How can you choose between performance-based and prescriptive codes in construction?

1 What are performance-based codes?

Performance-based codes are building codes that specify the desired outcomes or goals of a building, rather than the specific methods or materials to achieve them. For example, a performance-based code might state that a building must resist fire for a certain period of time, but not how to achieve that fire resistance. Performance-based codes allow more flexibility and innovation in design and construction, as long as the performance criteria are met.

3 What are the advantages and disadvantages of performance-based codes?

Performance-based codes have both advantages and disadvantages when compared to prescriptive codes. On the one hand, they can encourage innovation and creativity in design and construction, as they allow different solutions to meet the same performance goals. They can also adapt to changing technologies, materials, and practices, as they are not tied to specific methods or standards. In addition, they can reduce costs and waste, as they allow for the use of optimal materials and methods for each project. On the other hand, performance-based codes require more expertise and analysis in design and construction, as they involve complex calculations and simulations to demonstrate compliance with the performance criteria. They can also increase risks and liabilities, as they rely on the judgment and responsibility of the designers and contractors to ensure that performance goals are met. Furthermore, they can create confusion and inconsistency in enforcement and inspection, as there may not be clear or objective criteria to verify compliance.

4 What are the advantages and disadvantages of prescriptive codes?

Prescriptive codes have both advantages and disadvantages compared to performance-based codes. On the plus side, they provide clarity and simplicity in design and construction, as well as uniformity and quality, due to their clear requirements and established methods. Additionally, they make compliance and inspection easier, as they have measurable criteria to check. However, prescriptive codes also limit innovation and creativity in design and construction, as they restrict the use of alternative solutions or materials. Furthermore, they can become outdated and inefficient, since they may not reflect the latest technologies or practices. Lastly, they can increase costs and waste due to the use of unnecessary or excessive materials or methods for some projects.

5 How can you choose between performance-based and prescriptive codes?

When deciding between performance-based and prescriptive codes, several factors must be taken into account, such as the type, scope, and complexity of the project, the availability and cost of materials and methods, the expertise and experience of the design and construction team, the expectations and preferences of clients and stakeholders, and the regulations and standards of your jurisdiction. To make an informed decision, consider the benefits and drawbacks of each code for your project in terms of goals, budget, and schedule. Additionally, consult with your design and construction team to assess their capabilities and preferences. Communicate with your clients to understand their needs in terms of performance, quality, and safety. Lastly, research the regulations in your jurisdiction to determine which type of code is mandatory, optional or recommended for your project.