Found out structural steel tolerances in my city are way looser than I thought

Saw a spec sheet from a 1995 project that allowed a 1/4 inch gap on beam connections and now I'm wondering if modern standards are just covering for sloppy work - anyone else run into old specs that made you question everything?

3 comments

3 Comments

josephbailey19d ago

Gotta push back a little here. Those old spec sheets were written for a different world with different materials and different ways of measuring things. A 1/4 inch gap on a beam connection in 1995 might have been totally fine if they factored in thermal expansion and the kind of steel they were using back then. Modern standards are tighter for sure, but they're also based on a lot more computer modeling and actual load testing. I've seen some old buildings that are still standing just fine after 40 years with those "loose" tolerances. Maybe they knew what they were doing even if it looks sketchy on paper now. The bigger problem is probably new construction using those old specs without understanding why they worked in the first place.

olivia67019d ago

OH MAN the "1/4 inch gap" thing got me. I saw a blueprint from 1988 for a parking garage near me that literally said "welds can have up to 1/2 inch mismatch on flanges" and I was like wait what?? Like that's not even a weld at that point, that's just a suggestion. Makes me wonder if these old buildings are just held together by hope and good vibes. I've been checking specs on older projects in my area too and it's wild how much they got away with.

pat_roberts5519d ago

Ngl @olivia670, that "just a suggestion" part hits hard. Half inch mismatch is basically saying "close enough" in a parking garage where beams hold up cars. Honestly scary stuff.