Wednesday, February 2, 2011

Upside down beams (Repeated)

... here in USA the glulam (and other engineered wood products) industry has evolved into using what I call `highly optimized’ beams. We get every `psi’ out of our wood as possible ... and we arrange the wood (in our layups) as efficiently and economically as possible. It’s good – but sometimes backfires, e.g. when an unbalanced beam gets installed upside down. Generally when an unbalanced beam gets installed upside down you either install it right-side up, or call an engineer. When the beam has been installed upside down, and construction continued, the re-install option is practically gone, so the `call an engineer’ is probably the way to go. The engineer may find that there was excess capacity in the beam to begin with – yay! (But then to deal with if the beam is/was cambered.) If the beam is inadequate upside down – then it will need to be reinforced (or replaced). Reinforcement is another conversation.

Blurb on upside down beam investigation:


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