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Testing our metal

  • Comment

With regards to Metalworks, pages 6 and 7 (AJ 25.9.03), presumably the structural steel deck is not, as shown, continuous from external overhang to internal roof.

If the regulations permit such continuity, then breaking a steel beam is clearly a nonsense!

SH Mawer, Curtins Consulting Engineers, Cumbria

John Winter replies: The metal deck is indeed continuous from inside to outside. But it is very thin, 0.8mm, and for at least 100mm passes through insulation on both sides. I accept that this is a cold bridge, but it was considered that, in view of the thinness of the steel, heat transference would be minimal. The roof beams, on the other hand, are heavy sections and, had they been continuous, heat loss would have been unacceptable.

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