What bolts should I specify with Weathering Steel?
At least here in the US, Corten steel is only manufactured in fairly heavy shapes so it would usually be used in a fairly structural application. Even bolts designed for bearing here ('snug tight') are most often high strength bolts and covered by the RCSC spec once you're dealing with steel of that size.
For structural applications (in the US), the most common bolt for weathering steel is ASTM A 325 Type 3. Type 1 is a plain steel bolt that can be corten steel fastenBest answer · 8WR grade bolts are available in the UK in 1/4 inch imperial size HSFG (when imported from America) and also in M24 TCB's, both of which are used re corten steel fasten3I assumed you'd use normal bolts, but use a nylon washer to electrically insulate the bolt from the weathering steel (in order to avoid bi-metallic corten steel fasten2Re-iterating some of above as manufacturer I can advise that Weathering Steel TCBs are generally available in M24 diameter only, with the following corten steel fasten2
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