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Timber to Timber characteristic capacities

Art. nr. Product characteristic capacities - Timber to Timber C24
Axial resistance Shear resistance parallel to the grain depending of t1 [Rv.0.k] [kN] Shear resistance perpendicular to the grain depending of t1 [Rv.90.k] [kN]
t1 [mm] Rax.k [kN] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm] 35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] ≥100 [mm]
SDW22300-R50E 40 3.41 3.32 3.36 3.14 - - - - 2.64 2.64 2.59 - - - -
SDW22338-R50E 46 3.79 3.41 3.62 3.62 - - - - 2.79 2.94 2.97 - - - -
SDW22458-R50E 82 3.41 3.32 3.52 3.52 3.52 3.52 3.46 - 2.7 2.84 3 3.08 2.94 2.78 -
SDW22500-R50E 87 3.79 3.41 3.62 3.62 3.62 3.62 3.62 - 2.79 2.94 3.1 3.17 3.17 3.16 -
SDW22638-R50E 126 3.41 3.32 3.52 3.52 3.52 3.52 3.52 3.52 2.7 2.84 3 3.08 3.08 3.08 3.08
SDW22634-R50E 131 3.79 3.41 3.62 3.62 3.62 3.62 3.62 3.62 2.79 2.94 3.1 3.17 3.17 3.17 3.17

These capacities are valid for:

  • Timber element under the head with thickness ≤ t1 disclosed in adjacent column
  • Screw axis between 45° and 90° from timber grain for ESCR(XXX), and 90° from timber grain for all other screws.

For tightening screws (partially threaded), t1 dimension is the maximum thickness of the under-head timber member for which the thread is fully in the pointside timber member, for an optimum installation and tightening.

The shear capacities are given for several timber thicknesses t1 of the under-head member under the following configurations:

  • Load axis at 0° from both timber grains Rv.0°.k
  • Load axis at 90° from both timber grains Rv.90°.k

These capacities are valid for C24 timber grades or higher
The pre-drilled hypothesis for capacity and distances calculation is fulfilled.
For partial threaded screws, capacities are only given for configurations where the thread is less than 5mm in under-head timber member, in order to achieve optimum installation and tightening.
Clause (2) in 8.3.1.2 from EN1995-1-1:2004+A2:2014 about embedment length is ignored in these calculations.

Steel to Timber characteristic capacities

Art. nr. Product characteristic capacities - Steel to Timber C24
Axial resistance [Rax.st.k] [kN] Shear resistance - Thin plate Shear Resistance - Thick steel
Rv.0.st.k [kN] Rv.90.st.k [kN] Rv.0.st.k [kN] Rv.90.st.k [kN]
SDW22300-R50E 3.41 3.52 3.08 4.63 4
SDW22338-R50E 3.79 3.62 3.17 4.72 4.09
SDW22458-R50E 3.41 3.52 3.08 4.63 4
SDW22500-R50E 3.79 3.62 3.17 4.72 4.09
SDW22638-R50E 3.41 3.52 3.08 4.63 4
SDW22634-R50E 3.79 3.62 3.17 4.72 4.09

Shear capacities are given for thick (tst = d) and thin (tst = 0,5xd) steel plates under the following configurations:

  • Load axis at 0° from timber grain Rv.0°.k
  • Load axis at 90° from timber grain Rv.90°.k

These capacities are valid for C24 timber grades or higher.
For intermediate steel thicknesses, capacities shall be calculated by linear interpolation between the limiting thin and thick plate values.
The pre-drilled hypothesis for capacity and distances calculation is fulfilled.

Ledger on Stud characterisitic capacities

Art. nr. Product characteristic capacities - Ledger on stud C24
Minimum width of the stud [mm] Minimum distance to the bottom side of the ledger a4,c [mm] Shear capacity depending of thickness of ledger t1 [Rv.90-0.k] [kN]
35 [mm] 40 [mm] 45 [mm] 60 [mm] 75 [mm] 80 [mm] 90 [mm] ≥100 [mm]
SDW22300-R50E 46 23 3.27 3.19 2.86 - - - - -
SDW22338-R50E 46 23 3.36 3.36 3.36 - - - - -
SDW22458-R50E 46 23 3.27 3.27 3.27 3.27 3.27 3.27 - -
SDW22500-R50E 46 23 3.36 3.36 3.36 3.36 3.36 3.36 3.25 -
SDW22638-R50E 46 23 3.27 3.27 3.27 3.27 3.27 3.27 3.27 3.27
SDW22634-R50E 46 23 3.36 3.36 3.36 3.36 3.36 3.36 3.36 3.36