Usage of spatial lattice metal structures as roofing for mechanical equipment rooms of hydroelectric power stationsMikhail Balzannikov, Vadim Alpatov, Igor Kholopov, Andrey Saharov and Aleksey LukinMATEC Web Conf., 73 (2016) 01012DOI: https://doi.org/10.1051/matecconf/20167301012