Definition of structural lumber
: lumber that is intended for use where working stresses are required and that is two or more inches thick and four or more inches wide
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up structural lumber? Please tell us where you read or heard it (including the quote, if possible).