Week 05 Summary
Column
Buckling Direction
Engineered Timber Solid products: LVL, glulam, CLT Sheet products: plywood, MDF, chipboard & strandboard Other manufactured products: I beam Box beams Timber flanged steel web joist
>1:12 short Crushing <1:12 Long Buckling
Wall System Structural Frame: concrete frame, steel frame,timber frame(post&beam) Load Bearing Wall: concrete Masonry – reinforced cavity solid
Stud Wall: light gauge steel framing, timber framing, stud framing (top plates/ vertical studs/ noggins/ cross bracing/ ply bracing), Brick veneer (1skin-non structural masonry + 1 skin structural frame wall)
Wood to Timber Early wood – rapid growth, large cells, light color. Late wood – slow growth, lack of water, dark color. Growth – one ring per year Grain Direction: strong parallel&stiff parallel
Weak perpendicular to grain Seasoning – process of removing water from wood - 15% moisture contends. •To adjust moisture Soft wood Hard wood: Quarter sawn •Provide stability Radiata pine Ash Cypress pine Gum Back sawn •Air drying – cheap, slow Hoop pine Jarrah •Kiln drying – 20-40hrs to dry to 12% Dounglass fir Oak Radial sawn •Solar kiln – less expensive Balsawood KNOTS – WEAK POINT