| Title |
Fire Resistance Performance of Light Timber-Framed Walls Incorporating Fire-Retardant Treated Plywood |
| Authors |
조용현(Cho, Yong-Hyun) ; 류현주(Ryu, Hyeon-Ju) ; 여인환(Yeo In-Hwan) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.4.331 |
| Keywords |
Light Timber Frame Wall; Fire Resistance; Fire-Retardant Plywood; Mineral Wool; Full-Scale Fire Test |
| Abstract |
This study evaluates the fire resistance of light timber frame (LTF) non-load-bearing wall assemblies using small-scale and full-scale fire tests
to support application in mid- and high-rise timber buildings requiring a 2-hour fire rating. Small-scale tests examined the effects of
insulation type and gypsum board thickness, confirming improved performance with mineral wool insulation and thicker gypsum boards.
Full-scale tests demonstrated a clear size effect, as an increased number of joints in large gypsum boards led to earlier board failure and
reduced fire resistance. Fire-retardant plywood exhibited thermal behavior similar to gypsum board during the first 30 minutes of fire
exposure, indicating its potential for early-stage fire protection. In addition, enhanced fire resistance observed in full-scale specimens
incorporating fire-retardant plywood suggests that adhesive-bonded composite layers can reduce joint-related weaknesses. Overall, the results
show that optimized combinations of insulation and fire-retardant plywood can improve the fire resistance of LTF walls and support the
development of practical 2-hour fire-rated wall assemblies for modern timber buildings. |