3 PRINCIPLES OF THE CONTEMPORARY DIAGRID STRUCTURE CONCEPT AND DEFINITION EXPLORING THE POSSIBILITIES OF DIAGRID SYSTEMS MATERIAL CHOICES STRUCTURAL BENEFITS THE FIRST CONTEMPORARY DIAGRID BUILDINGS —PROJECT PROFILE: LONDON CITY HALL | FOSTER + PARTNERS, ARUP —PROJECT PROFILE: SWISS RE TOWER | FOSTER + PARTNERS, ARUP —PROJECT PROFILE: HEARST MAGAZINE TOWER | FOSTER + PARTNERS, WSP CANTOR SEINUK
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