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Alternative angle

New Concrete Engineering

To provide continuity of reinforcement to the newly cast edge sections, threaded bars were spliced onto the previous pour, leaving the area free for tensioning.

Canopy connections are formed by fabricated IPE (square ended) I sections running along the edge of the slab which assist in distributing the loads. The slab has zig-zag edges which are reinforced by two layers of four T16 bars running along them surrounded by T12 links set into the concrete.

Where the main steel rebars cross this edge reinforcement they sit on the links at an angle.

'We had various schemes but the one we came up with had to be flexible enough so you could get the angle you wanted, and to have room to weld connections onto it, ' says IDOM structural design engineer Miles Shephard.

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