Timber or objects and structures made of it.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "timbering" in a sentence
"Bolt support can be an alternative to timbering which is what is commonly used in the developing countries."
"Now Peveril learned for the first time what "timbering" a mine meant, and realized the necessity for the huge piles of great logs that he had seen above ground in close proximity to the shaft."
"They weren't paid for "dead work," which was work that was not seen as mining for coal, such as timbering supports to keep the mine safe."