When using tiedowns for securing cargo, what is the general rule regarding cargo length.

A 1 tiedown for every 10 ft, or part thereof.

explanation

When cargo is prevented from forward movement (for example, by the headboard, bulkhead, other cargo, or tiedown), secure the cargo according to the following requirements:
All Cargo:
1 tiedown for every 10 ft, or part thereof.