UFC 4-159-03
3 October 2005
Table 5-3. Drag Anchor Holding Parameters U.S. Customary
SOFT SOILS
HARD SOILS
Anchor Type (a )
(Soft clays and silts)
(Sands and stiff clays)
HR
HR
b
b
(kips)
(kips)
Boss
210
0.94
270
0.94
BRUCE Cast
32
0.92
250
0.8
BRUCE Flat Fluke Tw in Shank
250
0.92
(c)
(c)
BRUCE Tw in Shank
189
0.92
210
0.94
Danf ort h
87
0.92
126
0.8
Flipper Delta
139
0.92
(c)
(c)
G.S. AC-14
87
0.92
126
0.8
Hook
189
0.92
100
0.8
LWT (Lightw eight )
87
0.92
126
0.8
Moorf ast
117
0.92 (i)
60
0.8
100
(d)
0.8
NAVMOOR
210
0.94
270
0.94
Of f drill II
117
0.92 (i)
60
0.8
100
(d)
0.8
STATO
210
0.94
250
(e)
0.94
190
(f )
0.94
STEVDIG
139
0.92
290
0.8
STEVFIX
189
0.92
290
0.8
STEVIN
139
0.92
165
0.8
STEVMUD
250
0.92
(g)
(g)
STEVPRIS (straight shank)
189
0.92
210
0.94
St ockless (fixed fluke)
46
0.92
70
0.8
44
(h)
0.8
St ockless (movable fluke)
24
0.92
70
0.8
44
(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).
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