Throughout the 24-hour test period, the underside of the structural deck must be continuously or periodically monitored for signs of dampness, dripping water, or structural deflection.
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Pre-1998 draft versions (not the final approved standard) sometimes circulate on government or academic websites. These are for compliance but can inform general methodology. Search: "D5957" filetype:pdf on Google Scholar or government domains (.gov). Throughout the 24-hour test period, the underside of