DELIVERING TIMBER ENGINEERING EXCELLENCE

Span Capability Chart

Span Table

The below span tables are to be used as a basic size guide for our easi-joist®. Designed to achieve a given span, depth and centres for feasibility only.

Due to variations in timber grades, load sets, support conditions and bearing widths, the tables are not suitable as a design tool. Please contact us for more information and design assistance.

Depth (mm) Width (mm) Span @ 400 c/c Span @ 600 c/c
219 72 ZERO to 4800 ZERO to 4350
219 97 4801 to 5150 4351 to 4775
219 122 5151 to 5450 4776 to 5125
219 147 5451 to 5700 5126 to 5250
254 72 ZERO to 5225 ZERO to 4800
254 97 5226 to 5625 4801 to 5300
254 122 5626 to 5950 5301 to 5600
254 147 5951 to 6200 5601 to 5625
304 72 ZERO to 5800 ZERO to 5600
304 97 5801 to 6225 5601 to 6000
304 122 6226 to 6575 6001 to 6325
304 147 6576 to 6875 6326 to 6600
417 72 ZERO to 6900 ZERO to 6000
417 97 6901 to 7400 6001 to 7125
417 122 7401 to 7825 7126 to 7250
417 147 7826 to 7900

General notes:

  • When your floor is designed, the maximum span assumes that a 100mm wide support bearing has been achieved.
  • Lateral restraint is provided by a suitably fixed floor deck, which will prevent bucking of the compression flange.
  • Support condition web direction/orientation can affect the spanning capacity of a joist.
  • Strongbacks to be used for spans over 4m.
  • Floor details can be found on our “Floor Joists” page.

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