I also spoke to some manufacturers, and was told the change in manufacturing took effect in 2010, so I fear that's not the answer. Research indicates that requiring "tempering" is not enough. It needs to be tempered to Class I standard, i.e. oil-tempered, not just heat tempered. I wasn't told...
Thanks Mike, this is all great info. So you decided on catwalks over the stage in lieu of fly tower, or do you mean one of the FOH catwalks? And you also have a back of the stage location? A "garage" in the rear wall, or.....? We did the garage concept once but it needed ventilation, as it...
Thanks for all who contributed to this thread; I'm on a design team debating the same decision and this is great information, particularly the fact that this discussion is out there and so many of you working in relevant facilities have contributed.