113 / 132
CABLOFIL STEEL WIRE CABLE TRAY
PRODUCT GUIDE
DESIGN NOTES
SELECTING THE RIGHT FINISH
Suitability of finishes
114
Preventing corrosion
114
- Chemical (atmospheric) corrosion
114
- Electrochemical (galvanic) corrosion)
114
- The merits of Zinc
115
- Common corrosion situations
115
FINISHES
Coated steels
116
- Pre-galvanised (GS)
116
- Electrogalvanising after manufacture (EZ)
116
- Hot dip galvanised after manufacture (GC)
116
- Geomet (DC)
116
- Organically coated electrogalvanised after manufacture (EZ+) 116
- Continuous galvanisation before manufacture (Z+)
116
Stainless steels
- Stainless steel (304L)
117
- Stainless steel (316L)
117
Pickling and passivation
117
INSTALLATION OF SERVICES
Design factors to consider
118
- Distributed loads
118
- Point loads
119
- Snow, wind and external forces
119
- Safety factor
119
- Deflection
119
- Spacing of supports
120
- Location of couplers
120
- Installation of cables within a support system
121
- Testing of cables within a support system
122
- Electrical continuity
123
- Earth protection
124
- Electromagnetic compatibility (EMC)
124
Loading graphs
125
FIRE RESISTANCE AND PROTECTION
- Standard DIN 4102-12
126
- Recognised independent laboratories
126
- Test configuration
126
- Samples of configurations tested
127
113