Figure 1-5. Clamshell working ranges.
Table 1-2. Cable Lengths, Diameter, and Use
For
Boom length
Cable type and size
Main guy cable
Intermediate
Drag
Clam
Crane
Pile
guy cable
line
shell
driver
Ft.
In.
In.
Ft In.
In.
Ft In.
In.
Ft In.
Boom ...........................
50
0
No.
4
x 290-0
.......................... ................................ ............... X ............. X..............X ................
Hoist ............................
50
0
No.
4
x 190-0
.....2-1 x 28-0 ................................ ............... X ............. X..............X ................
55
0
No.
4
x 310-0
.......................... ................................ ............... X ............. X..............X ................
55
0
No.
4
x 180-0
......2-1 x 33-0 ................................ ............... X ............. X..............X ................
60
0
No.
4
x 390-0
.......................... .............2- x 20-0 ............... X ............. X..............X ................
60
0
No.
4
x 240-0
......2-1 x 38-0 .............2- x 20-0 ............... X ............. X..............X ............. X
65
0
No.
4
x 420-0
.......................... .............2- x 20-0 ............... X ............. X..............X ................
65
0
No.
4
x 240-0
.....2-1 x 43-0 .............2- x 20-0 ............... X ............. X..............X ................
70
0
No.
4
x 450-0
.......................... .............2- x 20-0 ............... X ............. X..............X ................
70
0
No.
4
x 240-0
.....2-1 x 48-0 .............2- x 20-0 ............... X ............. X..............X ................
75
0
No.
4
x 460-0
.......................... .............2- x 20-0 ............... X ............. X..............X ................
75
0
No.
4
x 240-0
.....2-1 x 53-0 .............2- x 20-0 ............... X ............. X..............X ................
80
0
No.
4
x 470-0
.......................... .............2- x 28-0 ............... X ............. X..............X ................
80
0
No.
4
x 240-0
.....2-1 x 58-0 .............2- x 28-0 .................. ............... ..............X ................
85
0
No.
4
x 240-0
.....2-1 x 63-0 .............2- x 28-0 .................. ............... ..............X ................
90
0
No.
4
x 240-0
.....2-1 x 68-0 .............2- x 28-0 .................. ............... ................ ............. X
95
0
No.
4
x 240-0
.....2-1 x 73-0 .............2- x 33-0 .................. ............... ..............X ................
100
0
No.
4
x 240-0
.....2-1 x 78-0 .............2- x 38-0 .................. ............... ..............X ................
Hoist ............................
50
0
No.
4
7/8 x 130-0
.......................... ................................ ............... X ............... ................ ................
50
0
No.
4
1 x 175-0
.......................... ................................ .................. ............... ............ X* ................
55
0
No.
4
7/8 x 140-0
.......................... ................................ ............... X ............... ................ ................
55
0
No.
4
1 x 190-0
.......................... ................................ .................. ............... ............ X* ................
60
0
No.
4
7/8 x 150-0
.......................... ................................ ............... X ............... ................ ................
60
0
No.
4
1 x 205-0
.......................... ................................ .................. ............... ............ X* ................
Hoist ............................
65
0
No.
4
7/8 x 160-0
.......................... ................................ ............... X ............... ................ ................
65
0
No.
4
1 x 220-0
.......................... ................................ .................. ............... ............ X* ................
70
0
No.
4
7/8 x 170-0
.......................... ................................ ............... X ............... ................ ................
70
0
No.
4
1 x 235-0
.......................... ................................ .................. ............... ............ X* ................
75
0
No.
4
7/8 x 180-0
.......................... ................................ ............... X ............... ................ ................
75
0
No.
4
1 x 250-0
.......................... ................................ .................. ............... ............ X* ................
*See footnotes at end of table.
1-9
