For rectangular sections: A = bh, I = 1/12 bh3 Esteel ≅ 200 GPa, Econcrete ≅ 30 GPa, Ewood ≅ 10 GPa
For rectangular sections: A = bh, I = 1/12 bh3 Esteel ≅ 200e9 Pa, Econcrete ≅ 30e9 Pa, Ewood ≅ 10e9 Pa
For rectangular sections: A = bh, I = 1/12 bh3 Esteel ≅ 30e6 psi, Econcrete ≅ 4e6 psi, Ewood ≅ 1.5e6 psi
Matrix
Beam
Load
Displac.
Model
Bottom fibers are always shown downward – matrices may appear inconsistent with the model. Go to Settings > Bottom Fibers > User.
Beam Matrix ##, Local
Beam Load Vector ## Local, Primary
Beam Displacement Vector ## Local, Primary
Model Stiffness Matrix
Files
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Autotune Live ((full)) Crack May 2026
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Loads
Single
Distributed
Temperat.
Load cases
L
Click the 'Loads' button on the toolbar to create a new load
Click the 'Loads' button on the toolbar to create a new load
Click the 'Loads' button on the toolbar to create a new load ΔT0: positive temperature expands, negative shrinks ΔT1 = Tbottom – Ttop. Positive gradient = bottom is warmer (and vice versa) (Bottom = dashed line along each beam)
Sections
L
Press Sections from the Toolbar to insert a new section
Nodes
L
Nodes are automatically created as you draw a new beam
Imposed displacements
L
Imposed displacements can be applied only in directions where supports provide restraints
Beams
L
Drawing a new beam will automatically add it to this table
Edit section
L
Click the blue label to toggle the notation
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Remove loads?
Deleting a load case %% also removes all associated loads.
New section
Insert or replace section?
O
S
M
V
N
d
Overwrite file?
File '%%' will be replaced by the current project '%%'
Delete file?
File '%%' will be deleted
Hinge insert/remove
On a beam
On all selected beams
Can also be set in the Beam Table
Set displacement
Imposed displacement
Settlements and imposed displacement can be placed on supports/constraints