Design Settings > Steel > Steel Joists

Tekla Structural Designer
2021
Tekla Structural Designer

Design Settings > Steel > Steel Joists

Note: Steel joists are only applicable in the US.
Setting Description

Uniform load tolerance

If the calculated percentage load tolerance for steel joists is less than this value, the load is classified as Uniform.

Equivalent load tolerance

If the calculated percentage load tolerance for steel joists is greater than this value, the load is classified as Non-uniform.

Note: If 0% equivalent load tolerance is specified, only pure uniform loading is accepted.

Maximum sum of concentrated loads

Allows you to specify a user-defined maximum sum of concentrated loads that limits K, LH and DLH joists. If any concentrated loads exceed the specified maximum sum, the relevant load combination is classified as Non-uniform.

Maximum eccentricity of zero shear

In the equivalent uniform load method, the position of the point of zero shear relative to the center span point of the joist is determined.

The option allows you to specify the maximum eccentricity of zero shear value in the equivalent uniform load method. If the position is located outside the value, the load is classified as Non-uniform.

Deflection increase to allow for shear

Deflections due to live load are calculated using the following effective inertia value:

Ieffective = Igross / (1 + R),

where

R = the deflection increase to allow for shear effects (defaulted to 15%) and applied to KCS only.

The option allows you to adjust the value of R, (the deflection increase to allow for shear, percentage).

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