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Orientation and construction of buildings should receive special attention in places where environment and climatic factors have a significant effect. 1_______. For example, flat roofs should be avoided in areas with frequent rainfalls. Snow and wind are variable loads that should be taken into account while designing a structure and its roof. 2_______. Solar radiation can be also unpleasant, but if it is controlled, it can bring many advantages. 3_______. Location and coordination of all services must also be preplanned and located on a site plan, worked out in accordance with the local climatic conditions. 4_______. All conveniences must have ventilation, a cover, partitions and doors with suitable fastenings.