The video clips and pictures of the walkway shelter that collapsed after a lorry hit it raise the question of how it could have happened ("Lorry driver held over collapse of walkway shelter"; last Saturday).

To a layman like me, the uprooted support pillar and its base appear insufficient to support a walkway shelter of such length and weight.

If, for instance, a car had swerved to avoid a pedestrian and crashed into the pillar, would the pillar have been able to withstand the impact?

Is the construction of walkway shelters subject to any weight-load calculations and regulations?

Are the current parameters enough so that injuries would be minimised as much as possible?

Annie Ng Lee Hoon (Ms)