Support wall collapses, five workers sent to hospital - CALGARY (Canadian OH&S News)
The cause of the collapse is unknown at the moment, Harrison says, but he surmises that the workers were putting all the rebar sections together when the accident occurred.
There are no general procedures for creating a rebar wall, says Roy Silliker, general manager of the New Brunswick Construction Safety Association in Miramichi, New Brunswick. “Each employer has job procedures and safe work practices that he follows,” Silliker says. “He has to develop those procedures [based] on what he’s doing.”
Employers, however, need to take wall thickness, height and narrowness into account, as well as the strength of concrete and backfill requirements, or approved filling material (such as soil) used above cover material and below the original ground.