Twisted Steel Micro-Rebar in load carrying concrete walls

Historically, many walls have been constructed of plain concrete. Modern codes, however, only allow plain concrete walls to be used in limited circumstances, where the walls are inherently stable.  Reinforced walls are designed according to ACI 332-14 using rebar to increase their structural capacity.  An alternative way to reinforce concrete walls is by using twisted steel micro-rebar (TSMR). TSMR reinforced concrete refers to concrete reinforced with short, randomly oriented twisted steel filaments.