I cannot agree with architects John Ting and Zahidi Abdul Rahman, who said that a barrier is more than sufficient to indicate areas where people should not cross over (Teen's fall sparks safety discussion; March 2).

The fact is that at the Orchard Road mall's linkway from which 17-year-old Jonathan Chow Hua Guang fell to his death, the plasterboard structure was constructed at the same level as the linkway itself.

When it has not been cleaned, it looks very much like a concrete ledge.

This makes it easy to assume it is a load-bearing structure.

Those who installed this structure should have recognised this potential danger. A "danger" sign is all that is required.

Fulfilling the requirements of regulations is only one aspect of safety.

The use of safety devices and signs alerting people in the vicinity to the danger complements the regulations.

Ho Weng Khin