UFC 4-159-03
3 October 2005
Table 5-4. Drag Anchor Holding Parameters SI Units
SOFT SOILS
HARD SOILS
Anchor Type (a )
(Soft clays and silts)
(Sands and stiff clays)
HR
HR
b
b
(kN)
(kN)
Boss
934
0.94
1201
0.94
BRUCE Cast
142
0.92
1112
0.8
BRUCE Flat Fluke Tw in Shank
1112
0.92
(c)
(c)
BRUCE Tw in Shank
841
0.92
934
0.94
Danf ort h
387
0.92
560
0.8
Flipper Delta
618
0.92
(c)
(c)
G.S. AC-14
387
0.92
560
0.8
Hook
841
0.92
445
0.8
LWT (Lightw eight )
387
0.92
560
0.8
Moorf ast
520
0.92 (i)
267
0.8
445
(d)
0.8
NAVMOOR
934
0.94
1201
0.94
Of f drill II
520
0.92 (i)
267
0.8
445
(d)
0.8
STATO
934
0.94
1112
(e)
0.94
845
(f )
0.94
STEVDIG
618
0.92
1290
0.8
STEVFIX
841
0.92
1290
0.8
STEVIN
618
0.92
734
0.8
STEVMUD
1112
0.92
(g)
(g)
STEVPRIS (straight shank)
841
0.92
934
0.94
St ockless (fixed fluke)
205
0.92
311
0.8
196
(h)
0.8
St ockless (movable fluke)
107
0.92
311
0.8
196
(h)
0.8
(a)
Fluke angles set for 50 deg in soft soils and according to manufacturer' s specifications
in hard soils, except w hen otherw ise noted.
(b)
" b" is an exponent constant.
(c)
No data available.
(d)
For 28-deg fluke angle.
(e)
For 30-deg fluke angle.
(f)
For dense sand conditions (near shore).
(g)
Anchor not used in this seafloor condition.
(h)
For 48-deg fluke angle.
(i)
For 20-deg fluke angle (from API 2SK effective March 1, 1997).
107
Previous Page
