Overturning
Structural stability analyze should be done using the WSD with a safety factor against overturning of 2. Clause 6.5.1.
Shoring height to width ratio
The height of the shoring tower divided by the width of the tower should not be greater than 3. Additional bracing between the towers of the same shoring system can be use to ‘increase’ the width of the tower and reduce the ratio below 3. Clause 6.5.2.3