7200 HCLT


High Capacity Lumber Tester

The model 7200 HCLT in an inline Machine Stress Rating (MSR) system. In addition to a direct measurement of Modulus of Elasticity (E), Metriguard’s 7200 HCLT applies stress to each individual piece of lumber, causing breakage and elimination of very weak pieces – the only mechanical grading equipment that can make that claim.

  • Grades dimension lumber at speeds up to and exceeding 3600 ft/minute (1098 m/minute)
  • Certified for MSR, MEL, E-Rated Lumber, MGP, and MSG grades
  • Measures stiffness directly to accurately determine modulus of elasticity (E)
  • Provides best grading accuracy and consistency for the best profit
  • Applies stress over the full length of the lumber
  • Features patented "Stressed in Bending" mechanics: the only technology that responds accurately to grain angle, microfibril angle, and moisture content in lumber
  • Modular design simplifies maintenance and repairs
  • Processes lumber widths 2.5 to 11.4 in (63.5 to 290 mm) & thicknesses 1.2 to 1.8 in (30.5 to 45.5 mm)
  • Produces lumber for structural applications including trusses, joists, purlins, and E-rated laminate stock
  • Installs just inches from your planer outfeed so space requirements are reduced
  • Shifting base quickly swaps a bypass conveyor for the 7200 in the production line
  • Unlimited configuration files for grade combinations and sizes
  • Includes performance monitoring & troubleshooting tools for ease of maintenance
  • Records production and calibration data automatically
  • PC Data System features a touch screen for quick, easy user interface
  • The PC Data System displays real-time grade and E readings
  • PC Data System processing eliminates analog system drift and ambiguity, and makes the lumber grading data compatible with other Windows-based data analysis programs
  • Production run information tallied for later analysis in an Excel-based utility which generates reports & charts from each shift’s data
  • PC Data System can network with other computers in the plant to share data & ease its evaluation
  • Features enhanced spray marking capabilities
  • Bends the lumber in two directions in the machine’s two bending sections with the bending forces measured & combined to compute Local E along the piece length
  • Average E & Low-Point E values are compared against operator-selected thresholds to determine the MSR grade
  • Data for each board can be passed via serial port to optimizing systems downstream

Dimensions (LxWxH)

7200 HCLT 188 x 40 x 58 in (4650 x 1020 x 1520 mm)
PC Data System 24 x 24 x 72 in (610 x 610 x 1820 mm)
Shifting Base 204 x 40 x 45 in (5180 x 1020 x 1140 mm)
Bypass Conveyor 190 x 28 x 34 in (4830 x 710 x 860 mm)


7200 HCLT 9000 lbs (4100 kg)
PC Data System 550 lbs (250 kg)
Shifting Base System 550 lbs (250 kg)
Bypass Conveyor 700 lbs (320kg)

Electrical Power

7200 440 to 480 Vac, 3-phase, 60 Hz, 40 A (full-load operating) for three 10-hp (7.5 kW) motors, unless otherwise specified
PC Data System Multi-tap transformer, single phase, 60Hz (50 Hz available)
Bypass Conveyor 440 to 480 Vac, 3-phase, 60 Hz for one 10-hp (7.5 kW) motor

Pneumatic Power

7200 90 to 120 psi (620 to 1200 kPa) shop air at 5 cfm (140 l/min)


Speed Up to 3600 ft/min (to 1098 m/min)
Non-standard speeds are attainable by the use of frequency drive systems and other special equipment. Actual speed is set at the time of ordering.
Planed lumber sizes 2x3 to 2x12 (nominal North American sizes)
Lumber Thickness 1.2 in to 1.8 in (30.5 mm to 45.5 mm)
For thickness other than 1.5 in (38.1 mm) and/or to run multiple thicknesses, optional two-piece pushrods are required. One-piece pushrods (standard) are recommended for North American applications. Pushrod spacers lengthen the two-piece pushrods so lumber of different thicknesses can be graded without resetting stopbolts. Mills producing metric-sized lumber may switch between 35 mm and 45 mm with a 10 mm spacer assembly. (Call for information.)
Lumber Width 2.5 to 11.4 in (63.5 to 290 mm). Zero to light crook required for widths of 10.25 in (260 mm) or greater.
Lumber Length 8 to 30 ft (2.5 to 9 m) (random)

Lumber Flow

Lumber is fed flatwise and longitudinally into the machine. Bending-E measurements are made while the material flows through the machine. Machine grade is sprayed on each piece with a color ink spray.

Grading Method

Local flat-wise, bending E measurements are obtained from two 4-ft (1219 mm) bending spans. This double-bend measurement and digital data processing compensate for deviations from straightness in the wood. Average E, Low-point E and Low-point/Average ratio values are determined for each piece from the Local E measurements. Grade thresholds are set by the operator and stored in the PC Data System configuration files.

Data Output

Digital readout shows Average E and Low-point E in Mpsi, GPa, or other units. Piece data, tallies, and shift reports may be displayed and saved to disk for later analysis. Piece grade can be determined from any combination of Average E, Low-point E, and/or Low-point/Average ratio.