The Canadian Wood Council’s Beam Calculator has been developed for the purpose of information only. Although all possible efforts have been made to ensure that the information from this tool is accurate, the CWC cannot guarantee the completeness, accuracy or exactness of the information. Reference should always be made to the appropriate building code and/or standard. The Calculator should not be relied upon as a substitute for legal or design advice, and its user is responsible for how it is used or applied.

Beam Calculator

Powered by WoodWorks® Sizer

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Area load (kPa):Point load (kN):
Tributary width (m):
Location (m):

Designed using WoodWorks® Sizer according to the National Building Code 2015 Part 4 and the CSA O86-14 Standard - Engineering design in wood. Design must be verified by a qualified engineer. Please refer to the tutorial video for instructions.

Maximum allowable floor or roof joist spacing is 610 mm (2 feet).
Snow and wind loads should not include the Importance factor (O86, which is calculated using the selected Importance Category.
Beam is top-loaded over its full width and uniformly over its entire length. Self-weight is automatically included.
Live and snow loads are not simultaneously applied.
Lumber plies are continuous between supports, and beam must be laterally restrained at support points.
Top of joist must be laterally restrained throughout it’s length; bottom must be restrained at support points.
Beam is supported through it’s entire width by a wood member of the same species and grade.
Deflection is limited to 1/180 of main span; deflection due to live and snow loads to 1/240. Cantilever deflection is not considered

For other design conditions, use WoodWorks® Sizer. These include:
  • Design of solid timber, glulam, SCL, and I-joists
  • Design of columns and walls
  • Sloped, rotated and/or notched beams
  • Partial and non-uniform loads or multiple point loads
  • Moving live, storage, controlled fluids, earthquake, dead soil and hydrostatic loads
  • Deflection limits according to your application, and cantilever deflections
  • Detailed lateral restraint conditions and lateral stability design options
  • Bearing design of supporting members
  • Fire design and floor vibration design