Wood Column Design (NDS 2024)

Design sawn-lumber columns per NDS 2024: compression, column stability (CP), slenderness, combined bending + axial (NDS §3.9.2). Built-in lumber database with 4 species, 3 grades.

NDS 2024Column Stability CPLe/d CheckCombined Loading

Calculation results are decision-support tools. The design engineer must review and verify all results independently.

Species & Grade

Wood Species

Lumber Grade

Reference Design Values (NDS Supplement)

F_c = 1350 psi | F_b = 900 psi | E = 1.6M psi | E_min = 580K psi

Column Size

Size Selection

Lumber Designation

Column Geometry

Unbraced Length (ft)

End Condition - Weak Axis

End Condition - Strong Axis

Applied Loads

Axial Compression Load (lb)

Moment - Strong Axis (ft-lb)

Moment - Weak Axis (ft-lb)

Set moments to 0 for pure compression. Non-zero values enable combined bending+axial check (NDS §3.9.2).

Service Conditions & Factors

Moisture Condition

Temperature

Load Duration Factor (CD)

Default is Normal 10-year (CD = 1.0) for typical occupancy loads

Incised treatment (Ci factors apply)

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Wood Column Design (NDS 2024)

Select species/grade, column size, loads, and end conditions, then click Design Wood Column.