My current project (building code: IBC 2009) requires fall arrest D-ring anchors to be post-installed in a concrete wall. When I researched fall arrest anchors, I found many that are compliant with OSHA 1926, but cannot find any that are compliant with IBC 2009, or any version of IBC for that...
I am trying to understand how to design A325/A490 bolts in tension in fatigue applications using AISC 360-05 (13th ed.) and I'm looking for some expert opinion. The ASD 9th edition seems simple enough, but this edition and the subsequent one are not quite as straightforward.
Background: I have...
Hello,
I am looking for a good reference for hand calculation of fluid forces acting on baffle plates for a tank with 4 mixers. I have read in several places that there are a couple of approaches to determining the baffle plate loads. This involves using either the torque/power input from the...
I am need of some advice on ACI 307-98 in regards to the "grouped chimney" effect (vortex shedding) for concrete chimneys. We are adding a new chimney to an existing plant for a project I am working on, and we have a code issue we are trying to resolve.
We had stack modelers do a wind analysis...
I am coverplating existing columns (power plant application), and I have an issue with unbraced lengths. First, the background information: We are coverplating columns with plates welded across the flange tips, essentially forming a tube-shape. About 95% of the existing axial load in the...
Hello all,
I am working on a steel structure in a high-seismic zone area, and the question arose about restraining the bottom flange for lateral-torsional buckling since the vertical seismic loads are large and reversible. As a general rule of thumb at my company, we use 3" as a maximum...
