Cen wrote:I'm not a structural engineer, but Is that steelwork still safe? It's been exposed to coastal weather and air with no protection at all. There's clearly some rusting going on too. Surely they'll have to do some maintenance work...
All structural steelwork that's exposed to the elements in the permanent case is typically galvanised. All structural steelwork that becomes internal (i.e. covered by architectural finishes) is covered with some sort of paint, either for corrosion or fire protection (or both).
Coastal situations are tricky and a colleague of mine was recently involved in a dispute regarding paint specifications. In his case the steelwork had corroded because the contractor had left the structural frame exposed much longer than anticipated at the design stage. Consequently, the paint specification that was originally specified (based primiarily on internal conditions) was found inadequate as it was never intended to provide protection to steel that would be exposesd for several months.
Similar situation arise with concrete frames as well, as the protection to the reinforcement is dependent upon the cover of concrete to the bars. Again, this is usually specified assuming miminal exposure during construction.
I would suspect that this building has suffered much more corrosion that you would expect and the paint work is probably wrecked and no longer fit for purpose. The other difficulty now, is that I doubt the engineer who designed this building would warrant the design given what has happened with the construction stopping for this length of time.