MASS OF COMMON WOOD SPECIE (US / CANADIAN SPECIE)
Wood – seasoned & dry
kg/cu.m
Afromosia
705
Apple
660 – 830
Ash, black
540
Ash, white
670
Aspen
420
Balsa
170
Bamboo
300 – 400
Birch (British)
670
Cedar, red
380
Cypress
510
Douglas Fir
530
Ebony
960 – 1120
Elm ( English )
600
Elm ( Wych )
690
Elm ( Rock )
815
Iroko
655
Larch
590
Lignum Vitae
1280 – 1370
Mahogany ( Honduras )
545
Mahogany ( African )
495 – 850
Maple
755
Oak
590 – 930
Pine ( Oregon )
530
Pine ( Parana )
560
Pine ( Canadian )
350 – 560
Pine ( Red )
370 – 660
Redwood ( American )
450
Redwood ( European )
510
Spruce ( Canadian )
450
Spruce ( Sitka )
450
Sycamore
590
Teak
630 – 720
Willow
420
US Timber Engineering Properties
http://www.dot.ca.gov/hq/esc/techpubs/manual/bridgemanuals/bridge-design-specifications/page/section13.pdf
Structural Analysis – Step 4
Step 4
Draw Load tributary areas on the frame-line diagram. Compute Area and the corresponding loading at the beam.
Tributary Area at the selected/highlighted beam
You can create your own Load computation module/spreadsheet.
Structural Design Step by Step
STEP 1
Analyse structure’s trusses using Wind Load Analysis.
STEP 2
Compute Truss Member forces and Reaction at Supports
STEP 3
Trace the Structural Framing to 3D Line Diagram.
More to come at my next blog
Steel Properties for STAAD
Steel
Weight density: 490 lb/ft^3
Mass density: 15.2 slugs/ft^3
Modulus of elasticity: 28000-30000 ksi
Shear modulus of elasticity: 10800-11800 ksi
Yield stress: 50-150 ksi
Ultimate stress: 80-180 ksi
Percent elongation: 5-25 in.
Coefficient of thermal expansion: 8.0 10^-6/F
Credit: Mechanics of Materials by: James M. Gere
Timber values as reference for STAAD
Timber
Weight density: 5.5 KN/m3(DF)
Modulus of elasticity: 11000000 KN/m2
Shear modulus of elasticity: 0(DF), 0(YP)
Yield stress: 5-8 ksi(DP), 6-9ksi(YP)
Ultimate stress: 8-12 ksi(DF), 8-14 ksi(YP)
Percent elongation: 0(DF), 0(YP)
Coefficient of thermal expansion: 0(DF), 0(YP)
Mass values of Wood commonly used in Construction
Wood (seasoned & dry) – values are in kg/cu.m
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