11
2 X
2 X
±
90°
Make sure that each extremity (front and back) ends at a ±90° angle.
Les 2 embranchements verticaux (avant et arrière) doivent former un angle de ±90° avec la poutre horizontale
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AB
F
F
J
J
AB
J
r
H
2 X
2 X
2 X
r
6 X
H
[ [ 8''- 10''] ]
±
90°
J
15
.