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Benkelman Beam for Pavement Quality Testing
The Benkelman Beam is a reliable and widely-used lever-arm device designed to measure the deflection of flexible pavements under the action of moving wheel loads. This essential tool helps engineers assess pavement quality and structural integrity, making it an indispensable instrument for road construction and maintenance projects.
How It Works
The device consists of a probe beam supported by a rigid reference beam. The 2.44m (8ft) probe end measures deflections using a dial indicator positioned at the end of the fulcrum. To obtain the total pavement deflection, the readings on the dial indicator are doubled. During testing, the probe beam is placed between the tires of a test vehicle, and deflection is measured as the vehicle moves over the test area. This method provides accurate and reliable data on the pavement's structural response under load.
Key Features
- Leveling Adjustment: The reference beam includes a leveling adjustment to easily zero the dial indicator before measurements, ensuring accurate and consistent results.
- Vibrator Alert System: A switchable, battery-operated vibrator alerts the operator and assures the free movement of beam parts during measurements, reducing the risk of errors.
- Lightweight and Portable: The three-piece, anodized aluminum beam weighs just 33lb (15kg) net, making it easy to transport and set up on-site. The longest individual piece measures 6.5ft (1.99m), facilitating easy handling and storage.
- Durable Construction: The anodized aluminum construction ensures long-lasting durability and resistance to corrosion, even in harsh outdoor environments.
Technical Specifications
- Product Dimensions: 60x10x14in (1,524x254x355.6mm), WxDxH
- Estimated Shipping Weight: 85.0lb (38.56kg)
- Probe Length: 2.44m (8ft)
- Net Weight: 33lb (15kg)
- Longest Piece: 6.5ft (1.99m)
Standards Compliance
The Benkelman Beam meets the following industry standards:
- AASHTO T 256
- ASTM D4695
Additional Information
Dial Indicators must be ordered separately. Please consult our product catalog or contact our sales team for compatible dial indicator options.
The Benkelman Beam is ideal for use in a wide range of pavement evaluation projects, from routine road maintenance to large-scale infrastructure assessments. Its ease of use, portability, and compliance with industry standards make it a trusted choice for engineers and technicians worldwide.
