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4. STRUCTURAL DESIGN OF LVL STRUCTURES
Figure 4.9. Connection between a cord and diagonal strut or secondary beams connected to the lower part of a main beam create tension
stresses perpendicular to the grain. When the cord member is LVL-C and the connection is on the face side, equation 8.4 of EN1995-1-1 is not
applied, since LVL-C is not sensitive to splitting (Modified from EC5 figure 8.1).
for their standards classes are not defined directly from testing
according to EN 408.
In addition to the compression resistance itself, usually the
stability design (buckling) of the members is more critical, see
subsection 4.3.9.
4.3.6 Compression perpendicular
to the grain
Compression perpendicular to the grain design is defined in
EN1995-1-1, Clause 6.1.5. The following expression shall be
satisfied:
σ_(c,90,d)≤k_(c,90)∙f_(c,90,d) (4.13) (EC5 6.3)
with
σ_(c,90,d)=F_(c,90,d)/A_ef (4.14) (EC5 6.4)
Where
σc,90,d is the design compressive stress in the contact area
perpendicular to the grain;
Fc,90,d is the design compressive load perpendicular to
the grain;
Aef is the effective contact area in compression
perpendicular to the grain;
fc,90,d is the design compressive strength perpendicular to
the grain; and
kc,90 is a factor taking into account the load configuration,
the possibility of splitting, and the degree of
compressive deformation.
Figure 4.10. Compression parallel to grain of surface veneers.
Figure 4.11. Compression perpendicular to the grain of surface
veneers.
,0, = c,0,d ≤ c,0,d (4.12)
c,90,d ≤ c,90 ∙ c,90,d (4.13) (EC5 6.3) with
c,90,d = c,90,d ef (4.14) (EC5 6.4)
,0, = c,0,d ≤ c,0,d (4.12)
c,90,d ≤ ,90 ∙ c,90,d (4.13) (EC5 6.3) with
c,90,d = c,90,d ef (4.14) (EC5 6.4)
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