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Hi please find the attached files. This is an existing house. The owner wants to make some renovations. Before in the links denote to before renovation, while after denotes to after renovation. I proposed the W or I section displayed in green in the attachments to be placed under the the lower...

Hi all, I'm planning on using combined RC footing for 2-post car lift of rated load of 4000kg. Do you recommend slab-on-grade 150mm thick with WWR, or my combined RC footing is more convenient? Also, is single column footing with pedestal is applicable?

Hi all, Have you ever encountered a flat plate with depression for planting? Please find the attached filehttps://res.cloudinary.com/engineering-com/image/upload/v1725910112/tips/Planting_area_h5xy1f.pdf The depression would be 600mm.

Hi all, This link: https://www.bgstructuralengineering.com/BGSCM14/BGSCM009/BGSCM00903.htm has a 2nd Order Analysis Example: https://www.bgstructuralengineering.com/BGSCM14/BGSCM009/2ndOrderAnalysisExample.pdf MB=1040ft.lbf+500lbf*(.0403in) They made this multiplication 500lbf*(.0403in) equal to...

Hi all, please find the attached thread: javascript:openindex(450,450,'http://www.tipmaster.com/includes/refinfo.cfm?w=450&h=450%27) So the black object is hanging from the cantilevered wall above, does this mean the cantilevered wall above (the dark green one) is acting as a hanger for the...

Hi, please find the attached file. The gridlines are as follow: X: 0,4,4,4,8m Y: 0,5,5 The picture displays moment isolines for gravity loads for DL and LL ultimate combination. Is it reasonable to have as much as 58.5 (metric units) at one-way and two-way solid RC slab intersection? And...

Hi all, I tried solving Example 14.1 in the Braja M. Das "Principles of FOUNDATION ENGINEERING" textbook using Mathcad, but the results doesn't seem match the manual calculation. Please find the attached file. I tried solving it using soil pressures rather than soil net pressures used in the...

Hi all, Please find the attached image. Do you think the proposed geometry acceptable regarding center of mass and center of rigidity considerations? FYI the red circle is the center of...

Hi all, Please find the attached image. The building has 2 basement floors+ 2 floors (used as shows)+ 4 typical floors (used as flats). The mat foundation is 800mm thick. The basement floors are 3.6m high floor-to-floor each. My first thought is using piles for excavation support. My worry is...

Hi Please find the attached image. How one use edge beams for the flat plate perimeter considering positions of lift and stair?

Hi all, I tried to find out column axial load for Example 13.3 in Nilson's Design of Concrete Structures textbook, SI units, 14th so I can compare it with Autodesk Robot Structural Analysis. Please find attached link: Robot results 335.71kN My hand calculation results: 375kN Is it comparable...

I wonder how one can detail HSS truss bearing on wide flange column. My thought is welding angles on sides of HSS, welding cap plates over wide flange columns, and bolting outstanding legs of the angles on cap plates over the wide flange columns. Any thoughts would be highly appreciated.

Hi Please find the attached link: For the given grade beam material and geometry, is the allowable differential settlement calculated correctly?https://files.engineering.com/getfile.aspx?folder=a61c85b9-97b8-4fdb-bfc6-e298afcc47f5&file=Grade_Beam_Allowable_Settlement.pdf

Hi, Re Example 11.9 from Klaus-Jurgen Bathe's Finite Element Procedures textbook, in first sweep, I could get big lambda and big phi, in second sweep, I could get big lambda, but failed getting big phi, in third sweep, I could get big lambda, but failed getting big phi, Does this make sense? How...

Hi all, I wonder why LU for this matrix retrieves such LU decomposition result. M= -0.5 -1 0 -1 -1 -1 0 -1 -0.5 L= 1 0 0 0 1 0 0.5 0.5 1 U= -1 -1 -1 0 -1 -0.5 0 0 0.75 While it should be: L= 1 0 0 2 1 0 0 -1 1

Hi all, After tridiagonal matrix construction step, how one could get eigenvalues and eigenvectors?

Hi all I wonder how one could get eigenvalue and eigenvector in Lanczos method.

Hi all, What considerations one should take in analysis and design of concrete cranked beams? If my query isn't clear, I can upload images. I searched this forum for cranked concrete beams, but without success.

Hi all This thread: https://www.eng-tips.com/viewthread.cfm?qid=479910 How the three component parts of the load path in the link above posted by Menai be used in an RC stair?

Hi all, I'm designing a steel structure (Pratt type) with the following information: Span: 21m Bay spacing: 3.7m DL (excluding self-weight): 1kN/m^2 LL: 1kN/m^2 Wind speed: 100 km/h Upper chord: HSRE 6x5x0.375 Lower chord: HSRE 6x5x0.375 Post: HSSQ 5x5x0.5 Diagonal: HSSQ 5x5x0.5 Strut: HSSQ...