Canadian lumber standard white wood timber is commonly known as CLS timber. CLS timber is available in a number of grades, but the most common is C16 grade. Usually sourced from spruce or Nordic wood, it offers high strength with a low fire risk.
CLS timber is mostly used for indoor work on stud and partition walls. It is ideal when putting up additional non-load bearing stud walls as it is easy to handle due to its rounded planed edges. CLS timber is kiln dried to prevent warping.