Permissible Clear Spans for (to )

Imposed load

Strength class

Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span in metres.
Click on a span to generate a full calculation (you can adjust the exact span).
This span table is to the format and methodology given in .
These spans were calculated using our calculation engine.
These span tables are the equivalent of other industry-standard span tables and are calculated to the same standards.
This table uses commonly available UK regularised timber depths.
Read the notes at the bottom of the table for assumptions, references and related standards.

	Dead load per square metre (in kN/m²) supported by


Width × depth (mm)
Width × depth (mm)	Permissible (metres)