What is the difference between instrument tray spans of 2m and 6m?
Thread Content
In the past, projects have always used spans of 6 meters; recently, however, it has been observed that some projects use instrument trays with spans of 2 meters. Is there any difference in this?
There’s no difference; it depends on environmental factors and distance, so the quote might vary slightly
I don’t understand. Could there be too many things installed on the bridge?
Those with a length of 6m are considered long-span cable trays, and there is no difference in their usage
The installation is slightly different: for 2m lengths, a bracket (similar to a track) made of angle steel or channel steel is required, while for 6m lengths, they can be supported directly by knee braces at intervals of 2–3m.
Is there a difference if it is placed on a pipe rack?
Are there any particular considerations for cable trays placed in utility tunnels?
There shouldn’t be a big difference. Two factors need to be considered: one is the fixed support; with more joints at two meters intervals, more support is required, or brackets can be used underneath. Another issue is that there are more 2-meter connectors, which means you’ll need more mounting plates and screws, making the installation more complicated.
No, it depends on the space available for installing the cable tray. If there are long straight sections, use a longer one to reduce work volume and thus lower costs; if there are many turns, use a shorter one to make bending easier. There’s no difference.
Instrument cables should not have a significant impact on load-bearing capacity or the structure; 2m lengths are also acceptable, though they come at a higher cost.
Regarding cable trays, manufacturers can now produce either 2-meter long units or 6-meter long ones. Using 2-meter long units requires more work for installation, there are more connection points, and thus more supports are needed; whereas 6-meter long units require fewer supports. The choice depends on the specifics of each project.