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Blade Columns by OZM Wall

Blade Columns

Blade columns are really walls and are designed under the wall section of the concrete code.

Once the length of the column is at least 4 times the thickness is can be designed as a wall with a significant reduction in reinforcement.

Blade walls replace columns particularly in high rise residential construction where a long skinny column provides a better architectural solution.

Horizontal reinforcement is added at the factory and the ends of the blade are closed. The blade column is then dropped through a slot in the floor formwork and then vertical bars are added prior to concrete filling. Propping is eliminated and site labour is reduced by 70%.

A typical blade column is 1200mm long by 250mm thick but this can be increased up to 268mm thick and 4m long.

Reinforcement savings of at least 50% are achieved over conventional columns.