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Recent content by Navid.Nik

  1. Navid.Nik

    Checking bolt torque in freezing condition

    I have a question regarding the bolt tightening in the freezing condition. The connections are not slip critical, so the bolts in the steel structure is going to be snug tight, but the construction is located in an area that is going to be a freezer. Should the bolt tightening to be checked...
  2. Navid.Nik

    Bracing short mezzanine structure

    I need to approve an industrial steel mezzanine structure with 1.1 meter height. It is only a 10 square meter mezzanine that is intended to be used as an access point to another structure. It is a self standing structure, but they have not used sort of the bracing. I was wondering if we can skip...
  3. Navid.Nik

    Vibration measure on a structure with a vacuum pump

    I am designing a cold-formed structure on which there is a vacuum pump is going to be mounted. The motor data is as follows: rotation speed= 2000 min^-1 noise characteristic= 86 dB Vibration characteristic= 20 µm From the rotation speed, I can say the frequency is about 2000/60= 33 Hz. I am...
  4. Navid.Nik

    Foundation bearing

    In a project, they made a mistake in installing a mezzanine and the whole structure is shifted. Since the columns are not matching the location of the foundation pads any more, the foundation does not fulfil. Could someone please advise a solution for it? The foundation is built, and the...
  5. Navid.Nik

    Point load on bottom flange

    @Kootk, thank you very much for your detailed explanations, it helps me a lot. @jayrod12 and Kuhladula, thank you for the details, they gave me some insights. @dik, sure that's a good idea to prevent torsion @rb1957 the thickness is 3 mm with 85 mm width. The static load from a hanging person...
  6. Navid.Nik

    Point load on bottom flange

    There is structure in which they are going to use it as a training for professional climbers. The structure is a cold-formed mezzanine with C sections. They are going to connect their clamps to the bottom flange of the C-sections. The point load is about 6 kN which can be carried by the...
  7. Navid.Nik

    Weld stress calculation

    I have a handrail post which is connected via a welded plate. I wonder if I am calculating the weld stress correctly. Could someone please correct me if I am wrong? The load and dimensions are shown in the picture. The post is a SHS section...
  8. Navid.Nik

    Concrete expansion joint in between base plate

    Thank you for your answers. The base plate is for a mezzanine with a relatively high load (The column pressure is about 110 kN). Since all the members are produced based on their certain length it was really hard to move the column layout. But shifting the column position seems the only way to...
  9. Navid.Nik

    Concrete expansion joint in between base plate

    Due to a mistake, a base plate (with post-installed anchors) is placed on a concrete expansion joint (the expansion joint is exactly crossed the base plate). I want to check if the anchors are still fulfilled. I think I need to assume the expansion joint as the edge of the concrete and calculate...
  10. Navid.Nik

    Double C-section profile connection

    Hi, I would like to ask for a bit of advice on a connection design. We usually use this connection for the double c-sections to connect the beams to the column But now there is a special situation for a project that we need to put the beams face to face like this Could anyone suggest a...
  11. Navid.Nik

    Effective cross section properties

    Hello everyone I am looking for a tool that can calculate the effective cross-section of a cold-formed section. Do you have any suggestions for it? I found some software, but I am looking for a free software/spreadsheet since I just need to check a few sections with it!
  12. Navid.Nik

    Steel protection against corrosion

    Thank you very much jaskamakkara. Yes, exactly! That is also my other discussion with the customer. In the structural calculation report, it is clear that the columns are considered as hinge connection, however, the concrete layer definitely changes this assumption.
  13. Navid.Nik

    Steel protection against corrosion

    Hello everyone, I have a project in which the customer wants to pour extra concrete (300mm) later on for flooring etc. The structural columns are HSS sections and they have a galvanized coat on it, but I am still worried about the corrosion of steel especially in the first stages of concrete! Do...
  14. Navid.Nik

    Plate size limit in joint

    Hi all, I am checking a calculation for a connection. The column is HSS profile and the beam is a cold-formed C-section, and they are connected via a plate with bolts. In the report, it is stated that the value "S" should be at least 2.5*t2. It makes sense to have a limit here because of the...
  15. Navid.Nik

    Preventing lateral torsional buckling by particle board

    Yes, you have a good point. The particleboard in this project is 38 mm thick and its bending strength is 15 N/mm2, which seems quite strong :)
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