Always FRP: near live electrical, Zone 1/2 areas, chemical environments, railway OHE. Aluminium: no electrical hazards, weight matters, frequent relocation. Steel: very heavy loads (500kg+), permanent installations.
Always FRP: near live electrical, Zone 1/2 areas, chemical environments, railway OHE. Aluminium: no electrical hazards, weight matters, frequent relocation. Steel: very heavy loads (500kg+), permanent installations.