Here’s an idea of the steel form for the parasol roof. At this stage the main structure consists of 90x90mm mild steel sections and the smaller members are 20x40mm sections. Since their performance in tension is our main concern re wind loads etc, I don’t think makes a significant difference whether the long section run horizontal and vertical? Will need to check this, as well as checking the typical cross-sectional areas used…
Also, the longest span is 3m. Not sure if this means we need larger purlins to cover it? I would much rather use the smallest sections possible, and just have more them. I wonder if timber purlins are an option? Not sure about the aesthetics of cold formed section?
2 comments:
looks great. keep to small sections if possible.
i think stick to steel. I can't wrap my head around combination of timber purlins on steelrafters..
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