JOURNAL

Layanan journal yang disediakan oleh Perpustakaan Universitas Gunadarma

Potential Thermal Degradation of Attic Framing and Wood Sheathing

Judul Artikel:Potential Thermal Degradation of Attic Framing and Wood Sheathing
Judul Terbitan:Practice Periodical on Structural Design and Construction
ISSN:10840680
Bahasa:ENG
Tempat Terbit:Reston
Tahun:0000
Volume:Vol. 8 Issue 4 0000
Penerbit:ASCE
Frekuensi Penerbitan:Triwulan
Penulis:Jason V. Smart; Frank E. Woeste, P.E; Joseph R. Loferski
Abstraksi:The process of thermal degradation of wood products was reviewed in the context of the molecular constituents of wood— cellulose, hemicellulose, and lignin. Test data on 2 X 4 lumber subjected to 66°C (150°F) for 48 months were reviewed, and the loss of strength as measured by modulus of rupture was reported to be 32%. The basics of heat transfer in attics were reviewed and test data onsimulated attics in several locations were summarized. It was noted that thermal degradation is a cumulative process, dependent upon bothtemperature and duration of exposure. The effect of combined temperature and duration on potential thermal degradation of attic framingand sheathing can be minimized at the design stage by specifying light-colored shingles and roof details that provide for maximum atticventilation. Through the use of a continuous soffit and ridgeline ventilation system, peak attic temperatures from solar radiation will bereduced and thus significant thermal degradation of attic framing and sheathing should be unlikely during the life of the roof structure
Kata Kunci:: Thermal factors; Degradation; Wooden structures; Ventilation; Building frames.
Lokasi:p. 203
Terakreditasi:belum