For trusses spanning how many feet or greater must the owner contract with a registered design professional?

The requirement for an owner to contract with a registered design professional for trusses typically arises from safety and engineering standards. In many building codes, trusses that span a significant distance, which is often recognized as 60 feet or greater, necessitate professional input to ensure structural integrity, load management, and compliance with local laws.

When trusses are designed for larger spans, the complexities increase, which can involve detailed calculations and advanced engineering that often exceed what a general contractor may be able to manage safely. Having a registered design professional ensures that the design aligns with safety standards and building codes, thus helping to mitigate risks associated with structural failure.

The choice of 60 feet specifically reflects a common threshold used in various regulations and is consistent with many jurisdictions' requirements. By engaging a professional for such spans, owners are better protected from potential liability and structural issues down the line.