Robbers entered the strong room by cutting the roof slab
. Six lockers have been damaged.
The closed portion of the underpass has been constructed by top down construction technique; 93m x 27m roof slab
of the closed portion contains 42 nos of void forms embedded.
The four columns are pulled out beyond the outer edges of a rectangular building platform and articulated at the joints with the roof slab
which, in turn, is sculpted and made thin at its outer edges.
Working in close quarters -- and 20-feet above the roof slab
-- Rosenwach successfully welded the sections together, installed new shut-off valves and electrical controls.
With its spare, rational geometry and slender concrete roof slab
supported on regimented lines of columns, it also owed a clear debt to lberian Modernism.
The small building has a simple steel structure with a concrete roof slab
. Columns are set back from the perimeter and the double skin is stiffened by extruded aluminium wind-bracing posts.
As there are no intermediate floors within the central public area of the box to carry lateral loads, two rows of raking, aerofoil-shaped concrete columns 13m high act like trusses, supporting the roof slab
For reasons of speed, economy and fire resistance, reinforced concrete was used for the structural frame which has a raked roof slab
and circular columns 514.