Regarding the junction box at the instrument cable connection
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https://bbs.hcbbs.com/forum.php?mod=image&aid=1825003&size=300x300&key=f564a4d3f2d0d9fa&nocache=yes&type=fixnone https://bbs.hcbbs.com/forum.php?mod=image&aid=1825002&size=300x300&key=bf1436798ac12e7e&nocache=yes&type=fixnone Similar to the cable trays in the red box, with irregular shapes – can such specifications and models be purchased, or are they fabricated by the construction team?
It can be processed on-site, or standard parts are available from factories. Try to use factory-supplied materials. Processing on-site is difficult.
We all process things on-site. The quality of work carried out by different construction firms varies greatly, which results in significant differences in the final product.
It can be processed on-site, but it’s better to buy ready-made ones to save time and effort
Try to finish the processing before installation; otherwise, working with fire or at heights will be very troublesome. If the tray boxes are already installed, there’s nothing to do but obtain the necessary permits for using fire and electricity, and then get to work.
Either is fine; we carry out processing on-site. If it’s a custom order, either the dimensions need to be accurate or you need to measure them yourself to ensure accuracy
There are varieties with high-quality materials that can be bent freely available for sale； The accuracy of the levels made by the construction teams varies greatly. The construction team can be asked to carry out the work by cutting materials as shown in the diagram below.
Whether to start production is determined based on a comprehensive assessment of factors such as the project size, workload, number of personnel, and timeline. If the project is relatively small and involves few man-hours, with no one spending much time on the design of cable trays (such as the custom-made components shown in your diagram), then it can be fabricated on-site; simply indicate the route for this section in your diagram and state that it will be made on-site. If the project is large and involves many man-hours, with no tight deadline, and there are enough resources and time to pay attention to these details, then you can design the detailed drawings of these components yourself and include them in the design drawings. I hope this can provide help and reference for your question.
Figure 1: Bridge tray end caps; it is recommended to purchase ready-made ones. Figure 2: Elbows – it depends on the design. If the direction of the bridge tray can be determined clearly, it’s advisable to use ready-made parts. As for those fabricated on-site, it entirely depends on the skill level of the construction team:lol:lol:lol
Take a look at the manufacturer’s samples; these all have names, such as left lower elbow fitting and right lower elbow fitting