Canfor Corp. is bearing the brunt as new tariffs on softwood lumber exports into the United States come into effect.  Starting this week, the penalty will be 19.54% – more than quadruple the 4.62% it had been paying.  It's of little solace the U.S. Commerce Department had been considering a slightly higher 21% in May when preliminary tariffs were announced.  Combined, Canadian lumber producers will be paying 17.9% – slightly below the 18.32% preliminary rate issued in May, but double the initial 8.99% rate.  "We are very ...