Cruciform joint

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A cruciform joint is a specific joint in which 4 spaces are created by the welding of 3 plates of metal at right angles. In the American Bureau of Shipping Rules for Steel Vessels, cruciform joints may be considered a double barrier if the two substances requiring a double barrier are in opposite corners diagonally. Double barriers are often required to separate oil and seawater, chemicals and potable water, etc.

[edit] References

• ABS Rules For Steel Vessels Part 5C - Specific Vessel Types