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  • Users: engtiuser2
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  1. engtiuser2

    Axis alignment detection

    I am looking for a fast and easy to detect the alignment (misalignment w.r.t horizontal plain) of the wood shaft (10mm diameter, 20cm long) which enters a work area. The shaft is to be fed along the its axis direction with feed rate of around 10 ft/s. The accuracy should be within 0.2 mm per ft.
  2. engtiuser2

    GTAW (TIG) weld is known to be able

    GTAW (TIG) weld is known to be able to produce high quality weld. However, it is not part of the pre-qualified weld for steel. That means, each and every TIG weld needs to be qualified. Is there any known reason for this?
  3. engtiuser2

    Repair of damaged steel structure

    I am looking for reference to help creating a guideline for assessing the damaged steel member and develop criteria for cold straightening. The steels (mild steel) are typical in the sheet and bar form and damages by bending. I am looking for a best practice/industrial standard/ rule of thumb...
  4. engtiuser2

    Calculation for beam orientation

    I am trying to predict the position of the beam after it is pushed (vertically up) on one end to a known displacement. The beam was originally supported by 4 compression springs with identical spring constant. The springs are equally spaced under the beam (supported at 1/5, 2/5, 3/5, 4/5 of...
  5. engtiuser2

    Square Butt Weld

    I must admit I haven't received any formal code based training in welding (just some general welding from school). I am creating a weld spec for joining two 5mm thick stainless steel (304L) sheet metal in corner configuration. I was searching the AWS D1.6 for the prequalified corner square...
  6. engtiuser2

    How to establish margin for Torque test

    I am setting up a torque test to verify an insert nut/joint strength for a steel structure. I am wondering if there is any specification/guideline for how much over torque should be used to take into account for the uncertainties (surface condition, lubrication used, workmenship...etc). As an...
  7. engtiuser2

    Abbreviation in survey plan

    I like to understand the survey plan with some abbreviations which are unknown to me. Appreciate if someone can help with this. This survey was done in 1995 for a private property in Ontario Canada. The abbreviation that I am interested are: Fdn, Bk and Cop (or Cap). Please refer to the...
  8. engtiuser2

    Non-contact voltage tester to detect hot open underground wire

    A private locate came to my backyard and detected a wire is located underground of my backyard which is possibly for the pool heater removed by the previous home owner. I found the part of the conduit which exits the house towards the ground. I like to make sure the wire is not live and I...
  9. engtiuser2

    Design of bolted joint for wood

    Wood shrinks and expands. When wood (e.g, spruce or fur) are used underground (lawn where it can be wet and dry), how to design the bolted joint to allow shrinkage and swelling of the wood. with the given clamp load of the bolt, my concern is whether the wood will be cracked if it swell too much...
  10. engtiuser2

    Compressed air line corrosion

    We have a compressor installed under a train where we use the compressed air to operate different equipment (e.g. door, brake, etc). We notices there are lot of corrosion in the air lines far away from the compressor (at the opposite end of the train). We are suspecting condensation formed...
  11. engtiuser2

    Best practice %preload for bolted joint

    I am designing a bolted joint to take a high static load (over 5 tons). I have done the analysis and sized the bolt accordingly. With this high load, the bolt was found to be about an inch. It will need to be prelaod to 75% proof load (number can be slightly different from different source, not...
  12. engtiuser2

    Eurocode 3 EN 1999-1-3

    I recently required to use EN 1999-1-3 as reference to perform fatigue analysis for the client. I would like to find out if there are good source or reference books which can help me understand how to apply the code in fatigue analysis.

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