Yes, lumber can be stored safely in a shipping container if it enters at a known moisture condition, stays off wet surfaces, receives airflow between layers where needed and is checked for condensation. Dry lumber and green or rain-wet stock need different plans. Use a moisture meter and supplier requirements rather than assuming that closed steel will keep wood stable.
Read the grade stamp, then measure the delivered wood
Decide whether the container is storing or drying
Build each stack for airflow and straight support
Condensation can rewet lumber without a roof leak
Use a storage log instead of a one-time inspection
Plan removal before the deepest bundle is loaded
Match the container to the bundles and moisture plan
Share lumber lengths, bundle weights, delivered moisture condition, storage duration and handling method so access and environmental controls can be evaluated.

