Sorted now guys....went the eBay route.
What's the best way to bolt them all together.
Was thinking stainless screwed bar cut to length. Welded nut on 1 end and nylon nut and washer on other end. Timber connectors between joist
Staggered top and bottom. But I'd still have gone with the 200x50's, and then only needed 2 joists. Less cost and hassle all round, and you've only lost 2 inches on the ceiling height.
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