Single tapered beams

Cross-sectional Inputs

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

This a beam of a rectangular cross-section whose height changes along its axis at a constant angle (single tapered), under bending about the y-y axis, taking into account the effect of local stresses at the outermost fibre of the tapered edge, according to Clause 6.4.2.

Timber Type

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

Width b

The width of the cross-section, in mm.

Depth h

The depth of the cross-section, in mm.

Angle α

The angle of the taper, in degrees.


Section modulus reduction

The section modulus reduction ΔW refers to reductions in the nominal cross-sectional modulus that are 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 section modulus of the cross-section.


Contribution of cross-section size on the determination of member strength properties

Includes factors kh for the calculation of the member strength in solid timber, glulam and LVL, according to Clauses 3.2, 3.3, and 3.4.

In the case of an LVL member under tension, the member length is also required.

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.