Timber beam deflection checks  EC
 Dead, Imposed, Wind, Snow and Total loads for instantaneous deflections
 Total load deflections can optionally consider the effects of creep deformation in design
Specify deflection checks
 Dead  relative span/factor limit of 300 applied
 Imposed  relative span/factor limit of 300 applied
 Wind  not applied
 Snow  not applied
 Total loads  relative span/factor limit of 250 applied
You can modify the deflection checks you require in either the beam properties window or dialog. Limits can be defined as a span over factor limit, an absolute value limit or both.
Deflection design cases

Individual loadcase deflections are taken at the location of maximum deflection for the combination.
 The deflection values are taken as the absolute value of the maximum positive and negative major axis relative deflections.
 The deflection for each load type for a single combination is the sum of all related loadcase deflections factored by the associated load combination factor. The maximum deflection across all load combinations is taken as the controlling value.
Long term deflections due to creep effects
Tekla Structural Designer automatically determines the effects of creep and considers the long term deflection in the total load deflection check.
When long term effects are included, only gravity combinations are considered when determining the critical combination, whereas for the instantaneous total load deflection check both gravity and lateral combinations would be considered.
Automatic adjustment of design deflection values
You can choose to apply Modification Factors to the modulus of elasticity and moment of inertia values in order to create the correct distribution of forces in a model.
The relative deflection values reported in the Load Analysis View, (which are determined using E_{analysis}), take these modification factors into account.
When deflection checks are created in the Tedds calculation Tekla Structural Designer automatically adjusts the values so that they are based on unfactored modulus of elasticity and moment of inertia values. They are also further adjusted to use E_{mean} rather than E_{analysis} as the E_{mean} value is typically recommended for serviceability checks under normal conditions.
Limiting the number of deflection cases sent to Tedds
When the calculated deflections are very small, you might decide that checks are not required. In this situation you can choose to specify a lower limit beneath which checks are not performed. This is achieved by specifying an Ignore deflections for reporting value on the Design Forces page in Design Settings.