It is a pre-stressed concrete box girder bridge.
Concrete
The current bridge is made of pre-stressed concrete.
The current London Bridge is a pre-stressed concrete box girder bridge.
The present London Bridge is a pre-stressed concrete box girder bridge.
The present London Bridge is built using pre-stressed concrete.
Stick and stone,wood and clay,iron and steel, the last one is brick and cement
The present London Bridge is a pre-stressed concrete box girder bridge.
The current (1973) bridge is a prestressed concete box girder bridge.
Pre-stressed concrete.
It hasn't. The current London Bridge is made of pre-stressed concrete.
Thr current London Bridge is a pre-stressed concrete box girder bridge.
The current London Bridge (1973) was built by a consortium of civil engineering contractors.
The current bridge was built in 1973