Folks - a lot of the 50+ year old mast bases, especially between Brentwood and Seven Kings, appear to have been fitted with Heath Robinson like jackets some 3ft high from the ground. They look to me like an ill-fitting sock! Anyone know what these are for? Is it to rigidify the masts and mask any corrosion where they enter their concrete "feet"? If so, what's the design life?
The so called 6" masts were assessed as being inadequate in many situations. The usual mode of failure of masts is buckling at the bottom. To strengthen them one can add more steel to the lower third or so, or encase them in a reinforced concrete jacket.
The embedded masts can also suffer severe corrosion just above the concrete and these can be repaired in similar manner.
The design life for original and repaired OLE structures is 40 years (!)
Last Edit: Aug 12, 2017 13:17:47 GMT by BringBackBR: Bad grammar
OHLE OverHead Line Equipment, Pudding Mill Lane- to east of Whitechapel & Stepney Green junction-Abbey Wood is due to be energised from 1 October 2017. Phase 2, including Paddington, Bond Street, Tottenham Court Road, Farringdon, Liverpool Street, Whitechapel (station) is planned for February 2018.