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Wood
Beam Design
Column Design
Diaphragm
Shear Wall
Connections
Hold-down & Anchorage
Sill-Plate Anchorage
Chord & Collector
Stud / Bearing Wall
Joist & Rafter
Header / Lintel
Bearing & Notch
Continuous Beam
Fire Resistance
CLT Panel
Wood Shrinkage
Floor Vibration
Deck Designer
Building Project
Mechanical
HVAC Load · Manual J
Floor Vibration
Floor vibration screening: frequency + 1-kip point-load deflection.
Code edition
NDS 2018
NDS 2024
Design diagram
— updates live with your inputs
Member & Material
Material type
Sawn Lumber
Glulam
LVL
PSL
Species
Douglas Fir-Larch
Hem-Fir
Southern Pine
Spruce-Pine-Fir
Sawn lumber only
Grade
Select Structural
No.1
No.2
No.3
Stud
Sawn lumber only
Standard section
Custom…
2x4 (1.5 × 3.5 in)
2x6 (1.5 × 5.5 in)
2x8 (1.5 × 7.25 in)
2x10 (1.5 × 9.25 in)
2x12 (1.5 × 11.25 in)
2x14 (1.5 × 13.25 in)
3x6 (2.5 × 5.5 in)
3x8 (2.5 × 7.25 in)
3x10 (2.5 × 9.25 in)
3x12 (2.5 × 11.25 in)
4x4 (3.5 × 3.5 in)
4x6 (3.5 × 5.5 in)
4x8 (3.5 × 7.25 in)
4x10 (3.5 × 9.25 in)
4x12 (3.5 × 11.25 in)
4x14 (3.5 × 13.25 in)
6x6 (5.5 × 5.5 in)
6x8 (5.5 × 7.5 in)
6x10 (5.5 × 9.5 in)
6x12 (5.5 × 11.5 in)
6x14 (5.5 × 13.5 in)
8x8 (7.5 × 7.5 in)
8x10 (7.5 × 9.5 in)
8x12 (7.5 × 11.5 in)
8x14 (7.5 × 13.5 in)
10x10 (9.5 × 9.5 in)
10x12 (9.5 × 11.5 in)
12x12 (11.5 × 11.5 in)
GL 3-1/8 x 6 (3.125 × 6 in)
GL 3-1/8 x 7-1/2 (3.125 × 7.5 in)
GL 3-1/8 x 9 (3.125 × 9 in)
GL 3-1/8 x 10-1/2 (3.125 × 10.5 in)
GL 3-1/8 x 12 (3.125 × 12 in)
GL 5-1/8 x 9 (5.125 × 9 in)
GL 5-1/8 x 12 (5.125 × 12 in)
GL 5-1/8 x 15 (5.125 × 15 in)
GL 5-1/8 x 18 (5.125 × 18 in)
GL 5-1/8 x 21 (5.125 × 21 in)
GL 5-1/8 x 24 (5.125 × 24 in)
GL 6-3/4 x 15 (6.75 × 15 in)
GL 6-3/4 x 18 (6.75 × 18 in)
GL 6-3/4 x 21 (6.75 × 21 in)
GL 6-3/4 x 24 (6.75 × 24 in)
GL 6-3/4 x 27 (6.75 × 27 in)
GL 6-3/4 x 30 (6.75 × 30 in)
GL 8-3/4 x 24 (8.75 × 24 in)
GL 8-3/4 x 30 (8.75 × 30 in)
GL 8-3/4 x 36 (8.75 × 36 in)
Width b
(in)
Depth d
(in)
Geometry & Loads
Span
(ft)
Joist spacing
(in)
On center
Sustained dead load
(psf)
Acceptance
Target frequency
(Hz)
>= 15 Hz for good performance
Point-load defl. limit
(in)
Under a 1-kip mid-span load
Run calculation
NDS 2018