Linear and Quadratic Taper Shape

Tips & Tricks

Right-click a member to open its context menu. Then, select ‘Edit Member’ to open the edit dialog box with the dialog tab ‘Options’. In the lower right corner, you find the option ‘Taper Shape’. Choose between linear or quadratic application. Settings affect the interpolation of the cross‑sectional area and the second moments of area for the determination of stiffnesses along the member length, and consequently of deformations and internal forces.

In general, consider the following items when choosing the taper shape calculation method:

  • If the cross‑section is reduced only in its width or height, select ‘Linear’.
  • If the cross-section is reduced in its width and its height, select ‘Quadratic’ because otherwise the stiffness of the member would be overvalued.

The more distinct the cross‑section reduction is in both direction, the more the cross‑section properties approach the quadratic method.


RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
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The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

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