A 20-foot container is often the first size worth testing for tool storage, but it is only a planning hypothesis. The right size is the smallest measured layout that gives every tool a stable home, preserves a usable aisle and keeps battery charging or repair work within properly designed boundaries. Several crews, long items or bulky carts may justify 40 feet or a second access point.
Turn the inventory into storage positions
Test the 20-foot hypothesis on a scaled plan
A workday exposes capacity problems better than a volume calculation
Decide whether the space is a locker or an occupied workroom
Battery storage and charging need evidence for the exact system
Use zones only where they shorten the retrieval path
Moisture enters with the work
Approve the bay map, then audit it after a busy month
Match the container to the bay map and crew flow
Share the inventory, gang boxes, long items, cart size, crew pattern and whether charging is proposed so the size discussion starts with real operations.

