Page 296 - Ship Construction.DJ Eyres 6Ed
P. 296
Ch24-H8070.fm Page 285 Wednesday, October 18, 2006 7:00 AM
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Loads vary in runners included angle at 120° unless boom heads are 90°
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
Note: level. 120° 2 Tonnes
load
runner 1.8 Tonnes
2.1 Tonnes
Outboard Inboard runner load ึ Outboard boom Forces in cargo runners of union purchase rig
120°
30° limiting heights (runners at 120° at any point of curve) Limiting height FIGURE 24.5
Curve of
Inboard boom
+
