Use this workshop calculation to turn measured dimensions and the selected construction convention into a cut, spacing, fit, or material-planning value.

Load class

Runner load class: light (30 kg), medium (45 kg), or heavy (60 kg).

Look up the rated load in kilograms for a drawer runner load class. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Rated load (kg)

Rated load capacity in kilograms.

• Nominal dimensions, kerf, moisture movement, hardware clearances, wall squareness, and manufacturer instructions can change the required shop dimension. Measure the actual assembly and test critical joints on scrap before cutting finished material.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Complement the calculated dimension with a physical story stick, dry fit, or full-size layout. Follow the hardware, coating, adhesive, or machine manufacturer's limits where they differ from a rule of thumb.

• Anchor Pull-Out Class Lookup

  Look up the rated pull-out load in kilograms for a metric anchor size.

• Laminate Class Lookup

  Look up the AC rating and maximum commercial service years of a laminate usage class.

• Skirting Height Lookup

  Look up the skirting board height for a standard, tall, or grand style class.