목조용 최대허용지간거리계산기 장선과 서까래

 

목조용 최대허용지간거리계산기 장선과 서까래  

나무수종	Aspen Baldcypress Beech-Birch-Hickory Cottonwood Douglas Fir-Larch Douglas Fir-Larch (North) Douglas Fir-South Eastern Hemlock-Balsam Fir Eastern Hemlock-Tamarack Eastern Softwoods Eastern White Pine Hem-Fir Hem-Fir (North) Mixed Maple Mixed Oak Mixed Southern Pine Northern Red Oak Northern Species Northern White Cedar Red Maple Red Oak Redwood Southern Pine Spruce-Pine-Fir Spruce-Pine-Fir (South) Western Cedars Western Woods White Oak Yellow Poplar
목재사이즈	2x4 2x6 2x8 2x10 2x12
목재등급	Select StructuralNo. 1No. 2No. 3StudConstructionStandardUtility
목재사용부위	Floor Joists Ceiling Joists Rafters (Snow Load) Rafters (Roof Live-Load)
처짐한계	L/720 L/600 L/480 L/360 L/240 L/180
목재설치간격 (in)	12 16 19.2 24
외부노출등급	비에노출되는장소인가? No Yes 방부처리를 했는가? No Yes
활하중 (psf)	30405060708090100
사하중 (psf)	5 7 10 15 20

Designed by Cameron Knudson and David Pollock. provided by American Wood Council

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