BSI - BS 1247
Specification for Manhole Step Irons
|Publication Date:||30 September 1975|
|ICS Code (External sewage systems):||93.030|
|ICS Code (Ladders):||97.145|
Test and general requirements for general purpose and precast concrete types of manhole step irons, including harpoon and round bar corner pattern types. Appendices on tail dimension checking gauge, proof load test and information required from the purchaser.