Design of Outfit Elements in Ships for Fatigue Technical ... - EWF

Comments
Description of Type of connection Detail
category
∆σR Equipment Detail Sketch of connection with
fatigue crack and stress
considered σ
For t2 ≤ 0.7 ⋅ t1 ∆σR can be upgraded by
one category.
Stiffener welded to a plate in loading direction
R > 300 mm 56
Assessment of the opening edges by
means of a direct determination of the
notch factor only
4.3 Small hatches
Assessment of weld at transition
from deck to coaming in a hatch
corner
For t2 ≤ 0.7 ⋅ t1 ∆σR can be upgraded by
one category.
71
63
56
Stiffener welded to a plate in loading direction
R ≤ 150 mm
150 mm < R ≤ 300 mm
R > 300 mm
4.4 Container foundations
Assessment of girder end parallel to
main loading direction
∆σR may be upgraded by one category:
– reinforced end weld
– weld angle ≤ 30°
– connection length ≤ 150 mm
End of a long doubler at the flange of a girder
tD ≤ 0.8 t
56
50
45
0.8 t < tD ≤ 1.5 t
tD > 1.5 t
5.1 Hatch cover bearings (pads)
Assessment with regard to loading
of ship structure
Load-carrying fillet weld Assessment in individual cases by means
of hot-spot concept with ∆σSR = 90
5.2 Hatch cover bearings (pads)
Assessment with regard to
container loads
Page 7 of DVS 3501