FAQ 004349 EN-US

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

Is it possible to perform fire resistance design of cross-laminated timber panels in RF‑LAMINATE?

Answer

Fire resistance design is not implemented in the RF‑LAMINATE add-on module by default.

However, you can calculate the charring rates yourself and consider them accordingly in the module. In the following example, this is explained on a simple plate.

Structural system (Figure 01):

  • Span 5 m
  • Plate width 2 m
  • LC1 (permanent) 1 kN/m² plus dead load
  • LC2 (medium) 2.5 kN/m²
  • 3 layers
    • S1 35 mm C24
    • S2 20 mm C24
    • S3 35 mm C24
The information regarding the correction factors and stiffnesses can be found in the attached file.

Factors for fire resistance:

  • Charring rate ß0 = 0.65 mm/min
  • Pyrolysis zone k0d0 = 7 mm
  • Charring time t = 30 min
  • Effective thickness def=t ß0+k0d0=30 min × 0.65 mm/min+7 mm = 26.5 mm
Remaining thickness of Layer 3 = 35 − 26.5 = 8.5 mm > 3 mm → thickness may be applied. (Figure 02)

Because of the modified layer thicknesses, a new stiffness matrix results, which is applied in RFEM for accidental combinations with the characteristic stiffness values. For the ultimate limit state, the design values are calculated here (Figure 03).

Keywords

Cross-laminated timber Fire resistance Pyrolysis zone Charring rate

Downloads

Write Comment...

Write Comment...

  • Views 504x
  • Updated 02/26/2021

Contact us

Contact Dlubal

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

(267) 702-2815

info-us@dlubal.com

Online training | English

RFEM for Students | Part 2

Online Training 05/17/2021 2:00 PM - 4:30 PM CEST

Online Training | English

Eurocode 5 | Timber structures according to DIN EN 1995-1-1

Online Training 05/20/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM | Structural dynamics and earthquake design according to EC 8

Online Training 06/02/2021 8:30 AM - 12:30 PM CEST

Glass Design with Dlubal Software

Glass Design with Dlubal Software

Webinar 06/08/2021 2:00 PM - 2:45 PM CEST

Online training | English

RFEM for Students | Part 3

Online Training 06/15/2021 2:00 PM - 4:30 PM CEST

Online Training | English

RFEM | Basics | USA

Online Training 06/17/2021 9:00 AM - 1:00 PM EDT

Blast Time History Analysis in RFEM

Blast Time History Analysis in RFEM

Webinar 05/13/2021 2:00 PM - 3:00 PM EDT

timber structures | Part 2: design

Timber Beam and Surface Structures | Part 2: Design

Webinar 05/11/2021 2:00 PM - 3:00 PM CEST

Plate and Shell Buckling Utilizing Dlubal Software

Plate and Shell Buckling Utilizing Dlubal Software

Webinar 03/30/2021 2:00 PM - 2:45 PM CEST

CSA S16:19 Steel Design in RFEM

CSA S16:19 Steel Design in RFEM

Webinar 03/10/2021 2:00 PM - 3:00 PM EDT

The Most Common User Errors With RFEM and RSTAB

The Most Common User Errors With RFEM and RSTAB

Webinar 02/04/2021 2:00 PM - 3:00 PM BST

ADM 2020 Member Design in RFEM

ADM 2020 Member Design in RFEM

Webinar 01/19/2021 2:00 PM - 3:00 PM EDT

Dlubal Info Day

Dlubal Info Day Online | December 15, 2020

Webinar 12/15/2020 9:00 AM - 4:00 PM BST

FEA Troubleshooting and Optimization in RFEM

FEA Troubleshooting and Optimization in RFEM

Webinar 11/11/2020 2:00 PM - 3:00 PM EDT

Soil-Structure Interaction in RFEM

Soil-Structure Interaction in RFEM

Webinar 10/27/2020 2:00 PM - 2:45 PM BST

NBC 2015 Modal Response Spectrum Analysis in RFEM

NBC 2015 Modal Response Spectrum Analysis in RFEM

Webinar 09/30/2020 2:00 PM - 3:00 PM EDT

Documenting Results in the RFEM Printout Report

Webinar 08/25/2020 2:00 PM - 2:45 PM CEST

ACI 318-19 Concrete Design in RFEM

ACI 318-19 Concrete Design in RFEM

Webinar 08/20/2020 2:00 PM - 3:00 PM EDT

How to Be More Productive Using RFEM

How to Be More Productive Using RFEM

Webinar 07/07/2020 3:00 PM - 4:00 PM CEST

Introduction to Solid Modeling \n in RFEM

Introduction to Solid Modeling in RFEM

Webinar 06/30/2020 2:00 PM - 3:00 PM EDT

Modeling with Solids in RFEM

Modeling with Solids in RFEM

Webinar 06/09/2020 3:00 PM - 3:45 PM CEST

CSA A23.3 Concrete Design in RFEM

CSA A23.3:19 Concrete Design in RFEM

Webinar 05/14/2020 2:00 PM - 3:00 PM EDT

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
RFEM Other
RF-LAMINATE 5.xx

Add-on Module

Deflection analysis and stress design of laminate and sandwich surfaces

Price of First License
1,120.00 USD