraction-over-top attenuation is acceptable.
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L-shaped and Y-shaped cantilever cap barriers for maximum insertion loss per meter of barrier height at urban and railway projects.
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4-sided acoustic tunnels and full-cover sound hoods for the most noise-sensitive high-speed railway and urban transit corridor projects.
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Metal-louvered absorption panels with optional polycarbonate or concrete sections for expressway, ring road and bridge parapet noise control.
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Rigid modular panels designed for high-speed rail aerodynamic load and railway-specific vibration, fatigue and slip-stream requirements.
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Absorptive metal-faced panels with Class A fire rating for power plants, factories, warehouses, compressor stations and industrial perimeter walls.
View Product →Commonly asked technical, commercial and logistics questions about Yukings semi-enclosed U-shaped noise barriers.
Our semi-enclosed noise barrier specialists will respond to your project inquiry within 24 hours, including technical guidance, cover-plate projection recommendations and project pricing where applicable.
Share your project parameters and a Yukings engineer will prepare a tailored proposal, including panel dimensions, H-post spacing, barrier height and estimated attenuation performance.
