# What is the meaning of Note 40162 concerning the shear strengths of the Binderholz company?

In the case of the structures by the manufacturer Binderholz, the shear strengths are calculated according to the following equation as soon as the slabs are defined without glue at narrow sides and the design of shear failure is calculated in the wall plane.

$f_{v,k}=\left\{\begin{array}{l}\begin{array}{c}3.5\\8.0\frac{D_{net}}D\\\end{array}\\2.5\frac{(n-1)(a²+b²)}{6Db}\end{array}\right.$

where
D is the element thickness,
Dnet is the sum of the longitudinal and transverse layer thicknesses in the element,
n is the number of board layers,
a = b is the width of the boards in the longitudinal or transverse layers.

All values are in N/mm². For more detailed information, check the manufacturer's approval.