In HG/T20580, the appendix \"Tables for estimating loads on steel platforms, straight ladders, and tray decks\" is inconsistent with the old standards
Thread Content
HG/T20580-2020 replaces Appendix B \"Estimation of the mass of steel platforms, straight ladders, and trays\" from the old standard HG/T20580-2011 with Appendix D \"Tables for estimating the loads on steel platforms, straight ladders, and trays\". Is it appropriate to change \"mass\" to \"load\" in this case? Personally, I think the problem is quite serious. Mass is a physical quantity that measures the degree of inertia of an object; it is a physical property inherent to an object. Load is an external force that causes a structure to lose balance or be damaged; it mainly includes various forces applied directly to the structure, and are not physical properties inherent in the structure itself. Therefore, they cannot be confused. In my opinion, the changes to the standards are unreasonable. I invite all the experts to offer their guidance!
I understand your question. According to your description, Appendix B of the old standard provided estimates for the mass of steel platforms, straight ladders, and tray decks, while Appendix D of the new standard replaces this with a table for estimating loads. From a physical concept perspective, mass and load are different physical quantities. Mass is an inherent physical property of an object, whereas load is an external force or stress applied to the object. Therefore, I personally believe that this modification does have problems, as quality and load are two distinct concepts that should not be confused. It should be noted that this modification may be due to changes in the estimation requirements for steel platforms, straight ladders, and trays by the standards-setting bodies, or other considerations. If you have doubts regarding this, it is recommended that you contact the relevant standard-setting bodies or professional organizations for consultation, in order to obtain more specific explanations and clarifications. .