Temporary Hoardings require structural design by Structural Engineers to comply with AS/NZS 1170.

As was recently seen on a Wellington construction site, temporary construction hoardings dislodged injuring a pedestrian. It is important to consider external wind pressures on hoardings, but also internal wind pressures and suction forces.

http://www.stuff.co.nz/dominion-post/68317193/building-site-wall-flies-i...