length of the long side of a rectangular plate, m (in)
pitch or distance between stays, m (in)
major axis of elliptical plate, m (in)
long span of noncircular heads or covers measured
at perpendicular distance to short span, m (in) (see Fig. 8-10)

Figure 8-10: Coefficient k ₆ for noncircular flat heads.

factor determined from Fig. 8-3

total cross-sectional area of reinforcement required in the plane under consideration, m ² (in ²) (see Fig. 8-17) (includes consideration of nozzle area through shell for ? _sna/ ? _sva < 1.0)

outside diameter of flange or, where slotted holes extend to the outside of the flange, the diameter to the bottom of the slots, m (in)

area in excess thickness in the vessel wall availabel for reinforcement, m ² (in ²) (see Fig. 8-17) (includes consideration of nozzle area through shell if ? _sna/ ? _sva < 1.0)

area in excess thickness in the nozzle wall availabel for reinforcement, m ² (in ²) (see Fig. 8-17)

area availabel for reinforcement when the nozzle extends inside the vessel wall, m ² (in ²) (see Fig. 8-17)

cross-sectional area of various welds availabel for reinforcement (see Fig. 8-17), m ² (in ²)