Beams with a notch at the support

Cross-sectional Inputs

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

This a beam of a rectangular cross-section with a notch at the support, under a shear force, taking into account the effect of the notch, according to Clause 6.5.2.

Timber Type

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

Notch

The position of the notch (on the same or the opposite side of the support) is taken into account in the design.

Width b

The width of the cross-section, in mm.

Depth h

The standard depth of the cross-section, in mm.

Depth h_ef

The depth of the cross-section of the beam on the support, in mm.

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Distance x

The distance between the centre of axis of the support and the start of the notch, in mm.

It is required only when the notch is on the side of the support.

Angle θ

The angle of the notch, in degrees.

It is required only when the notch is on the side of the support.

Factor k_n

The factor k_n is required for plywood, as the relevant standards do not provide a value.

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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.

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Contribution of the load distribution system in the member strength properties

Includes factor k_sys 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.