Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by MatthewMansfield

  1. MatthewMansfield

    Calculating Overturning / Resisting Moments of a gravity Wall.

    Hi Steveh49 Thanks for the response, I do agree but this is not a real structure, it is just for my understanding. The reason why I picked the point of rotation as shown on the sketch is because that the point i just wanted to calculate from. But is the math correct or am i missing something...
  2. MatthewMansfield

    Calculating Overturning / Resisting Moments of a gravity Wall.

    Hello all I was wondering if anyone could help me with the following problem. I am digging a hole in the ground that is 1.946m deep and erecting a wall. I am trying to work out whether my overturning moment of the wall is greater than the sum of all the resisting moments. Below is an image...
  3. MatthewMansfield

    Safe Load Bearing Capacity

    Hi BigH Thanks for the response. The soil type is dense gravel with a friction angle of 30 degrees. I used terzaghi bearing capacity theory to come up with the figure of 1238kN/m^2. The figures do not represent reality. I am having trouble in understanding when i have exceeded my safe soil...
  4. MatthewMansfield

    Safe Load Bearing Capacity

    Hi HTURKAK Thank you for your response. I am still not any the wiser. Just to clarify the safe soil bearing capacity is 1238kN/m^3, rounded to 12000 kPa as per your response. The weight of the foundation is 73.5kN as per your response. The load I am applying to the foundation is 2420kg...
  5. MatthewMansfield

    Safe Load Bearing Capacity

    Hello all I was wondering if anyone could help me with the following load bearing capacity problem:- I have worked out that I have a safe soil bearing capacity of 1238kN/m^2 The area of my foundation is 5.883m^2 The total load I am applying to my foundation is 2420kg. Just based on this...
  6. MatthewMansfield

    How To Calculate Pressure of Underground tank walls and how to calculate wall thickness.

    Hello all I was hoping someone could help point me in the right direction regarding the following problem. I have 2 x tanks, 1 x cylindrical and the other rectangular of a given depth H that will be installed below ground with just the top of the tank exposed as shown below:- These tanks...
  7. MatthewMansfield

    Slope Equation for Self Cleaning Sewage Pipes

    Hello all I was wondering if someone could help shed some light on an equation I found regarding obtaining the slope of sewage pipes in the following paper:- The equation that is quoted to obtain the slope (equation 13) is given as:- S = 4.65 * N^2 * D^(-4/3) * (q/Q)^(-1/2) * v^2 I...
  8. MatthewMansfield

    Converting latitude longitude altitude into XYZ Co-ordinates

    Hello all This may not sound like a civil question but I can assure you it is related to civil engineering. I am trying to export elevation data from Google Earth Pro of a town in Peru. I have obtained latitude, longitude and altitude data for the area I am interested in however I need to...
  9. MatthewMansfield

    Fixed End Moments for 2 x Different Point Loads

    Hello all I am trying to find or work out how to calculate the Fixed End Moment (FEM) for 2 x different point loads. I have the following sketch:- All of the FEM tables I have found don't have an example where there are 2 x different point loads and I was wondering if any once could shed...
  10. MatthewMansfield

    Taking Moments Propped Cantilever

    Hello all I was hoping someone could shed some light on the following question:- I have a propped cantilever beam as shown below:- https://files.engineering.com/getfile.aspx?folder=57d226be-8951-4719-8660-5cd38e42a5f3&file=Question.png I want to work out the vertical reactions at support A...
  11. MatthewMansfield

    Describing Different Types of Structures

    Hello all I was wondering if someone help clear up some confusion I have regarding different type of structures. Below are 4 x diagrams of beams:- https://files.engineering.com/getfile.aspx?folder=0e9e3c2d-26b2-44d8-9107-5bf3d572155d&file=Beam_Types.PNG I have seen these types before but...
  12. MatthewMansfield

    Using Multiple EI values in Beam Construction

    Hello all I wanted to ask about beams. I have the following structure:- My question is that given this structure is composed of 2 x different EI values (the first 4m being EI and the last 8m being 2EI) then what would the purpose of using 2 different EI materials on a beam? I can only...
  13. MatthewMansfield

    Deflection Question

    Hello all I was hoping someone could help with the following:- I have a pin jointed truss (all members are joined by frictionless pins and load is only applied to the joints), supported by 2 x pin jointed supports. If my pin jointed structure was loaded solely at a joint with 200kN which...
  14. MatthewMansfield

    Pin Jointed Truss Deflection Question

    Hello all I was hoping someone could help with the following:- I have a pin jointed truss (all members are joined by frictionless pins and load is only applied to the joints), supported by 2 x pin jointed supports. If my pin jointed structure was loaded solely at a joint with 200kN which...
  15. MatthewMansfield

    Calculating Vertical Support Reactions

    Hello all I was wondering if anyone could help explain how the Vertical reactions for the following structure were calculated. https://files.engineering.com/getfile.aspx?folder=f3cfa35d-9ea9-4d8a-b546-d7c1c08cd079&file=P1.png I am able to calculate the Horizontal reactions. It is the vertical...

Part and Inventory Search