Tail beams

Tail beam- A relatively short beam or joist supported in a wall on one end and by a header at the other. 

At the initial pick point, when the vessel is still horizontal, the load is shared between the lifting lugs and the tail beam or lug, based on their respective distances to the vessel c enter of gravity. As the lift proceeds, a greater percentage of the load is shifted to the top lugs or trunnions until the vessel is vertical and all of the load is then on the top lugs. At this point the tail beam or shackle can be removed. 

There are situations and conditions that could make the use of a tailing choker impractical, costly, and possibly unsafe. Provide tailing lugs or a tailing beam if ... 

Nb = number of bolts used in tail beam or flange lug N = width of flange of tail beam with a web stiffener (N = 1.0 without web stiffener) nL = number of head or side lugs P =pick end load, lb Pe = equivalent load, lb Pl = longitudinal load per lug, lb Pr = radial load, lb Pt = transverse load per lug, lb Rb = radius of base ring to neutral axis, in. 

DESIGN OF TAIL BEAMS, LUGS, AND BASE RING DETAILS... 

Skirt Crippling Criteria with Tailing Beam... 

Skirt/Tail Beam Calculations Tail Beam... 

Values of Moment Coefficient, K, for Base Ring With Two Parallel Tail Beams... 

A tailing lug, as opposed to a tailing beam, allows the load to be disconnected from the vessel without a person s getting under a suspended load to unhook. 

Procedure 10-5 Design of Tail Beams, Lugs, and Base Ring Details... 

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