Make use of the wooden floor and nail wood to it. Be mindful that there is a receiving end as well, so try to secure the cargo in such a way that it is relatively easy to remove the lashing/dunnage at the point of destination.
If you are using wood packaging materials, you should look for ISPM regulations in your destination country before packing. Contact related officials (customs or customs broker, for example) in advance. You can discuss it with your destination country consulate. Most of the time, a fumigation certificate should be sufficient.
Different countries in the world have different levels of restrictions. Types and forms of such documents may vary from country to country. So please check the country's regulations prior to stuffing your cargo.
It is helpful in the process to have a workflow that explicitly documents taking a picture of fumigation stamps on the blocking wood. That does not only document the material condition, but may even prevent shipping containers with the wrong wood used.
This has been a brief outline to assist in the process of loading your cargo. If you have any doubts about the best practices for packing your container, I would strongly recommend you use a professional packing company to ensure that your cargo reaches its destination safely.
Learn more about securing your cargo and creating a successful quality control process.