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[quote=Anonymous][quote=Anonymous][quote=Anonymous]"The beam didn't turn to brisket because of poor framing; bulk water infiltration caused by shoddy exterior flashing and finish work did that (and sometimes poor design exacerbates it)."

Following this line of thought, the beam didn't rot because it wasn't strong enough, or because the material it was built from was weak or the wrong choice, or because it was undersized. By all accounts it was installed properly. There was nothing wrong with the beam. [/quote]

A steel beam will rust in that situation, but it would take many decades to lose its structural integrity, rather than a few years with a wood beam. [/quote]

There is nothing inherently better with steel than LVLs. They each have their place and each have their drawbacks (steel costs a lot more!). Neither will perform longterm if the exterior cladding is improper. Right now at a local DC university, there is an expensive project going on to replace a steel column and beam connection for a walkway because the water management was done poorly and for 20 years water was infiltrating and the steel column (holding a pedestrian walkway!) disintegrated. It lasted longer than wood, but also not of infinite duration. LVLs have a lot of advantages for residential construction (strength to weight, stability in seasonal changes, site assembly without major equipment, etc). [/quote]

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