Vertical Vessel Lug Supports
The main design consideration regarding lug-supported vessels is the stress magnitude in the shell. Bijlaard’s method, as covered in WRC 107, is usually followed for the design. This method consists of determining the stress in the shell at the vicinity of a support lug of height 2C2 and width 2C1, as shown in Figure 400-20. These designs should also be left to qualified specialists.
The bending moment in the shell due to support eccentricity is given by:
Mo = F×e
(Eq. 400-36)
and the maximum stress in the shell is calculated from WRC 107. Both membrane and bending stresses are considered. Details of the calculations are well established in WRC 107.
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