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Tread fixings


Pocster

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Cracking on with these external stairs .

The steps etc are all steel . The tread is this stuff . They supply self drilling screws to attach it from underneath. But they don’t bite as well as I’d like . What I really want to do is fix down through the composite tread into the steel - just at the edges of each tread . So a shallow bolt head would be fine . What should I use though ??

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Edited by pocster
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25 minutes ago, Mr Punter said:

Yeah I thought about that . But if they get damaged and need to come up ….

I could just drill a hole through tread and steel then nut and bolt . But it’s a pita trying to tighten the nut when you can’t reach the bolt . No friends syndrome again ??

Edited by pocster
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Of all the things I've tried for fixing to steel, the best by far have been concrete screws. The hardened steel cuts a really good thread and the screws stick better than anything else. Probably overkill for this case tho.

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32 minutes ago, Conor said:

Of all the things I've tried for fixing to steel, the best by far have been concrete screws. The hardened steel cuts a really good thread and the screws stick better than anything else. Probably overkill for this case tho.

Really , concrete screws ? . Overkill maybe ; but if it makes a rock solid fixing I’d be happy .

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