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005327
Dipl.-Ing. (FH) Gerhard Rehm
2022-11-10

Orthotropy Direction for Layers

Why cannot I define a rotation when defining layers?

Answer:

If no angle can be defined in the "Rotation" column, there is an isotropic material model selected for the material, where stiffnesses are identical in all directions and it is not necessary to define an angle.

FAQ | 005327
EN-US | Flag FAQ
FAQ 005327 | Why cannot I define a rotation when defining layers?
FAQ 005327 | Why cannot I define a rotation when defining layers?
Entering Rotation for Layers with Isotropic Material Model

If you use materials with anisotropic behavior (for example, timber), it is necessary to ensure that the "Orthotropic | Linear Elastic (Surfaces)" material model is selected.

FAQ 005327 | Why cannot I define a rotation when defining layers?
Selecting Material Model

Note: The "Orthotropic | Timber | Linear Elastic (Surfaces)" material model cannot be currently used in combination with the "Layers" thickness type.

As soon as switching to the orthotropic material model, the individual layers can be rotated accordingly.

FAQ 005327 | Why cannot I define a rotation when defining layers?
Entering Rotation for Layers with Orthotropic Material Model
Author

Mr. Rehm is responsible for developing products for timber structures, and he provides technical support for customers.

Events
2024-04-24
Online Training | English
EN-GB | Flag Online Training
RFEM 6 | Students | Introduction to FEM
2024-04-25
Stiffening Design in RFEM 6 Using Building Model
EN-GB | Flag Webinar
Stiffening Design in RFEM 6 Using Building Model
2024-04-25
AISC 360-22 Steel Connection Design in RFEM 6
EN-US | Flag Webinar
AISC 360-22 Steel Connection Design in RFEM 6 (USA)
2024-04-30
Online Training | English
EN-GB | Flag Online Training
RFEM 6 | Students | Introduction to Timber Design
2024-05-02
Construction Stages in Membrane Structures with RFEM 6
EN-GB | Flag Webinar
Construction Stages in Membrane Structures with RFEM 6
2024-05-08
Online Training | English
EN-GB | Flag Online Training
RFEM 6 | Students | Introduction to Reinforced Concrete Design
2024-05-08
Cross-Section Modeling and \n Stress Analysis in RSECTION 1
EN-GB | Flag Webinar
Cross-Section Modeling and Stress Analysis in RSECTION 1
2024-05-15
Online Training | English
EN-GB | Flag Online Training
RFEM 6 | Students | Introduction to Steel Design
2024-05-16
Consideration of Construction Stages in RFEM 6
EN-GB | Flag Webinar
Consideration of Construction Stages in RFEM 6
2024-05-23
Most Frequently Asked Questions Answered by Dlubal Support Team
EN-GB | Flag Webinar
Most Frequently Asked Questions Answered by Dlubal Support Team | May 2024
2024-05-29
Steel Structures in RFEM 6 \n Part 1: Modeling, Load Input
EN-GB | Flag Webinar
Modeling and Design of Steel Structures in RFEM 6 | Part 1: Modeling, Load Input
2024-06-06
Steel Structures in RFEM 6 \n Part 2: Combinations, Design, Documentation
EN-GB | Flag Webinar
Modeling and Design of Steel Structures in RFEM 6 | Part 2: Combinations, Design, Documentation
Videos
FAQ | 005327
EN-US | Flag FAQ
FAQ 005327 | Why cannot I define a rotation when defining layers?
Length: 00:01:01 min
EN-US | Flag Product Feature
Fire Resistance Design of Surfaces for EN 1995, SIA 265, NDS, and CSA O86
Length: 00:00:56 min
EN-US | Flag Product Feature
Accelerograms in Time History Analysis Add-on
Length: 00:01:06 min
EN-US | Flag Event
Webinar | Timber Floor Calculations in RFEM 6
Length: 00:55:27 min
EN-US | Flag Event
RFEM 6 for Students | Introduction to Timber Design | November 29, 2023
Length: 01:10:03 min
EN-US | Flag Product Feature
Cross‑Section Optimization
Length: 00:00:56 min
EN-US | Flag General
RFEM 6 Tutorial for Beginners | 003 Create New Model - Base Data (USA)
Length: 00:04:29 min
EN-US | Flag General
RFEM 6 Tutorial for Beginners | 004 User Interface | Control (USA)
Length: 00:08:28 min
EN-US | Flag General
RFEM 6 Tutorial for Beginners | 006 Modeling | 2D Frame, Taper, Mirror (USA)
Length: 00:05:47 min
Models to Download
Model 000000 | Timber Frame Building
274x
64x
Timber Frame Building
Model 004809 | Cross-Laminated Timber Building
330x
47x
Cross-Laminated Timber Building
Column-Beam Connection HEB 300
356x
21x
Column-Beam Connection HEB 300
Timber Slab
178x
19x
Timber Slab
Model 004717 | Ceiling with Line Releases
232x
26x
Ceiling with Line Releases
Model 004707 | Office Building of Municipal Works in Kirchheim unter Teck, Germany
256x
Office Building Timber Structure with Reinforced Concrete Elements
Model 004695 | Timber Industrial Hall Siegrist Igor Carpenteria
443x
Timber Industrial Hall Siegrist Igor Carpenteria
Model 004625 | Trussed Roof
442x
49x
Trussed Roof
Model 004605 | Timber-Concrete Building
457x
55x
Timber-Concrete Building
Knowledge Base Articles
KB 001848 | Timber Column Design as per the 2018 NDS Standard in RFEM 6
Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.
Image 1: Specific Parameters of Nonlinear Elastic Soil Material Model
The Geotechnical Analysis add-on provides RFEM with additional specific soil material models that are able to suitably represent complex soil material behavior. This technical article is an introduction to show how the stress-dependent stiffness of soil material models can be determined.
Editing DXF File Model Object
This article shows how to create cross-sections using DXF files.
KB 001825 | WebService & API for Analysis of Construction Stages
When calculating regular structures, data input is often not complicated but time-consuming. Input automation can save valuable time. The task described in the present article is to consider the stories of a house as single construction stages. Data is entered using a C# program so that the user does not have to enter the elements of the individual floors manually.
Screenshots
FAQ 005327 | Why cannot I define a rotation when defining layers?
Entering Rotation for Layers with Isotropic Material Model
FAQ 005327 | Why cannot I define a rotation when defining layers?
Entering Rotation for Layers with Orthotropic Material Model
FAQ 005327 | Why cannot I define a rotation when defining layers?
Selecting Material Model
RFEM Model of Palazzo Meridia Office and Retail Building in Nice, France
RFEM Model of Palazzo Meridia Office and Retail Building in Nice, France | © Architecture-Studio
Tower Structure with Wind Load Generation in RFEM 6
Timber Structure with Wind Load Generation in RFEM 6 | © STATIC Solution s.r.o
Exterior View of Gym | © KL-Architectes
Exterior View of Gym | © KL-Architectes
The construction of a gym in Metz
The construction of a gym in Metz | © KL-Architectes
Feature 002792 | Timber Panel Element
Definition of Timber Panel Element
RSTAB 9 results - warping moment Momega [kNm]
RSTAB 9 results - warping moment Momega [kNm]
Product Features
Feature 002792 | Timber Panel Element

Using the "Beam Panel" thickness type, you can model timber panel elements in 3D space. You just specify the surface geometry and the timber panel elements are generated using an internal member-surface construct, including the simulation of the connection flexibility.

Feature 002585 | Fire Resistance Design of Surfaces for EN 1995 and SIA 265

You have the option to perform the fire resistance design of surfaces using the reduced cross-section method. The reduction is applied over the surface thickness. It is possible to perform the design checks for all timber materials allowed for the design.

For cross-laminated timber, depending on the type of adhesive, you can select whether it is possible for individual carbonized layer parts to fall off, and whether you can expect increased charring in certain layer areas.

Feature 002615 | Cross-Laminated Timber Manufacturer Library for USA, Canada, and Switzerland

Among others, the following cross-laminated timber manufacturers are available in the layer structure library:

  • Binderholz (USA)
  • KLH (USA, CAN)
  • Kalesnikoff (USA, CAN)
  • Nordic Structures (USA, CAN)
  • Mercer Mass Timber
  • SmartLam
  • Sterling Structural
  • Superstructures listed in Lignatec Edition 32 "Cross-Laminated Timber of Swiss Production"

By importing a structure from the layer structure library, all relevant parameters are adopted automatically. The library is continually updated.

Geodesic Dome

The Timber Design add-on for RFEM 6 / RSTAB 9 is multi-purpose and combines a large number of additional elements. [*S16332764*] Timber Design Add-on for RFEM 6

Frequently Asked Questions (FAQ)
Why cannot I define a rotation when defining layers?
How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?
How can I define temporary supports for a form-finding process in RFEM& 6?
Which programs do I need for laminate and sandwich structures, or cross-laminated timber (CLT)?
Which Dlubal Software programs can I use to calculate and design timber structures?
Where can I find the support chat for quick assistance on the Dlubal website?
Customer Projects
Siegrist Igor Carpenteria Warehouse in Maggia, Switzerland
Siegrist Igor Carpenteria Warehouse in Maggia, Switzerland
Model of Gym | © BET Moselle Bois
Metz Gym as Showcase of Engineering and Sustainability in Modern Construction, Metz, France
Office Building of Stadtwerke Kirchheim unter Teck, Germany (Rendering) | © MEDIA 4D GmbH
Office Building of Stadtwerke Kirchheim unter Teck, Germany
Quai M, the New Concert Hall in La Roche-sur-Yon, France (© LCA Construction Bois)
New Concert Hall in La Roche-sur-Yon, France
Anoeta Square Roofing
Timber Roof with Folded Plates in Anoeta, Spain
Gazebo in Monbidoupark
Gazebo in Monbijoupark in Bern, Switzerland
King Louis Bridge, Kempten, Germany | © Konstruktionsgruppe Bauen AG
King Louis Bridge in Kempten, Germany
Timber Gridshell "Moritzplatz Demonstrator" in Augsburg, Germany | © Digital Timber Construction DTC, TH Augsburg
Moritzplatz Demonstrator, Augsburg
Apartment House BSH20A "Stories" in Amsterdam, Netherlands | © MWA Hart Nibbrig, Amsterdam
Apartment House BSH20A "Stories" in Amsterdam, Netherlands
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