Support spacing for hot-dip galvanized grid cable trays

2-3 meters, it also depends on the width of your cable tray

Section 6.2 specifies 2 meters, but 2–3 meters is generally acceptable on site; it depends on the width of the tray box, and if heavy loads are to be carried, it’s best not to exceed 2 meters

This specification refers to trough-type cable trays, and does not mention grid-type cable trays. I’ll post an updated version

The spacing between bridge rack supports needs to be calculated; the distance depends on the weight of the cables running on them. For reference, GB50217 Code for Design of Cables in Electrical Engineering: “6.2.5 The structural composition of cable trays shall meet the requirements regarding strength, stiffness, and stability, and shall comply with the following provisions: 1 The load-bearing capacity of the tray shall not exceed the value obtained by dividing the maximum load at which permanent deformation of the tray first occurs by a safety factor of 1.5.” 2 The relative deflection value of ladders and trays under allowable uniformly distributed loads should not be greater than 1/200 for steel structures ； For aluminum alloys, it should not be greater than 1/300. 3 The ratio of deflection to arm length of the steel bracket under allowable load should not be greater than 1/100. ”