Timber Column Calculator to AS1720.1

This calculator designs timber members in compression, like columns and truss struts, by ensuring the member meets compression requirements to Ultimate Limit State (ULS) methods. 
📝 This calculation has been written in accordance with AS 1720.1-2010 Design Methods for Timber Structures
Check out our Timber Design Standards - AS1720 and AS1684 for further explanation about timber design for compression members.
CalculationAssumptions
Material Properties
Column Geometry
﻿﻿Condition of end restraint
:Restrained at both ends in position only​
﻿
﻿﻿D
:{"mathjs":"Unit","value":150,"unit":"mm","fixPrefix":false}​
﻿
﻿﻿B
:{"mathjs":"Unit","value":100,"unit":"mm","fixPrefix":false}​
﻿
﻿﻿Ag
:15000​
﻿
﻿
﻿﻿L 
:{"mathjs":"Unit","value":2000,"unit":"mm","fixPrefix":false}​
﻿
﻿﻿Lax
:{"mathjs":"Unit","value":2000,"unit":"mm","fixPrefix":false}​
﻿
﻿﻿Lay
:{"mathjs":"Unit","value":2000,"unit":"mm","fixPrefix":false}​
﻿
﻿
﻿
Loads
Modification Factors
ULS Compression Check
﻿﻿ϕ
:0.95​
﻿
Capacity reduction factor
﻿﻿Nd,c
:190.848214285714​
﻿
﻿﻿N*
:150​
﻿
﻿﻿Utilisation
:0.785964912280703​
﻿
﻿﻿Design status
:PASS​
﻿
﻿
Nd,c=ϕk1k4k6k12fc′AgN_{d,c} = \phi k_1k_4k_6k_{12}f'_cA_gNd,c​=ϕk1​k4​k6​k12​fc′​Ag​
Related ResourcesTimber Design Standards - AS1720 and AS1684
Wood Beam Calculator to AS 1720.1
Timber Beam Calculator to EC5
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