(1) EN 1998-1 applies to the design of buildings and civil engineering works in seismic regions. It is subdivided in 10 Sections, some of which are specifically devoted to the design of buildings. (2) Section 2 of EN 1998-1 contains the basic performance requirements and compliance criteria applicable to buildings and civil engineering works in seismic regions. (3) Section 3 of EN 1998-1 gives the rules for the representation of seismic actions and for their combination with other actions. Certain types of structures, dealt with in EN 1998-2 to EN 1998-6, need complementing rules which are given in those Parts. (4) Section 4 of EN 1998-1 contains general design rules relevant specifically to buildings. (5) Sections 5 to 9 of EN 1998-1 contain specific rules for various structural materials and elements, relevant specifically to buildings as follows: - Section5: Specific rules for concrete buildings; - Section6: Specific rules for steel buildings; - Section7: Specific rules for composite steel-concrete buildings; - Section8: Specific rules for timber buildings; - Section9: Specific rules for masonry buildings. (6) Section 10 contains the fundamental requirements and other relevant aspects of design and safety related to base isolation of structures and specifically to base isolation of buildings. NOTE Specific rules for isolation of bridges are developed in EN 1998-2. (7) Annex C contains additional elements related to the design of slab reinforcement in steel-concrete composite beams at beam-column joints of moment frames. NOTE Informative Annex A and informative Annex B contain additional elements related to the elastic displacement response spectrum and to target displacement for pushover analysis.