Tailing lugs

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 ... 

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. 

Base with Internal Base Stiffeners and Dual Tailing Lugs... 

When a stack or vessel is lifted, various loads are imposed on the lift devices (lifting lug, tail lug, or trunnions) over the various values of the lift angle, 9. To assess these stresses, Chapter H ( Combined Stresses ) of the AISC Manual [3] combines axial tension and bending, illustrated in paragraph H2 in Equation H2-1, as follows ... 

The tailing lug or lugs are handled in a similar method. The parameter with the tail lug is A1SCRT0, which is defined as follows ... 

The parameters in Eq. 7.45 and Eq. 7.46, Abring and Ztailug, are computed for the ring block cross-section of the location where the tail lug is welded onto the base plate, compression ring, and skirt area shown in Figure 7.14. Figure 7.14 shows a spreadsheet solution for the tail lug ring block assem-... 

X = distance from tail lug hole center to lug edge, nun y = radial distance from tail lug hole center to centerline of skirt, mm... 

Another parameter used in the assessment of lifting and tail lugs is the equivalent stress proposed by Hicks [6], which combines the shear stress with the tensile and bending stress as follows ... 

Wtailug = width of tail lug, mm DHtail = diameter of hole in tail lug, mm tlug = thickness of tail lug, mm... 

RB mm Outside radius of skirt center line to tail lug hole center... 

L TL9 674570.724 Kg Vertical lift load component at each tail lug varies with e... 

MbTe 694629.085 MPa Bending stress in the tail lugs - varies with 9, N-mm... 

L obTG 57.8857571 Bending stress in tail lugs - varies with lift angle 9... 

L AISCRTe. 553220588 AISC Ratio for tail lugs - see plot for values... 

ALUG 39750 Shear area of each of two tail lugs, sq mm... 

FIGURE 7.22 The actual lifting of the hydrocracker using the top flange lug and tail lugs. 

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