Originally posted by dom9
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When you get into cantilever territory, you open up a whole other world of costs. The engineering involved on its own can blow out budgets. The non standard sizes involved will also blow out the budget. Whereas a truss is about as simple as it gets structurally.

From my experience as a budding architect, the simpler and more minimal you design something, the more expensive it is to build. Theres a reason manufacturers make things in standard sizes. As soon as you go out of these standards, be it steel, timber, glass etc you start to see costs spiral out of control. Its a shame that the industry is so standardised like this, as it really limits the creativity at times.
I just had the costs of a really beautiful, slender flat roof for a house I've designed come back and they're astronomical. It looks so simple on paper. A 380UB border, flat deck roof sheeting, laid on timber purlins at 1.5degrees and a massive box gutter in the middle. Its about quadruple the cost of a standard roof truss system that uses 5 times the materials.






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