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  1. PersonalProfile

    Music in the Office

    A historical discussion regarding similar follows: https://www.linkedin.com/posts/andrewpocock1234_a-colleague-is-moving-a-team-to-a-new-factory-activity-7151242740394016769-Hwxa/
  2. PersonalProfile

    Safe zone around purged vessel

    The following historical information may be of interest: "breathing zone" means a hemisphere of 300 mm radius extending in front of a person's face measured from the midpoint of an imaginary line joining the ears; Ex: Occupational Health and Safety (Confined Spaces) Regulations...
  3. PersonalProfile

    Q1=Q2(P2/P1)^.5 ,where it does come from!

    The following may be of interest: The laws are derived using the Buckingham π theorem. Ex: https://en.wikipedia.org/wiki/Affinity_laws
  4. PersonalProfile

    AS 3600 Cl 10.8 Transmission of Axial Force through floor systems

    I cannot directly assist, though the the AS 3600:2018 Sup 1 includes a discussion, that includes the following reference: OSPINA C.E., ALEXANDER, S.D.B., Transmission of High Strength Concrete Column Loads Through Concrete Slabs, Structural Engineering Report No. 214, Department of Civil...
  5. PersonalProfile

    Wind Fence Failure

    The detail has optimisation options, including: 1. Mixture of materials causes galvanic corrosion, as stated by others, 2. Self taping screws cause corrosion - consider fasteners etc if practicable, 3. Consider alternative material e.g. 316 stainless bracket/fixings, as generally stated by...
  6. PersonalProfile

    Mill reports for redesign

    The following may be of interest: he compliant mill (Figure 1(a)) targets a mean yield strength value well above the minimum requirement of AS/NZS 3679.1 300 Grade. Obviously some of this material will be above the average and some below the targeted average, however all batch test results will...
  7. PersonalProfile

    difference between i and rpm

    1. I speculate that 105.28 is the reducer's precise ratio, and the ratio that you calculated is an "approximate" e.g. a practical motor's angular speed will not be 1300 RPM etc, due to various reasons, including slip, and 2. A ratio of 105.8 exists according to the catalogues available...
  8. PersonalProfile

    AISC Reduction in Load Capacity for Long Bolted Joints

    The following also states background information regarding joint length, if I have understood the enquiry: Figures 5.51 and 5.52 show that a 40 ksi allowable shear stress for A490 bolts would provide the needed margin for joint lengths up to about 50 in. For joints with a length exceeding 50...
  9. PersonalProfile

    Suitable VFD for MV wound rotor motors

    Perhaps consider the suitability of the motor for use with VSD, despite that you have already etc: Even though standard motors are commonly used successfully with PWM drives, drive duty places higher levels of dielectric stress on the motor insulation than are normally present under sine wave...
  10. PersonalProfile

    Ex "db" or Ex "db eb"

    The following states a summary of some potential benefits: This provides a very cost-effective solution that facilitates easy maintenance, allows cables with lugs to be easily handled and cable terminals to be easily accessed. Ex: SIMOTICS XP MOTORS Ex db eb IIB/IIC Main terminal box concept...
  11. PersonalProfile

    Pressure Relief & Vacuum breaker in storage tank

    The following may be of interest, though does not directly address the enquiry: Ex: https://www.amazon.com.au/Chemical-Process-Safety-Fourth-Histories/dp/0128014253 Regards.
  12. PersonalProfile

    Solution to avoid electric cable theft in little EV Station

    The following may state in principle options, though does not directly relate to your request: http://www.iceweb.com.au/ElectricalWeb/Earthing/Reducing%20Copper%20Theft%20.pdf https://liveline.co.za/kwena-anti-theft-earthing-cable/ Regards.
  13. PersonalProfile

    Should pipe based structures (RHS SHS CHS) be sealed or have their ends left open?

    1. I propose generally seal welded - the likelihood of holes etc is relatively low if the weld standards that I am aware of are used, and 2. I interpret the following to state similar, though also the corrosion associated with intentional holes is less than I would have estimated without this...
  14. PersonalProfile

    Built on Wrong Property

    The following may be of interest: In Smith Develop~nt, Inc v Flood 198 Ga. App 817, 403 S.E.2d 249 a builder, without the knowledge or consent of the defendantMs Flood, commenced to build a $40,000 house on vacant land owned by Ms Flood. When the bouse was about 50% complete, Ms Flood...
  15. PersonalProfile

    The new AS/NZS1170.2:2021 - Solar panel/PV loads on roof structure

    I could not find a link to the Amd 2 in public domain, and I interpret that I am not permitted to distribute the document that I have access to. The AWES states, apparently prior to Amd 2: Leitch et al. (2016) presented the external pressures on the baseline building roof and the external...
  16. PersonalProfile

    The new AS/NZS1170.2:2021 - Solar panel/PV loads on roof structure

    I interpret the following video by another committee member to state that the intent of the current note is to ensure the net load difference is negligible. This appears to be contrary to the earlier reference material, so I am lost. I propose is a moot point considering that the proposed...
  17. PersonalProfile

    The new AS/NZS1170.2:2021 - Solar panel/PV loads on roof structure

    The following may be of interest, if I have understood the enquiry, though I am not a subject matter expert etc: 1. Proposed modifications, I added emphasis, according to recent draft for public comment AS/NZS 1170.2 Amd 2, attached, 2a. ...Nett pressures acting on the panels, obtained in...
  18. PersonalProfile

    When do we need a Haz Classification in a Lab?

    The following historical LinkedIn discussion may be of interest as a start, despite that you may be aware etc: https://www.linkedin.com/feed/update/urn:li:activity:7166525599748874241?utm_source=share&utm_medium=member_desktop
  19. PersonalProfile

    Interlocks and Pumps

    The following inexhaustive examples of the risk of deadheading pumps may be of interest: 1. Slurry pump explosion, https://www.rshq.qld.gov.au/safety-notices/mines/slurry-pump-explosion 2. Centrifugal Pump Explosions, and...
  20. PersonalProfile

    PFC steel grade from 1995?

    As stated by others, I speculate: assuming 250, or testing, including using statistical analysis. The following may be of interest, despite does not address the enquiry: AS 1204—1980, Structural steels—Ordinary weldable grades This Standard was prepared as a revision of AS 1204—1972 and AS...
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