Dimensions for sheet steel, cast iron, aluminium alloy or plastics indicator plates. Colours and finish, tests for impact resistance, colour stability, resistance to weathering, flexibility and security of removable numerals. Recommendations for fixing.
BS 3251:1976 history
0000 BS 3251:1976(1999)
1976BS 3251:1976 Specification - Indicator plates for fire hydrants and emergency water supplies