Chapter 5 of NFPA 92 outlines the calculation procedures related to smoke management. It often helps to develop several fire scenarios to determine a conservative, yet reasonable, fire situation and ensure the smoke control system can operate effectively under a variety of circumstances. Special consideration should be given to the design fire, including likely fuel materials, location, intensity, and growth. A number of techniques including hand-calculation methods, scale models, or computer models can be employed at this stage. Once the general design requirements are established, the next step is to perform the design calculations. The criteria may apply to one or both of the smoke control methodologies and can help assess the effectiveness of a smoke control system they can be found in Section 4.4 of NFPA 92. The report should also document the next step, establishing the design criteria. Keeping the design basis in mind, the smoke control approaches should be clearly defined and documented from the beginning.
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