Platform Bolt
From TrigpointingUK
A platform bolt is a type of type of triangulation mark. It comprises a large concrete platform with a centrally-placed bolt. This may often be positioned in a hedgeline or raised field boundary. 24 instances are recorded in T:UK, located in North Wales and South West England. In OSGB36 the mark is classified as a bolt but qualified as 'bolt in platform' in the comment field. Platform Bolts were re-used in the passive station era. All marks are of order 3.
T:UK | Station name | Order | Computed | Block |
---|---|---|---|---|
TP8098 | Cae Hir | 3 | 1956 | SH62 |
TP8517 | Gwydd Gwion | 3 | 1956 | SH62 |
TP7660 | Corlan-Fraith | 3 | 1956 | SH62 |
TP8092 | Garn Bodvean | 3 | 1956 | SH62 |
TP8229 | Peppershill | 3 | 1949 | SS30 |
TP7643 | Carcade Farm | 3 | 1955 | SX06 |
TP7644 | Treore | 3 | 1955 | SX06 |
TP7647 | Middle Taphouse | 3 | 1955 | SX06 |
TP7534 | Burniere Farm | 3 | 1955 | SX06 |
TP7645 | Grey Mare Hill | 3 | 1955 | SX06 |
TP7492 | Castle Canyke | 3 | 1955 | SX06 |
TP7646 | Beacon Hill | 3 | 1955 | SX06 |
TP7819 | Trevollard | 3 | 1955 | SX06 |
TP8077 | Torfrey Hill | 3 | 1955 | SX06 |
TP7684 | Trenarren | 3 | 1955 | SX06 |
TP7533 | Hendra Farm | 3 | 1955 | SX06 |
TP7490 | Polstain Farm | 3 | 1955 | SX06 |
TP8098 | Cae Hir | 3 | 1956 | SH62 |
TP8517 | Gwydd Gwion | 3 | 1956 | SH62 |
TP7660 | Corlan-Fraith | 3 | 1956 | SH62 |
TP8092 | Garn Bodvean | 3 | 1956 | SH62 |
TP8229 | Peppershill | 3 | 1949 | SS30 |
TP7643 | Carcade Farm | 3 | 1955 | SX06 |
TP7644 | Treore | 3 | 1955 | SX06 |
TP7647 | Middle Taphouse | 3 | 1955 | SX06 |
TP7534 | Burniere Farm | 3 | 1955 | SX06 |
TP7645 | Grey Mare Hill | 3 | 1955 | SX06 |
TP7492 | Castle Canyke | 3 | 1955 | SX06 |
TP7646 | Beacon Hill | 3 | 1955 | SX06 |
TP7819 | Trevollard | 3 | 1955 | SX06 |
TP8077 | Torfrey Hill | 3 | 1955 | SX06 |
TP7684 | Trenarren | 3 | 1955 | SX06 |
TP7533 | Hendra Farm | 3 | 1955 | SX06 |
TP7490 | Polstain Farm | 3 | 1955 | SX06 |
TP7682 | Goviley Major | 3 | 1955 | SX06 |
TP7686 | Polwhele Farm | 3 | 1955 | SX06 |
TP7685 | Camerance Farm | 3 | 1955 | SW63 |
TP8075 | Four Acres | 3 | 1955 | SW63 |
TP8073 | New Downs | 3 | 1955 | SW63 |
TP8074 | Wheal Mount | 3 | 1955 | SW63 |
TP8072 | Hingey | 3 | 1955 | SW63 |