Benkelman Beam Apparatus

About Benkelman Beam Apparatus

Benkelman Beam Apparatus is a precision field testing equipment used to measure the rebound deflection of flexible pavements under moving wheel loads. It is widely used in highway engineering, road construction projects, and quality control laboratories to evaluate the structural capacity and performance of road surfaces.

The apparatus operates on a simple lever arm principle, where small pavement deflections are magnified and recorded using a dial gauge for accurate readings. It is placed between the wheels of a loaded vehicle, and the deflection is measured as the vehicle passes over the test point.

Key Features:

• Lightweight aluminum construction for easy field use
• Telescopic design for convenient transport and storage
• High accuracy dial gauge (analog/digital options available)
• Simple lever mechanism for magnified readings
• Quick setup and easy operation
• Supplied with carrying case and accessories
• Suitable for on-site pavement evaluation

Technical Specifications:

• Beam Length: Approx. 2.5 m
• Fulcrum Ratio: 2:1 or 4:1
• Dial Gauge: 0.01 mm 25 mm (typical)
• Material: Aluminum alloy
• Weight: Approx. 1516 kg
• Measurement Type: Pavement deflection under load
• Operation: Manual (field use)