Compression perpendicular to the grain

Cross-sectional Inputs

All references to EN 1995-1-1:2004 unless otherwise stated.

This tests a cross-section in compression perpendicular to the grain according to Clause 6.1.5.

Timber type

The timber type of the cross-section. See the timber database section for the types supported by Teretron.


Cross-section type

The geometry type of the cross-section.

Width b

The width of a rectangular cross-section, in mm.

Depth h

The depth of a rectangular cross-section, in mm.

Length lv

The distribution length of the compressive force, in mm.

Area A

The area of effect of the compressive force, in mm2.


Area reduction

The area reduction ΔA refers to reductions in the nominal cross-section size that have to be taken into account in the calculation of the member strength (e.g. holes from fasteners) according to Subclause 5.2(2).

It should be given as a percentage of the total nominal area of the cross-section.




The EN 1995-1-1 state that the compressive strength can be multiplied by a factor kc,90 for rectangular cross-sections of solid or glulam softwood, with l1 ≥ 2h.

The value of kc,90 should be taken between 1.0 and 1.75 and its precise value depends on the support conditions and the timber type.

Member on continuous supports

For a beam resting on continuous supports, as per Figure 6.2(a).

Member on discrete supports

For a beam on discrete supports, as per Figure 6.2(b).

Other

For members not covered by the two cases above.


Distance to the edge α

The distance to the end of the member α, in mm. It is applicable only for a member in continuous or discrete supports, as per Figure 6.2.

Distance between compressive force l1

The distance to the end of the member l1, in mm. It is applicable only for a member in continuous or discrete supports, as per Figure 6.2.




Contribution of the load distribution system in the member strength properties

Includes factor ksys for the calculation of the member strength, according to Clause 6.6, for a member that functions as part of a continuous load distribution system.

Note that Subclause 6.6(3) states that the strength verification for a continuous load distribution system should be carried out assuming short-term load duration.