In main plant building with lateral bunker bay,the turbine building is single bent frame building with large span;and the bunker bay is single frame with large span.

This paper analyzes on the influence of the direct air-cooling system of the steam-power plant on the ventilation system of the steam engine room, probes into the feasibility of several ventilating modes of the direct air-cooled unit for the steam engine room, and connecting with the concrete situation of a certain steam-power plant, puts forward the design scheme.

Through the practice of the r oof engineering of Wuyang Steam-power Plant this paper expounds the superioriti es of adopting the grid structure on the roofs of the steam engine room and the .