You're right...the expectation is 7 hours of work in a 10 hour shift. So I guess being productive 70% of the time they are on shift. So time being productive would still be 7 hours even if available is only 9.25. Otherwise my calculation would 9.25*.7=6.475. I think the objective is for them to...
I have recently stepped into a new job and am having a lot of trouble getting my head wrapped around this. It was planned for a contractor to complete a job with a .70 productivity factor. Their shift will be 10.5 hours per day. This includes a :30 minute lunch, and about :45 minutes of...
I have a question about IFR sheeting design. We recently had a tank out of service and had a part of the roof fail while people were working on it. I am trying to back calculate to check the stresses and loads in the sheeting that caused the failure. I really want to see how bad the strength had...
We are being required to engineer appropriate blind flanges to bolt to pump cases for blinding whenever we take the pump out of service for overhaul.
The blind flange will be designed on a case by case basis and will be designated to the certain pump and bolted to the pump case.
Thickness will...
BA, thanks for the explanation. Also, I just looked at my calcs and did get the 211.5 for OTM and accidentally wrote down 221.5. No biggie though.
As far as the cantilever goes, the "wall" is technically a bowed out banana shaped wall. The peak of the bow is right about h/2 and is connected at...
Thanks guys, very helpful and much appreciated.
Here's a little bit more info and my numbers.
W: 30,000#
AC: 22ft
DC: 36ft
AB: 67ft
AD: 33.5ft
T: arccos[(DC^2-AD^2+AC^2)/(2.DC.AC)] = arccos[(36^2-33.5^2+22^2)/(2.36.22)] = 65.47*
DE: DCsin(T) = 32.75ft
P: arccos(DE/AD) = arccos(32.75/33.5) =...
Want to make sure I'm going about this correctly.
I have a wall leaning at angle 'phi' at a weight of 25,000#. I'd like to put a bracing column up to support it at angle 'theta'. The brace will be welded to the wall and then bolted into the concrete through a baseplate. I was going to design my...
There is no actual detail in the drawing it is just the call out in the BOM section.
These are for a burner tip in a fired heater. Also, the port circle is correct as they are machined around the burner tip similar to a bolt circle.
The drawing we do have is from 1978.
I've got a machining callout on a drawing that I haven't seen before. Wanted to see if I could get some help.
The callout is "60* T < on 3 1/4" Port Circle".
The * is for degrees.
I'm thinking that this just means total angle but haven't found anything to verify.
@racookpe1978: As far as the load goes, we will be able to support it because we have access to the joists. So my questions is definitely in regards to the masonry falling/collapsing from it's own weight as we demo the wall.
@KootK: Thanks for the comment about the church renovation fails! We...
We are doing a remodel at our church that consists of cutting a large opening in a CMU load bearing wall. My question is in regards to supporting the bricks above the opening during demo before we set in our steel supporting beam and column.
Bricks are 6 1/8" wide and the wall is about 10'...
The total load of the vessel, which is a heat exchanger that includes the channel, bundle, heads, and process is 24,000 lbs. I'm designing each trunnion to carry the full weight alone plus a little more, hence the 30k per trunnion.
Repad is an option but not much of one. Moving it closer is not an option. The 8" is as close as I can get.
My vessel diameter is 40" at the location of the trunnion and the wall thickness is .500".
The vessel previously had two small lifting lugs (.75" x 5" base) that were damaged and...
I am trying to design two lifting trunnions for a PV and I'm having trouble getting the shell stresses to cooporate. I'm following Procedure 5-4 from Dennis Moss' PV Design Manual 3rd Ed. but the stress values I'm getting seem to be way too high. I'm using a 6" S/XXS A106 pipe, 30kip load at 8"...
I just recently got a job as a Reliability Engineer in the refinery and have been hired at our Coker unit. We have just started turnaround and are seeing some unexpected things on the inside. This is the second turnaround for this unit.
Our drums are 2" ASME SA387 Gr. 22 CL2 with 1/8" 405SS...
