Frame3Dgrid-based 3D frame analysis

Grids and levelscoordinates must increase down the table
X grids (A, B, C…)
GridX (m)
Y grids (1, 2, 3…)
GridY (m)
Levels (Z, positive up)
LevelElevation (m)
Sections2 defined

For beams D is the vertical depth and B the width. For columns D is the dimension along X and B along Y.

SectionD (mm)B (mm)E (GPa)νγ (kN/m³)
Beams12 beams

A beam along X sits on a Y grid and runs from one X grid to another, and vice versa. It is split into an element at every grid it crosses, so results run continuously along the line.

BeamAlongOn gridLevelFromToSection
Columns9 columns
ColumnX gridY gridFrom levelTo levelSection
Supports9 supports
X gridY gridLevelSupport
Analysis options
Loadsone combined case — enter factored values

Single combined load case: enter already-factored values. Global Z is up, so beam and slab loads in direction Z are gravity and a positive number acts downward. Joint loads use signed global axes.

Beam loads — UDL/trapezoidal (w₁→w₂ over x₁…x₂) or point load P at x₁, measured from the beam’s first grid. Blank x₁/x₂ means the full length.
BeamTypew₁ (kN/m)w₂ (kN/m)P (kN)x₁ (m)x₂ (m)Direction
Slab loads — area load on a panel, distributed to its edge beams by tributary area (two-way: triangles on the short edges, trapezoids on the long ones).
LevelX fromX toY fromY toq (kN/m²)Distribution
Joint loads — at a grid intersection and level, in signed global axes.
X gridY gridLevelFx (kN)Fy (kN)Fz (kN)Mx (kN·m)My (kN·m)Mz (kN·m)
50×
Isometric · Orthographic
X across · Y into page · Z up  ·  ?
Model view height640px

Run the analysis to see reactions, diagrams along each grid line, member forces, deflections and the full calculation steps.