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ANCHORING THE REINFORCEMENT OF THE UPPER FLOOR LEVEL

Column rebar must be properly anchored to the upper floor level in order to behave in the re-quire way.

The most effective way to anchor the upper floor column rebar is by creating a “concrete hat” on the summit of the column thus allowing the rebar to be anchored without being bent.

If the construction of a ‘column hat’ is not a enviable solution due to reasons like e.g. the need for a flat roof, then the column rebar of the upper floor can be anchored according to one of the following ways:

(a) Hooks bent at 180°

(b) Hooks bend at 90° (case A)

(c) Hooks bend at 90°(case B)

(d) Use of additional hairpin reinforcement bent at 90° or 180°

(e) When placing small bar diameters inside high-strength concrete mixtures, the straight an-chorage length might be short sufficient to fit within the joint area.