*François Hennebique, a French contractor who obtained an English patent in 1892 for his system which would find wide use in Britain.

Hennebique's patent was based on plain round bars with fish-tailed ends and stirrups of flat straps, all at that time being of mild steel.

The bars provided tensile resistance in beams and slabs, and supplemented the compressive capacity of the concrete in columns and walls.

The stirrups provided shear resistance, although not mechanically anchored in the compression zone, as is the norm nowadays.

Strips of wire linked column bars.

A later development in 1897 was to provide bent up bars in beams to provide hogging resistance and supplement shear capacity.

Sources of Information

1. Proceeding Institution Civil Engrs Structs and Bldgs, 1996: Paper 11068 "The Era of the Proprietary Reinforcing Systems"

2. Proc. Suffolk Inst of Archaeology Vol VIII (1894) "Ballingdon Bridge and the Sudbury Stour by William Walter Hodson"