ABSTRACT
Structural steel – tension members 11% Man made Flexure of reinforced concrete – Grade 60 11% Flexure of reinforced concrete – Grade 40 14% Flexure strength of wood 19% Nature resistance Standard penetration test 26% Field testing Soils – unit weight 3% Nature Friction angle – sand 12% Natural water content (silty clay) 20% Undrained shear strength, Cu 40% Compression index, Cc 30%
◦ Coefficient of variation (%) = Standard deviation/Mean. ◦ For a wind loading expect COV > 25%.
