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I'm curious on the history of this. AISC says all holes shall be 1/16" larger than the bolt size (recently increased to 1/8" for larger bolts, but 3/4" and 7/8" are still 1/16" larger for 'standard' holes). CISC says all bolt holes shall be 2mm larger (1/16" ~ 1.5mm). So they rounded up...

I'm trying to come up with a good detail at the doorway of an industrial building. I'd planned on having the perimeter grade beam come up about 6" above the slab on grade and leave the slab on grade 'floating'. But at the doorway, throw a couple of dowels in and notch the gradebeam down 6", or...

The NBCC (National Building Code of Canada) Commentary notes that they use an average density of 3kN/m3 if I remember correctly (that's about 19 pcf, sounds like it's in line with other responses), but I believe the commentary does note that that value is conservative in dry areas and could be...

When I worked on buildings, I generally would run live load reduction for column and foundation design, but design the horizontal elements for fully loaded floors. If we were designing an office floor for any more than 2.4kPa the reasoning was to make sure it could handle filing loads later on...

Yep. It does have that table, I missed it. And it appears to match the American code. I guess the 1/4" maximum is just a myth... Thanks a lot Weldtek.

So, I've always specified welds assuming that 6mm (1/4") welds were the largest size fillet welds that can be done in a single pass (Shielded Metal Arc Welding/Stick welding). But, since, I've gotten some conflicting information. Yesterday I looked into it and found that the AWS D1.1 Code...