The Christian Revival Church (CRC) seating accommodates
4 500 congregants and is enclosed with a curved structural steel roof consisting of triangular radiused roof trusses spaced 10m apart over an area of 80m x 68m. The seven unique structural steel triangular space frame ‘Toblerone” trusses are manufactured from circular hollow sections with varying spans up to 50m.
The auditorium roof structure was analysed using the Prokon frame analysis program with loading modelled in 20 different load combinations. The Toblerone trusses which span across the entire main auditorium building, are supported by reinforced concrete columns with corbels at each end of the trusses as well as by an intermediate reinforced concrete ring beam. The top chords, which under most load combinations are in compression, are braced together with horizontal circular members. The trusses are roughly 1.9m deep and 2.4m wide in plan and are curved to provide a curved roof profile and suitable slope for rainwater