What additional information do I need to supply to the cable tray manufacturer for them to best understand and satisfy my needs?
Where? Job site and installation considerations
1.Outdoor
> supports available affect the length and strength requirements
> environmental loads, ice, wind, snow, and possibly seismic
> corrosion requirements affect the materials and finishes
> classified hazardous locations affect the cable types acceptabl
2 . Indoor
> support locations available affect the length and strength of the system
> industrial installation may require a 200 lb. Concentrated Load
> commercial or institutional installation may make system appearance, system weight, and space available important factors
> environmental air handling area may affect cable types, cable tray material, or cable tray type and need for covers
> classified hazardous locations affect the cable types acceptable
What?
1.Type and number of cables to support
> NEC cable fill requirements dictate size, width and depth, of system
> cable support requirement may control bottom type
> largest bending radius of cable controls fitting radius
> total of cable weight determines load to support
2.Future requirements
> cable entry / exit freedom
> design partially full or an expandable system
> support type to allow for needs
Source: Cable Tray Institute (CTI)