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Composite Lumber Member Design

Choose between PSL, LVL, LSL, or custom engineered lumber and design for tension, compression, bending, shear, and combined loading.

Seamlessly design structural composite lumber (SCL), also known as engineered lumber, with CalcBook. The interface supports NDS requirements and allows you to define axial loads as well as bending and shear demands about both axes. Adjustment factors are applied automatically, and the output presents intermediate values and governing equations in a clear, traceable format.

Included Member Types:


  • PSL

  • LVL

  • LSL

  • Custom Members


Included Modification Factors:


  • Load Duration

  • Wet Service

  • Temperature

  • Beam Stability

  • Volume

  • Repetitive Member

  • Column Stability

  • Bearing Area

  • Format Conversion

  • Time Effect


Design Checks Available:


  • Tension

  • Compression

  • Bending (strong & weak axis)

  • Shear (strong & weak axis)

  • Combined Loading




Calculation Screenshots

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