Scaffolding should always be erected by a trained and competent person. With the availability of many proprietary modular systems on the market there is a belief in some quarters that the systems are so simple that even unskilled workers with no experience or training can safely erect a scaffolding. This view is completely incorrect. Inexperienced operatives are likely to injure themselves and improperly constructed scaffolding can cause catastophic accidents. Simple omissions like bracing or handrail can seem trivial to the untrained operative, but can result in very serious accidents and cause injuries or even fatalities.