Design Capacity Tables for Timber (DCTT) - Part A (seasoned)

The Design Capacity Tables for Timber (DCTT) is a design aid for structural engineers. It provides assistance in the limit states modelling of timber behaviour and can be used for:

  • Design - the selection of members to carry given design loads
  • Capacity determination - performance prediction of known members.

The DCTT helps to save effort, time and cost in the design of structural timber. 


Supporting documents

Three supporting documents, which can be downloaded below, have been prepared to make the tables in this section easier to use: 

  • DCTT - Introduction
  • DCTT - Guidance
  • DCTT - Design parameters


Table information

Each grade contains seven tables with one table per page. There are four bending tables, two compression tables and one tension table for each grade.

  • Bending data - general (serviceability, fully restrained strength data)
  • Bending data - compression edge restraint (strength with regular restraints on compresssion edge)
  • Bending data - tension edge restraint (strength with regular restraints on the tension edge)
  • Bending data - FLR tension edge restraint and torsional restraint (strength with flybraces)
  • Compression data - lateral restraint against major axis buckling
  • Compression data - lateral restraint against minor axis buckling
  • Tension data - different configurations of bolt holes.


This page contains the seasoned tables in the DCTT. Each table name starts with the name of the grade (the suffix 's' indicates a seasoned product):

  • A17s
  • F27s
  • F17s
  • F7s
  • F5s
  • MGP10 - coming soon
  • MGP12 - coming soon

You can obtain the unseasoned tables here.


(You need to be logged in to WoodSolutions to download resources from this section)



PDF icon introduction1.pdf881.95 KB
PDF icon guidance2.pdf887.09 KB
PDF icon appendixA.pdf468.78 KB
PDF icon TableA17s.pdf313.93 KB
PDF icon TableF27s.pdf302.17 KB
PDF icon TableF17s.pdf323.44 KB
PDF icon TableF7s.pdf318.25 KB
PDF icon TableF5s.pdf331.88 KB

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