The subject of this final work is analysis of the roof construction lattice girder. This final work contains the description of the industrial aluminum usage and based on that, the calculation for roof construction of the engineered hall was made. In the continuation of this final work the static calculation of an engineered hall is presented and it contains metal truss capacity, construction and appointed roof weight, calculation of variable loads, as the snow and the wind. After selecting the critical load, the sizing of roof Sveučilišni odjel za stručne studije Strojarstvo 4 construction has been done so that minimal satisfying profile weight conditions are satisfied, as well as the choice of optimal economical profile. The aluminum alloy EN AW 6060 T66 has been defined by project task (problem) and satisfying aluminum profiles chosen. After the defining of latticed roof truss profile, necessary calculation of bolted and welded contact in the construction knot has been made. Finally, there is the comparison of steel and metal construction, as well as the conclusion of this final work.