Chamber step irons for concrete structures

Notes

Fitting to new or existing structures

1. Drill two 22mm diameter holes, at 320mm centres, at least 90mm deep.
2. Ensure that the holes are parallel and not at right angles to a circular shaft. This is important for double steps to avoid the step being stressed when fitted.
3. Remove dust from hole and apply cementitious or epoxy grout with a compressive strength equivalent to the concrete tails of steps and inside holes.
4. Hammer the step on each leg to drive into holes evenly. Do not hammer the step in the centre as this causes rebound.
5. Make good any spoiling and do not use the step until the grout/epoxy has set or cured.