Calculating Timber Panel Walls | 4. Wall Design
This article describes the design of timber panel walls due to generated horizontal loads.
The wall design refers to the third article of this series.
The wall 4 at the bottom right will be designed in this article. The position of the wall is indicated in Figure 01. You can download the corresponding model with the forces at the end of this article.
The system values are already included in Part 2 , the most relevant ones are listed below.
- Material beam= C24
- Cross-section of beam = 6/12 cm
- Material of sheeting = OSB 3
t = 18 mm one-sided
ρm, O = 439 kg/m³
G = 108 kN/cm²
- kser = 159 N/mm
- bE = b + t = 12 cm + 1.8 cm = 13.8 cm
- Staples d = 1.5 mm, t = 45 mm
- Distance staples av = 60 mm (single row)
- Grid = 62.5 cm
- Tie rod with 10 nails
Diameter = 4.2 mm
- Wall length = 1 m (no intermediate rib)
- Wall height = 2.75 m
- Force = 5.67 kN
The calculation is performed at the characteristic level without partial safety factors. The design is performed according to clause 188.8.131.52 of Eurocode 5. Design requirements such as the minimum thickness of sheeting, etc. are met.
Ultimate limit state staples:
Ultimate limit state of timber frame wall:
The ultimate limit state of the timber frame wall is exceeded. For the ultimate limit state, it would be sufficient to reduce the distance of the staples by half a centimeter to 5.5 cm. However, the slip mentioned in the previous articles would also have to be recalculated in this case.
Ultimate limit state anchorage:
External forces to be introduced
Fully nailed with 12 ribbed nails, the ultimate limit state is 20.5 kN > 15.6 kN according to the manufacturer's table values.
The design is thus fulfilled.
Buckling design in wall plane not necessary because timber is held by paneling.
For design with RF-TIMBER Pro, see Model 3 and Figure 03.
Compression perpendicular to the grain
In this last article of this series, the design of the timber panels is shown. You can calculate the stiffening of the building very well with the program using the analysis per story. Together with simple manual formulas, the design of wood-based panels is quick and easy.
- Model 1 of Technical Article | RFEM 5 File
- Model 2 of Technical Article | RFEM 5 File
- Model 3 of the Technical Article | RFEM 5 File
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Frequently Asked Questions (FAQ)
- How can I get the member end forces to design the connections?
- I design timber components. The deformations of load combinations deviate from the manual calculation exactly by the factor of the material partial safety factor. Why?
- How can I run the RX‑TIMBER Frame plugin? I did not find it in the Add-on Modules menu nor in Project Navigator - Data.
- I have a question about the results of the serviceability limit state design: How is the increment of the dead load by the factor 1.8 and the imposed load by 1.48 explained in the result combinations for the SLS design?
- Where can I adjust the effective length lef according to Table 6.1 of Eurocode 5 in the TIMBER Pro add-on module?
- Is it possible to display more values for the stress distribution over the layers in RF‑LAMINATE?
- How can I design dowel-laminated timber (DLT) or nail-laminated timber (NLT) in RFEM?
- I would expect the results from my load combination (CO) set to a linear analysis to equal the summation of the results from my load cases (LC) also set to a linear analysis. Why do the results not match?
- Which Dlubal Software programs can I use to calculate and design timber structures?
- How can I set the deformation coefficient kdef in the 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
Design of timber members according to the American standard ANSI/AWC NDS
Design of timber members according to the Canadian standard CSA O86-14
Design of timber members according to the Brazilian standard NBR 7190:1997
Timber design according to Eurocode 5, SIA 265 and/or DIN 1052
Design of timber members according to the South African standards SANS 10163-1:2003 and SANS 10163-2:2001