Part 1: Architect’s Guide 1 - 8 It is easy to remove components, to replace and modify spans, to change beam or column dimensions. The ability to suspend building floors from roof structures offers additional flexibility for new projects associated with existing buildings. It is also worth noting that the lightness of steel structures is a distinct advantage when adding new floors by means of connections to existing structures (once their potential has been verified). If new foundations are required for the installation of new structures, these can be designed easily and in such a way that they do not interfere with existing foundations. The restructuring of relatively old buildings (such as that shown in Figure 2.6) always requires work to ensure compliance with current standards. It can involve: Emergency exits Increase in movement Installation of ventilation and smoke ducts Fire and corrosion protection of steel elements Reinforcement for new loads New means of access. Figure 2.6 Headquarters of Nestlé France, Noisiel
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