Members Definition and 164 Threads

Hi, I have to design a steel structured truss footbridge. Im using beam anology to determine the correct member sizes. Having trouble determining the maximum design moment (M*) Here's what I have calculated thus far: Q=6kN/m G=1kN/m 50m long, 3m depth, 3.125m spacing Self Weight...

I am studying statics and more precisely multi force members. I understand the process about solving how to find reactions and forces in x and y directions. However, I have a great tendency to confuse it when if comes to figuring out angles to write equilibrium equations. Any help for me to...

I've been hanging out here for a little over a year trying to learn as much as I can. I tend to read a lot of older posts in addition to trying to keep up with the latest discussions for topics of interest to me. Every once in a while, you'll get some bozo that thinks they're smarter than...

Homework Statement Hi, I've been looking over this problem and I can't manage to find a suitable approach to such a question :S maybe you could help me out. The structure can be seen in the given image. As shown, a load of magnitude is applied to a structure. Assuming that all members...

Right now we show that we have 197,293 PFers. Do we have any guesses as to the date and time that we hit the 200,000 mark?

Its been a while since I've been on here. I moved to the Portland area, and was wondering if there was any more people from this forum in or around Portland? Oh yeah- I'm geeky again now... I'm just looking to see if any PF members want to hang out some time. Should I look in another...

Homework Statement See Figure Homework Equations \sum F_{x} = 0 \sum F_{y} = 0 \sum M = 0 The Attempt at a Solution See Figure I'm fairly certain the force I drew at point D isn't at a 90 degree angle, but if its not I can't find the perpendicular distance for the...

Any help please. Picture in attachments

Truss Analysis :( Homework Statement Find the force on each of the members and tell if it is tension of compression. Homework Equations M = fd \sumFx and Fy = 0 The Attempt at a Solution Well, my professor said to us that the first thing to do is to compute for the...

when given a non homogeneous cross section, i know that i can find the bending(normal ) stresses by transforming the cross section into a homogeneous one by multiplying the area of one of the materials be 'n', where n=E1/E2, then i solve normally, finding the centroid of the new cross...

Name the middle and end-members of fractionation series that start with: a) basanite-tephrite b) trachybasalt, c) hawaiite.

Homework Statement Homework Equations * If the only members of an unloaded joint are two noncollinear members, both members are zero-force members. * If an unloaded joint has two collinear members and one noncollinear member only, the noncollinear member is a zero-force...

Method of Members, With Pulley. 1. The radius of the pulley is 2ft. 2. Well, I don't know where to start. I know there are three equations EFy=0, EFx=0, EMc=0 but I don't know what the first member to consider and how to solve this type of problem. Especially a pulley is concerned...

Frame Analysis Using Method of Members. Determine the force in bar BE. 2. Well, I don't know where to start. I know there are three equations EFy=0, EFx=0, EMc=0 but I don't know what the first member to consider and how to solve this type of problem. There is a final answer given, BE =...

1. Determine the type and magnitude of force in bars BD and BE using method of members. 2. Well, I don't know where to start. I know there are three equations EFy=0, EFx=0, EMc=0 but I don't know what the first member to consider and how to solve this type of problem. 3. There is a hint that...

Hello, I am a senior and am planning to go to a physics gradschool. Looking at several forums and tips online, I came to know that it is good to contact faculty members of prospective gradschool. But I am not sure how to start the conversation, like what to talk about and how. What should i...

In how many ways can a committee of 5 be selected from 35 members?

any one help me... HOw many committees can be formed with at most 5 members?

Homework Statement A solid circular bar ABCD with fixed supports at ends A and D is acted upon by two equal and oppositely directed torques T_0. The torques are applied at points B and C, each of which is located at a distance x from one end of the bar. (The distance x may vary from zero to...

Homework Statement There are 5 girls and 2 boys. A committee of 3 members is to be formed such that there is at least one boy in the committee. Find the number of ways of doing so. The Attempt at a Solution One place is fixed for a boy. So choosing one boy out of 2: 2C1 I am left...

[PLEASE HELP!] Forces in members of a truss Homework Statement A barrel vault truss is loaded as shown. Knowing that the length of the bottom chords DF, FH, ..., and QS is 3 ft, determine the force is members IK, JL, and JM. http://img68.imageshack.us/img68/4817/fyjfhjfgjhfghgx8.jpg...

100,000 Members! We should break the 100,000 PF members mark in the next few days - we have been growing at a rate of 150 to 200 members per day but it does vary. As of right now we are at members = 99,565. I think this is a huge milestone for PF. Congratulations to the Admin and staff, our...

Good evening I'm in the midst of reviewing for my exam, I've come across a piece of code I don't understand. It is as follows: ////////////////////////// #include <iostream> using namespace std; class number{ private: int value; public: number(int v){value = v;} void...

What is the easiest way to determine the two force member in a frame question? When I look at a frame and see the pinned connections, I automatically assume that there is a reaction in the x and y directions. How can I tell at which pin there is only one reaction, and what direction it is...

I'm using VS C++ 2005 in MFC, and I'm trying to access a member of another class. I'll try and make this as short as possible and still give the whole picture of what I am trying to do. I created a SDI with the CFormView Class. I have a dialog with an edit control box with a CString...

Hi guys! The question is attached!...sorry!...theres weird symbols in the question any help would be v. much appreciated!:smile:

let A = {z(belogs to)C | z^6 = −64} list all members of A how many distinct members of A are there?

Hello, My name is Mike. I am new to this forum. Just saying helo. ________________________________________________ phentermine without a prescription q [/url]

We're cookin... We should hit 100,000 in about 300 days. Congrats PF!

I'm laying in bed saturday morning cruising the internet and I started reading Mr. Robin Parsons's old posts and I did a quick google search. Here is his new blog. http://ca.blog.360.yahoo.com/blog-oNTYs588aehD1wSrmHN.TWxMY99HFKk-?cq=1&p=98 I don't know why his story is so intriguing...

:smile: 1.What is the concept of zero force members? 2.How to observe them in truss structures? 3.Can provide some examples? Thanks A Lot. Thanks for sharing.:blushing:

hello i hope i have came to the right place. i have this question and I am having difficulty doing it and was hoping you lot could help me i have attached a diagram and what i have to do is. Produce calculations for the force in each member due to loads P and 2P it is symmetrical as...

How many PF members are there? Total? "Regulars"? Is there a tool keeping track? If not, how do we install a big brother to find out?

Diagram: http://i177.photobucket.com/albums/w222/77whtrocco/NORMALSTRESS.jpg Given: members AB, CD, and EF have x-sectional area of 25 mm^2. E = 200 GPa. Neglect deformation in member GH. Find: Normal Stresses in members AB, CD, and EF. I know that I need to determine the axial forces in these...

Congratulations PF! I would imagine that we passed 50,000 sometime today.

Which cube members are not in the sequence and prove it? 2, 5, 8, 11, 14, ... How can this be proved :cry: My answer: an = 3n + 2 Any natural number may be written as N= 3k+p for some natural number K and p=0,1 or 2. So N^3=(3k+p)3 N^3=3(9k+k^2p+kp^2)+p^3 N^3=3k+p^3...

Who would you most like to see in the White House? Some one from the Libertarian party, or the Green party, or the Constitutionalist party or the natural law party, or the communist party, or what have you.

Number of PF members: 33 333! The exclamation signs do not stand for nested factorials, though. :smile:

Everyone tells me here, time travel is not even *theortically* possible. Some scientist are bold and say time traevl to the future IS possible. I don't understand why no one here even accepts it as a theortically possbility? Physics allows it, and I don't have a PhD in physics but according to...

I'm 17, time to start my higher-level education and I'd like to share my great news to the rest of the community. I was accepted to The Pennsylvania State University - Main Campus for Aeronautical Engineering! :-p That is my #1 choice and I'm so ecstatic!

Yoko Ono is 72. :cry: :cry: :cry:

Last check: 29,523 Day and time? I'll guess next Monday at 8 PM PDT.

Well here is what happened. Long rant so be prepared. All throughout my time at community college I worked my *** off to keep a good GPA. This last semester was my final semester in my Computer Programming and Analysis diploma program. All I needed was to receive four 4.0 across the...

Today I was notified that we will be having manditory PT for DEP members every Wednesday. We used to only have to go to a DEP meeting the second Wednesday of every month. I got out of it this week, but now I have to find a ride to Greenwood every Wednesday at 17 00. I don't have a car, so this...

Question for the "old" members of the forum Hi everybody, This is a question mostly for the older members of the forums or anynone who knows. I was wondering if any important mathematical result has been firstly posted here, or if there is anything interesting that has come up through the...

if you want to post in GD, act like the other members and... -in case of a word like ****, use stars on less letters to make it s**t or something simaler -in the case of crap, use an at symbol to make it cr@p -Make sure your thread has lost topic by at least page 5. if not, it could...

This is a thread that may only be posted in by yellow members. If you are yellow, post a remark or two. Isn't it nice being yellow?

I have no idea why I'm curious about this. Probably half to get some body types to go with the faces in the picture thread and half because I've been obsessing over NBA draft scouting recently. Anyway, I measured myself recently and came out right around 6'3", 180 lbs.

Many years ago I was a substitute teacher for the PF Academy for Incorrigible Youths. On my first day teaching I was pulled aside by the principal who told me a little bit about the kids in my class. “You have a rotten bunch of kids to look after, I feel sorry for you. These are the bottom of...

Easy riddle: Mom and pop have 6 sons. Each of the sons has a sister. How many members are there in that family? Answer (highlight): Nine (9)