Final answer:
The slump value for rod concretes is typically less than 1 inch, indicating a stiff and less workable consistency.
Step-by-step explanation:
The slump value refers to the consistency or workability of freshly mixed concrete. It is a measure of how easily the concrete can flow and be placed. The slump value is typically measured in inches and represents the vertical drop in height of the concrete when a slump cone is removed.
In the case of rod concretes, the slump value is usually less than 1 inch. This means that the concrete is stiff and not very workable, making it suitable for applications where a thicker consistency is required, such as building structural elements like columns or beams.