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Books Books 1 - 1 of 1 on The piers supporting the roof structure are separate from the armoured wall. The....
" The piers supporting the roof structure are separate from the armoured wall. The roof is of the usual girder construction, and bomb-proof throughout. There is to this, and to all the other sea forts, an entrance port into which, in preparing for action,... "
Professional Papers of the Corps of Royal Engineers - Page 283
by Great Britain. Army. Royal Engineers - 1882
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Brassey's Annual: The Armed Forces Year-book

Earl Thomas Allnutt Brassey - Armed Forces - 1886
...port, and three supported by massive armour bars on edge elsewhere (vide Fig. 3, PI. IX.). The piers are separate from the armoured wall. The roof is of...preparing for action, a massive armoured shield on wheels is run, and over the entrance is a very strong cantilever beam for hoisting the guns and other...
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