Timber Construction

Visualization of a timber construction
Visualization of a timber construction

The timber checks are designed for buildings and engineering constructions under observance of the EN 1995-1-1, EN 1995-1-2 and DIN 1052 for beam elements.

Options for Timber Checks:

  • EN 1995-1-1 and EN 1995-1-2, DIN 1052
  • Automatic combination
  • Check of every set of internal forces considering the modification factor kmod
  • Checks under fire conditions
  • Integrated buckling check
  • Checks for the deflection of beams

Actions, Design Situations

The checks are carried out after the static calculation. For this purpose the load cases are assigned to the actions. Taking into account the preset safety factors and combination coefficients defined in EN 1990, DIN 1052 or DIN 1055-100, the program automatically calculates the internal forces for the desired design situations.

Cross-Section Checks

For every set of internal forces the modification factor kmod will be determined from the service class and the load-duration. Then the following checks will be performed:

  • Tension parallel to the grain
  • Compression parallel to the grain
  • Bending
  • Combined bending and axial tension
  • Combined bending and axial compression
  • Shear from lateral force
  • Torsion
  • Combined shear and torsion

Buckling Check with Equivalent Beam Method

The buckling checks are carried out according to the equivalent beam method as described in EN 1995, Chapter 6.3.2 and DIN 1052, Chapter 10.3, respectively.

Design Method for Fire Conditions

Structural fire design is carried out according to the reduced cross-section method as described in EN 1995-1-2, Chapter 4.2.2. For this, the flame-edges, the duration of the fire and the charring rate ßn are evaluated.

Checks for the Deflections of Beams

In accordance with EN 1995-1-1, Chapter 7.2, the deflections of beams should not exceed the values in Table 7.2. For this purpose, the instantaneous deflection is determined in accordance with Chapter 2.2.3 for the characteristic and the final deflection for the quasi-permanent design situation.

Utilization, Results

The utilization is defined as the ratio between the action Ed and the resistance Rd of a cross-section.

The following results are available:

  • Utilization of the beams for each situation.
  • Maximal utilization of the beams of all situations.
  • Maximal utilization of the sections of all situations.

Additionally the extremal design values for internal forces, support reactions, deformations, soil pressures and stresses are saved for all check situations. The detailed log also lists the decisive combination internal forces of all design situations for each result location.

References

DIN 20000-3:2015-02
Anwendung von Bauprodukten im Bauwesen –
Teil 3: Brettschichtholz und Balkenschichtholz nach DIN EN 14080
(Application of construction products in structures –
Part 3: Glued laminated timber and glued solid timber according to DIN EN 14080)
Publisher: DIN Deutsches Institut für Normung e.V., Berlin.
Beuth Verlag, Berlin 2015.

DIN EN 1990/NA/A1:2012-08
Nationaler Anhang – National festgelegte Parameter –
(National Annex – Nationally Determined Parameters)
Eurocode: Grundlagen der Tragwerksplanung; Änderung A1.
(Eurocode: Basis of Structural Design; Amendment A1)
Publisher: DIN Deutsches Institut für Normung e. V., Berlin.
Beuth Verlag, Berlin 2012.

DIN EN 1991-1-1/NA:2010-12
Nationaler Anhang – National festgelegte Parameter –
(National Annex – Nationally Determined Parameters –)
Eurocode 1: Einwirkungen auf Tragwerke –
Teil 1-2: Allgemeine Einwirkungen - Brandeinwirkungen auf Tragwerke.
( Eurocode 1: Actions on Structures – Part 1-2: General Actions – Actions on Structures exposed to Fire)
Publisher: DIN Deutsches Institut für Normung e.V., Berlin.
Beuth Verlag, Berlin 2010.

DIN EN 1995-1-1/NA:2013-08
Nationaler Anhang – National festgelegte Parameter –
(National Annex – Nationally Determined Parameters –)
Eurocode 5: Bemessung und Konstruktion von Holzbauten –
Teil 1-1: Allgemeine Regeln und Regeln für den Hochbau.
(Design of Timber Structures – Part 1-1: General – Common Rules and Rules for Buildings).
Publisher: DIN Deutsches Institut für Normung e.V., Berlin.
Beuth Verlag, Berlin 2013.

DIN EN 1995-1-2/NA:2010-12
Nationaler Anhang – National festgelegte Parameter –
(National Annex – Nationally Determined Parameters –)
Eurocode 5: Bemessung und Konstruktion von Holzbauten –
Teil 1-2: Allgemeine Regeln - Tragwerksbemessung für den Brandfall.
(Eurocode 5: Design of Timber Structures – Part 1-2: General – Structural Fire Design)
Publisher: DIN Deutsches Institut für Normung e.V., Berlin.
Beuth Verlag, Berlin 2010.

EN 338:2009
Structural timber – Strength classes
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2010.

EN 1990:2010
Eurocode: Basics of Structural Design.
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2010.

EN 1991-1-1:2010
Eurocode 1: Actions on Structures –
Part 1-1: General Actions.
Densities, Self-Weight, Imposed Loads for Buildings
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2010.

EN 1991-1-2:2010
Eurocode 1: Actions on Structures –
Part 1-1: General Actions – Actions on Structures exposed to Fire
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2010.

EN 1995-1-1:2014
Eurocode 5: Design of Timber Structures –
Part 1-1: General – Common Rules and Rules for Buildings.
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2014.

EN 1995-1-2:2010-12
Eurocode 5: Design of Timber Structures – Part 1-2: General – Structural Fire Design
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2010.

EN 14080:2013
Timber structures – Glued laminated timber and glued solid timber – Requirements
Publisher: CEN European Committee for Standardization, Brussels.
Beuth Verlag, Berlin 2013.

Harrington, J.; Jacob, M.; Short, C.
Handbook on structural timber design to Eurocode 5.
Publisher: National Council for Forest Research and Development (COFORD).
COFORD, Dublin 2006.

OENORM B 1990-1:2004-05
Eurocode: Grundlagen der Tragwerksplanung –
Nationale Festlegungen zu ÖNORM EN 1990 Anhang A1:2003.
(Basics of Structural Design – National Specifications for OENORM EN 1990 Annex A1:2003).
Publisher: ON Österreichisches Normungsinstitut, Vienna.
Österreichisches Normungsinstitut, Vienna 2004.

OENORM B 1991-1-2:2003-12
Eurocode 1: Einwirkungen auf Tragwerke –
Teil 1-2: Allgemeine Einwirkungen - Brandeinwirkungen auf Tragwerke.
Nationale Festlegungen zu ÖNORM EN 1991-1-2.
(Eurocode 1: Actions on Structures – Part 1-2: General Actions – Actions on Structures exposed to Fire. National Specifications for OENORM EN 1991-1-2.)
Publisher: ON Österreichisches Normungsinstitut, Vienna.
Österreichisches Normungsinstitut, Vienna 2003.

OENORM B 1995-1-1:2015-06
Eurocode 5: Bemessung und Konstruktion von Holzbauten –
Teil 1-1: Allgemeine Regeln und Regeln für den Hochbau.
Nationale Festlegungen zu ÖNORM EN 1995-1-1.
(Design of Timber Structures – Part 1-1: General – Common Rules and Rules for Buildings.
National Specifications for OENORM EN1995-1-1).
Publisher: ON Österreichisches Normungsinstitut, Vienna.
Österreichisches Normungsinstitut, Vienna 2015.

OENORM B 1995-1-2:2011-09
Eurocode 5: Bemessung und Konstruktion von Holzbauten –
Teil 1-2: Allgemeine Regeln - Bemessung für den Brandfall.
Nationale Festlegungen zu ÖNORM EN 1995-1-2.
(Design of Timber Structures – Part 1-2: General – Structural Fire Design.
National Specifications for OENORM EN 1995-1-2).
Publisher: ON Österreichisches Normungsinstitut, Vienna.
Österreichisches Normungsinstitut, Vienna 2011.

Porteous, J.; Abdy, K.
Structural Timber Design on Eurocode 5.
Blackwell Publishing Ltd, Oxford 2007.

SS EN 1990:2011-04
Application of SS EN 1990
Publisher: Swedish Board of Housing, Building and Planning (Boverket).
Boverket, Karlskrona 2011.

SS EN 1991-1-2:2011-04
Application of SS EN 1991-1-2
Publisher: Swedish Board of Housing, Building and Planning (Boverket).
Boverket, Karlskrona 2011.

SS EN 1995-1-1:2011-04
Application of SS EN 1995-1-1.
Publisher: Swedish Board of Housing, Building and Planning (Boverket).
Boverket, Karlskrona 2011.

SS EN 1995-1-2:2011-04
Application of SS EN 1995-1-2
Publisher: Swedish Board of Housing, Building and Planning (Boverket).
Boverket, Karlskrona 2011.

Werner, G.; Zimmer, K.
Holzbau 2 – Dach- und Hallentragwerke nach DIN 1052 (neu 2008) und Eurocode 5.
(Timber Structures 2 – Roof and Hall Structures According to DIN 1052 (new 2008) and Eurocode 5.).
4., neu bearbeitete Auflage. (4th newly reworked edition).
Springer Verlag, Berlin 2010.