ABSTRACT
C.6.1.1.1. To measure joint strength parallel to the grain test specimens shall be made either as:
(a) 3-member joints according to figure 1 for single shear action of the staples; (b) symmetrical 4-memberdoublejointspecimensaccording to figure 2 for single
shear action of the staples. C.6.1.1.2. The penetration length into the central member shall be chosen so that
the yield point of the leg will be reached at or before the maximum load occurs. N.B.: This penetration length can be estimated as:
where: sy=yield strength of the staple material and s s=embedding strength of the wood. C.6.1.1.3. The thickness tc of the central member must be chosen such that:
C.6.1.1.4. The thickness ts of the side members, the mutual staple distances s// and
as well as the end and edge distances shall be chosen so, that the embedding strength of the timber rather than e.g. its shear strength determines the maximum load.
