Full PDF version

Machine Lumber Grading

Metriguard has been in the business of producing machine lumber grading equipment since 1973. We offer two different machine grading systems using 2 different technologies – the Model 7200 HCLT and the Model 2350 Sonic Lumber Grader (SLG).

The Model 7200 HCLT is an inline, longitudinal Machine Stress Rating (MSR) system, best-suited for high-volume mills that want high speed, highest grade yield recovery and ability to set a low E threshold for each grade. This grading method mechanically applies stress over the full length of the lumber and makes a direct measurement of stiffness to accurately determine modulus of elasticity (E).

The Model 2350 SLG is the result of over four decades of experience in the design, manufacture and servicing of acoustics and lumber grading equipment. This acoustic method of producing machine graded lumber is installed in a transverse lug chain making it ideal for mills with limited space.

Ultrasonic Veneer Grading

Metriguard pioneered the ultrasonic grading of veneer sheets that are used in the manufacture of laminated veneer lumber (LVL). This process allows LVL manufacturers to efficiently use the wood resource to produce engineered wood products with reliable mechanical properties – a key factor in meeting the demand for cost-effective, easy to work, structural wood building components. Find out more about our Veneer grading equipment.

Tensile Proof Testing

Our Tension Proof Testers grip the test specimen, apply a test load with hydraulic cylinders, and measure the load applied. Maximum load attained while the specimen is loaded to failure is displayed.

Panel Testers

Metriguard offers a trio of structural panel quality control testing machines. With an automated test sequence, data recording and storage and network connectivity, these machines are key to quality control programs in multiple structural panel manufacturing plants, regardless of which agency provides certification. In addition, parts, repairs and service are readily available to keep these vital machines operating and contributing to panel producers’ quality programs.

Field & Lab Equipment

Stress Wave Timer, Impact Hammer, Laboratory Clamps, Accelerometers, Transverse Vibration E-Computer, Static Bending Tester, Minnesota Shear Tester, Compression Parallel Tester

Guardrail Post Tester

Metriguard has developed a prototype device to detect internal decay in wood guardrail posts. This lightweight, portable device is easy to use and can quickly assess the quality of an installed post. While this device is still in the development stage, we believe that a commercial version will be an invaluable diagnostic tool for highway asset management. Future development includes devices specifically designed to detect decay in wood utility poles and bridge timbers. Click here for more info.

This device has shown very promising results and demonstrated improved accuracy over sounding and visual inspection in a study conducted by Washington State University for the Washington State Department of Transportation. Link to study.

Grain Angle Meters

Metriguard Grain Angle Meters are handheld devices that quickly and accurately measure grain angle on flat surfaces (Model 511) and round and cylindrical surfaces (Model 512).

Hydraulic Power Options

Metriguard offers a number of hydraulic pump options so you may optimize performance, convenience, and cost. If you are unsure as to the best option for your application, give us a call.

Force Measurement Systems

Metriguard offers a variety of force measurement options for optimum system configuration and flexibility. Our sales department would be happy to discuss the best fit for your application or how to optimize performance in your operation.

Spray Marking Options

Most of our production-line machines can mark your lumber product in various ways. From the options listed here, you may select the equipment that will give you the best quality, style, and location of ink marking.

Metriguard offers a variety of single nozzle and multiple nozzle and valve arrays for marking wood products. Our nozzles are available with 115 Vac and high-speed low-voltage solenoid control in several mounting configurations with or without ink tank systems. These systems, on a variety of Metriguard products, are available for use anywhere ink spray marking is required.