IPC 2013 : E01D 101/32 : prestressed.

IPC2013 > E > E01 > E01D > E01D 101/00 > E01D 101/32[2] > prestressed.
Notes[t] E01 - E06: BUILDING
E SECTION E — FIXED CONSTRUCTIONS.
E01 CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES.
E01D BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F 1/305).
E01D 101/00 Material constitution of bridges.
E01D 101/32 · · prestressed.