AS 4744.1-2000 pdf free download.Steel shoring and trench lining equipment - Part1:Design. 1.1 SCOPE This Standard specifies the requirements for steel shoring and trench lining systems assembled completely from prefabricated components. It includes requirements for the design. construction and intended use of such systems. 1.2 APPLICATION This Standard applies to all new shoring and trench lining systems. All systems shall...