Steel trusses pre-engineered pre-engineered steel truss systems for roof or floor designed and prefabricated for you project in any location saving on labor and time for your project. complex or simple configurations you will see a benefit with faster production and lower cost.. Colorbond steel shed for sale � 3.75 x 1.5 x 2.0 � 2.5m height. with a classic gable roof design and reinforced steel truss roof, this shed affords excellent storage volume. perfect for your handyman workshop or storage needs. wildern. Roof kit of 8