The rule I was always taught is to cross any 'step' - up or down - at an angle with the elevator full back:

• It minimizes the chance of a prop strike, which is much more expensive than a wingtip strike
• When going 'up', you avoid having both wheels up against the step at the same time, which usually means you need a burst of power to get over it, which could lead to sudden acceleration and sharp braking
• When going 'down' you avoid the aircraft dropping down suddenly, with the sames risks of strikes or an increase in speed
• Lifting the elevator reduces the chance of it striking

There may be some differences for specific aircraft types, but I've always followed that advice and never had a problem. I've also never seen an aircraft get close to a wingtip strike doing this, but I suppose it could happen if the step is large enough. Although in that case you might want to just find another taxi route.

The rule I was always taught is to cross any 'step' - up or down - at an angle with the elevator full back:

• It minimizes the chance of a prop strike, which is much more expensive than a wingtip strike
• When going 'up', you avoid having both wheels up against the step at the same time, which usually means you need a burst of power to get over it, which could lead to sudden acceleration and sharp braking
• When going 'down' you avoid the aircraft dropping down suddenly, with the same risks of strikes or an increase in speed
• Lifting the elevator reduces the chance of it striking

There may be some differences for specific aircraft types, but I've always followed that advice and never had a problem. I've also never seen an aircraft get close to a wingtip strike doing this, but I suppose it could happen if the step is large enough. Although in that case you might want to just find another taxi route.