Awesome info boys thanks for that! we have some 20mm 300x300 mild steel cleats that attach the steel beams to concrete spandrels kicking around site that i was hoping to use as they are going to get binned (wrong size etc) I'll ask the steelys for some wear plate now. I like the 10mm over vert for bullet splatter idea! Also @Gibo I don't know how I missed that thread when searching, my bad ill have a good read now cheers
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