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Abstract
Since 1989, BOCA magazine has carried several articles on fire-retardant plywood that told of emerging problems and cited early reports of roof sheathing failure resulting from the effects of some fire retardant chemicals or treatment systems on wood. Also, an article in our July/Aug 1989 issue raised a red flag about the potential for deterioration of FRT lumber used as joists, rafters and truss members. Updating this situation, the following article cites roof truss and rafter system failures that may be only the "tip of the icerberg" as dimensional framing is now beginning to show signs of premature degradation first experiencede by FRT plywood, and offers advice on early detection that could help limit damage.
Since 1989, BOCA magazine has carried several articles on fire-retardant plywood that told of emerging problems and cited early reports of roof sheathing failure resulting from the effects of some fire retardant chemicals or treatment systems on wood. Also, an article in our July/Aug 1989 issue raised a red flag about the potential for deterioration of FRT lumber used as joists, rafters and truss members. Updating this situation, the following article cites roof truss and rafter system failures that may be only the "tip of the icerberg" as dimensional framing is now beginning to show signs of premature degradation first experiencede by FRT plywood, and offers advice on early detection that could help limit damage.
Date
3/1994
3/1994
Author(s)
Page(s)
2-3
2-3
Keyword(s)
roof truss; rafter failure; FRT plywood
roof truss; rafter failure; FRT plywood