Georgia-Pacific and Chesapeake Corp, subsidiary Wisconsin tissue signed a letter of intent to combine their away-from-home tissue businesses in a new partnership controlled by G-P that would more than double its presence in that segment of the tissue market. The move combining the fourth and fifth largest US tissue producers would make G-P third-largest in US commercial and industrial tissue. It would also give G-P a new presence in the Mexican market where Wisconsin tissue has four facilities from two purchases it made in 1996.