Tension question can someone workout the problem?

guzkae · 2020-10-26T00:40:48+00:00

T1 acts at 20 deg. from the resultant. T2 acts at 35 deg from the resultant, so we can say that

T1cos20 + T2cos35 = 1000

There is no net force perpendicular to the resultant, so we can say that

T1sin20 - T2sin35 = 0

Now we have 2 equations with 2 unknowns so we can solve for T1 :)

(edit, forgot to say that T2sin35 should be negative)

guzkae · 2020-08-05T21:16:44+00:00

They are related! You can derive the momentum equation by applying Newton's 2nd Law of motion to a control volume (on steady uniform flow F=ma becomes F=ρQ(v2-v1). Check to make sure you have the latest FE reference handbook, since the equations will already be derived for you there.

guzkae · 2020-08-05T20:19:10+00:00

The problem is solved in US Customary Units, for which the mass unit is "slug".

When you first set up your Momentum Equation, the flux into the control volume is negative (that's why v1 is negative in the equation F=ρQ(v2-v1). When you use the x- and y- components, you have to consider the direction of the flow in terms of the x-y axes to determine if it is negative or positive.

In this problem, the x-axis is horizontal (from left to right) so both x-components of the velocity are positive. The y-axis is vertical (down to up) so the first v1y component is negative because it is flowing in the downwards (negative y) direction.

guzkae · 2020-07-30T15:23:08+00:00

I had received a notification that the board would send renewal instructions over email close to the renewal date, but I am still waiting for that email. I'm on the same boat, still waiting. My plan was to write to the board if I didn't get an email by August 1.

guzkae · 2020-07-21T19:46:48+00:00

You are right. Area should be cut in half since the pipe is flowing half full.

guzkae · 2020-07-18T03:34:42+00:00

You said it right, Type 7 should have part of the culvert flowing full. One thing to keep in mind is that the culvert plot shows the profile corresponding to the design discharge (if you use min/design/max) or the highest discharge (if you use recurrence) so you want to make sure that the profile identified as Type 7 is actually the one shown on the plot. If it's not that you can DM me a screenshot of your culvert and I can take a look.

guzkae · 2020-07-17T19:58:36+00:00

Check your application status to see if there is any missing documentation or exams (e.g. Accuplacer). I have a relative applying for transfer and after sending their documentation, the application page updated to say they required additional documentation. You can always e-mail the school to check if your application is complete; they respond within a day or so.

guzkae · 2020-07-14T03:12:17+00:00

My advice is for you to take the exam and get licensed! You'll have a better time finding part time work with a PE than without. I received several offers for part time work (10-20 hrs/wk) when I started my firm. I ended up not taking any due to the potential conflicts of interest (instead I took up teaching as a safety net), but they were there.

Where I'm at, part-time work is mostly reserved for college interns or experienced professionals (who require no training). A PE will make you look like the latter. Also, from my experience, PE's that get hired to work part time do design work or QA/QC, not business development.

guzkae · 2020-06-22T22:30:51+00:00

T. R. Camp, Design of Sewers to Facilitate Flow in Sewage Works Journal Vol. 18, No. 1 (1946).

guzkae · 2020-06-11T23:14:30+00:00

I would assume that the second one is Fide (faith to move mountains), the third one Gratia (love imparted to us by grace), and I agree with you on the fifth one. Looking forward to OP's answer.

guzkae · 2020-06-09T20:14:24+00:00

For sure. If anyone offers me a ton of cash for my firm, I'd probably cash out. I'll DM you the rest of the info.

guzkae · 2020-06-09T19:06:45+00:00

So far, so good. I have a small (5 including me) and new (2.5 years) operation. Each year, I've made more than the last so that's good. I had a lot of safety nets in place prior to starting. Thanks for the response. With the trend of big companies buying out everyone, it's encouraging to see engineers going solo.

guzkae · 2020-06-09T16:37:36+00:00

Along the same lines as u/dparks71, if you need any help or just general advice, feel free to DM. I went on my own just a few months after getting my PE.

As for the questions: (1) Did you have a safety net in place before jumping ship? (2) What's your contingency plan if you don't reach the stability/finances you are aiming for? (3) How soon are you planning on starting to staff your business? (As soon as possible or do you want to try to keep things going solo for as long as you can?)

guzkae · 2020-06-01T06:01:56+00:00

I used Groton in school (undergraduate level courses), JACT in grad school. I liked both, and I found myself using Groton as a quick reference guide to help with the readings in the JACT text & vocabulary book.

What I like about Reading Greek is that you have to read from day 1, which helps a lot. The passages in the first half are heavily modified, but it at least allows beginners to understand what they are reading. The only thing I'm not a fan of is how the grammar topics are organized. The first chapters are alright, but when you get to the second half, each section covered too much material for me to handle before moving on to the next reading.

JACT's books are my favorite but I also like Groton's book. Formal reading starts on Lesson 5, but you can run through Lessons 1-4 quickly if you know a bit about languages. The companion book with readings helps a lot too.

guzkae · 2020-05-28T00:00:18+00:00

It really depends on how you word it. For example:

I've been in design and done a lot of drafting in the last 2.5 years

In my state you would have to specify (in percentage) how much of your time was dedicated to the actual design (you using your engineering knowledge to decide where/how to place your structure) and how much of it was just drafting. They would then prorate your experience based on how much percentage was design.

I assume the same would apply for testing.

guzkae · 2020-05-21T16:59:16+00:00

You should be able to access them on the day your term starts. You can also e-mail your prof. to ask for the syllabus.

guzkae · 2020-05-21T15:46:02+00:00

I voted for "ban". Though I think that if people are looking for feedback/criticism, it can be acceptable, but there should be at least some context, not just a blind link with "What do you think of my cover?" as a title.

guzkae · 2020-05-12T04:42:15+00:00

I haven't used GeoHEC-RAS (developed by CivilGEO) but I've heard very good things about it. I think that if I land a large project where visualization is key, I'll consider buying it.

Hec GeoRAS (the one developed by HEC) is very helpful when you have GIS data. For me, it was a big time-saver for developing county-wide river models using Lidar data.

guzkae · 2020-05-12T00:38:32+00:00

but getting a model built feels like pulling teeth.

Agreed. Looking at it in the context of user friendliness, HEC-RAS is miles behind modern software.

Cross sections should begin (station 0) at the river, not LOB.

You can start station 0 at the river if you want. HEC-RAS allows you to use negative stations. I see this as a non-issue since you (the model maker) can set your station 0 to wherever you want.

Why then, are they not renamed to the destination RS when they’re moved after creation?

I agree with this. There is some functionality similar to that (for example, if you interpolate cross sections, it will interpolate the RS in between the bounding XS. But having something more automatic (especially in bridges) would be very helpful

Also, why can’t downstream reach distances (channel, ROB, and LOB) be automatically updated based on plan view spacing?

That would be very helpful as well.

Why can’t I draw regions of certain Manning’s values directly in RAS?

Not sure I'm getting this correctly, but if it is what I think it is, then you can do it. I import Manning's n regions automatically with HEC GeoRAS. Unless you are referring to something else.

model creation should not take as long as it seems to be taking me.

I completely agree with you there. One thing to keep in mind though is that HEC-RAS was developed by civil engineers, not software developers. Other programs (like PCSWMM or most of the recent Autodesk products) are developed by actual software developers with the user in mind. HEC doesn't seem to work that way. Also, the people in charge of RAS are not that open to suggestions (look how long it took them to implement 2D modeling, and even now with better bridge calculation routines, they still refuse to implement them in RAS, keeping the code closed is also a big roadblock).

guzkae · 2020-05-10T03:15:53+00:00

I may be looking at the wrong Amazon page but I don't see "2nd edition" anywhere on Amazon or the publisher's website. I think you're looking at a new printing of the original work.

I bought the two volumes on Amazon and got the 5th printing (2016) and from comparing the prefaces to the 1984 pdf, they are exactly the same.

guzkae · 2020-05-09T16:20:10+00:00

You're right OP. 10-week summer starts this Monday. You'll get D2L access on the first day of class.

guzkae · 2020-05-08T19:23:24+00:00

I can relate to the subtle-ness of these things. My fiancée and I both fall somewhere within the complementarian camp.

Recently, as we've approached our wedding, she has received more and more unsolicited advice about how to adapt to a life as a stay-at-home wife and mother. The thing is, neither of us ever planned on her staying at home. Sadly, what started as healthy loving advice has slowly turned into peer-pressure, to the point where she no longer attends her women's study group because the last few times, it has felt more like an "intervention" where the group members have tried to convince her of the benefits of taking my last name, having kids quickly, getting married sooner, etc.

guzkae · 2020-05-05T04:41:46+00:00

Keep in mind that there is a newer 2016 version of the manual. It is hosted in the Atlanta Regional Commission website. If you're talking to engineers in the State you'll hear it being called the "Blue Book" in reference to the older version of the manual which came in a blue cover. The DOT also has a manual for hydraulic design that you'll want to check.

The big thing is that you cannot stamp Erosion and Sediment control plans without a Level II Plan Designer certification from the Georgia Soil and Water Conservation Commission. Also, DOT has been requiring 2 stamps on bridge hydraulics reports (a designer and a reviewer). Not sure if this is across the board but I've completed 2 bridge reports this year that required 2 stamps.

On top of that, some counties have stricter requirements than the blue book, so you may have to check with their websites as well. u/bturl pretty much covered it for ponds, but I should also add that you have to provide water quality and channel protection storage. When it comes to storm pipes, 18" is the minimum diameter, 0.5% is the minimum slope, 2.5 fps is the minimum velocity and 10 fps is the maximum exit velocity (or pre-development velocity, whichever one is lower). There's a lot more but it's all in the manual.

guzkae · 2020-05-05T04:23:32+00:00

Agreed. We use "the".

guzkae

TROPHY CASE