Define the term "splice" in the context of structural steel.

In the context of structural steel, the term "splice" specifically refers to a connection that joins two pieces of steel together end-to-end. Splices are critical in structural applications to extend the length of steel sections, allowing for the continuity and integrity of the structure. This method is essential when dealing with long spans where a single piece of steel may not be feasible due to transportation limitations or material availability. Proper design and execution of splices are crucial for maintaining the structural load-carrying capacity and stability of the overall construction.

Other options do not accurately capture the definition of a splice. Coating methods, while important for protection against corrosion, are not involved in the structural connection of the steel itself. A joint that allows movement between steel sections refers to expansion joints or similar connections, which serve a different purpose than a splice. Aesthetic design features may enhance the visual appeal of a structure but are not related to the functional connections of steel members.