Recent content by henerythe8th

The fans are not stalled. They are periodically monitored for vibration. The 100hp motor for Fan 1 is currently limited via a VFD. The 60hp motor for Fan 2 does not have VFD. The fans are not identical. Because they were purchased at different times and circumstances. Whatever the action with...

Thank you for the help so far!

I have inherited (new job) a fairly large ventilation fan system that has two fans -- I'll refer to them as Fan 1 & Fan 2. They operate one at a time and are dampered out when not in operation. Fan 1 -- I consider a good installation and Fan 2 -- I believe is a poor installation. I have basic...

Howdy KootK! Thanks for the response. Do you have information that relates your answers to code, specifications, etc.? What is a PIP document? Thanks!

I am not responsible for the design of the stack. I got involved due to an 'odd' installation methodology. Since then a lot of discussion has been had about several characteristics of the stack design, anchor rods, etc. I have researched ASME STS-1, SMACNA Guide for Steel Stack Construction...

That could prove useful, but the code of record that I am bound to work to is 2005.

I've had several discussions relative to calculating nominal concrete breakout strength in shear of a group of anchors using Eq (D-22) using the 2005 edition. I have also read many threads here. Is there a limit relative to edge distance after which there is no need to use the concrete breakout...

What code applies to a pneumatic conveyor systems cyclone separator (aka impingement tank). ASME B&PV specifically excludes separators and 15psi and below. Anyone got an idea? One of the places that this is going to is-- what code would be used to weld AR plate with a strength greater than...

Thanks for the info, will make for an even better discussion with my cohort! henerythe8th

Thanks steve1! Do you apply a percentage "adder" to the weight of the skid to account for the hoisting? Or do you just design the skid as if it were just hanging by its lift points? henerythe8th

Thanks for the info! Just to clarify. I am fishing for information regarding the evaluation of the skid structure, not the crane structure. A commercial, portable crane will be used for placement and relocation of the skids.

While in a discussion regarding the analysis of some portable skids that will be lifted with a crane (about 8ft X 30ft) the subject of "hoisting loads" was mentioned. While the hoisting should be performed in a "smooth and consistent manner" it seems logical that a "dynamic load" will be...

The "localized spalling" that Ron is speaking of can be dangerous in some circumstances. The spalling can occur due to the aggregate in the concrete exploding due to rapid expansion from the weld heat. I saw it happen years ago in high school shop class when the teacher made a rather large...

rkuhn, Check with your structural guy if you have one. You may have special circumstances with B31.11, but "normal" (UBC/IBC etc.) structural code applies seismic loads to dead loads. The slurry would normally be a live load. henerythe8th

rchanke, The link that pennpoint left above is interesting and I have seen a "homegrown" equivalent that I like even better, but it can require a return line if you still want "cold" water at the location. The system in pennpoints message uses a pump on a timer, which recirculates at specific...