This is a highly complex problem. One reason to run below capacity is that many of the trees that have grown in the souther US were left standing to grow longer

This is a highly complex problem. One reason to run below capacity is that many of the trees that have grown in the souther US were left standing to grow longer during persuades of low demand in the last decade. Now that there is high demand it has become apparent that not many sawmills in the south of the UD have the capacity to saw larger trees, and many of the bigger mills that can are in Canada which is being impacted by tariffs that make shipping them back and forth not so economic.