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I'm designing foundations for large (tall) industrial tanks and I have two related topics that are not clear to me. Using ASCE 7-16 for wind pressures, 29.4.2 gives criteria for when to consider tanks grouped, isolated, or when to interpolate the drag coefficient. However, there does not appear...

Does anyone have a design approach for a reduction to the MWFRS wind pressure if a cladding is used with a given percent openness that involves more than just reducing the pressure based on the percent open? Here is the situation: We're designing a facility to be hardened for an extreme wind...

It's similar in most regions my projects are in. I don't recall a 3ksi mix submitted that wasn't reaching 4ksi or higher. So I'm not sure how the GC in this case priced a 3ksi mix if most suppliers would be providing the same mix either way. Any estimating personnel out there have input? Make...

Hello. Long time, first time. Until recently, I've understood that 3ksi and 4ksi concrete mixes were comparable from a price perspective. I had a design manager with a GC indicate that their pricing exercise may have been completed with 3ksi mix and using 4ksi would be an unnecessary cost. He...