Steel Buildings in Europe

Part 2: Concept Design 2 - 29 Figure 3.15 Typical bracing connections 3.6 Other types of portal frame The features of an orthodox portal frame were described in Sections 3.1 to 3.5. The basic structural concept can be modified in a number of ways to produce a cost effective solution, as illustrated below. 3.6.1 Portal frame with a mezzanine floor 1 1 Mezzanine Figure 3.16 Portal frame with internal mezzanine floor Office accommodation is often provided within a portal frame structure using a mezzanine floor (as illustrated in Figure 3.17). The mezzanine floor may be partial or full width. It can be designed to stabilise the frame. Often, the internal floor of the office space requires fire protection.