For the beam in figure 1, find the value and location of the largest tensile and compressive stresses. There may be more than one candidate location for each of these. 3.2. kN/m + 1.9 kN.m im A A 3m Figure 1 2m Figure 2 The cross section shown in Figure 2 is 125x75x8 UA the cross section and material properties are shown below; (Note that in the tables, the horizontal and vertical coordinate n and p, and are right and up respectively. Table 26 Unequal Angles - x-axis and y-axis - Dimensions and Properties Designation Nominal Mass Actual Thickness per Thickness metre Radii Gross Coordinate Area of of Centroid Cross Root Toe (b-t) (b,-t) Section About x-axis About y-axis Torsion Tan Designation Constant Alpha Leg-size b, x b₁₂ t tt mm mm mm ka/m mm mm mm A mm² 125 x 75 x 12 UA 17.7 12.0 10 UA 14.2 9.5 8 UA 11.8 7.8 8.0 5.0 9.42 5.25 2260 8.0 5.0 12.2 6.89 1810 8.0 5.0 15.0 8.62 1500 PB 1 mm mm 10 mm 43.3 18.4 3.91 83.2 42.3 17.5 3.20 83.8 41.5 16.8 2.68 84.2 V₁ mm Z V₁ Ys 10'mm³ mm 10°mm³ mm 47.0 59.7 65.5 34.6 38.2 59.3 53.9 33.9 31.8 58.9 45.5 33.3 Z S₁ X3 Z S₁ J 10 mm² 10°mm³ mm 10 mm mm 10 mm mm 10°mm³ mm 113 81.4 41.6 0.585 19.9 29.3 41.4 14.1 31.9 10 mm² 10'mm³ mm 18.4 29.7 16.1 10 mm 94.4 65.8 42.0 0.476 19.2 24.9 41.6 11.4 30.7 15.5 24.1 16.2 80.4 54.6 42.2 0.399 18.6 21.5 41.8 9.55 29.9 13.3 20.1 16.3 110 56.2 0.360 31.7 0.363 0.356 125 x 75 x 12 UA 10 UA 8 UA Table 27 Unequal Angles - x-axis and y-axis - Properties for Assessing Section Capacity Designation Yield Stress Form Factor About x-axis Load A About y-axis Yield Stress Form Factor About x-axis About y-axis Designation mm mm mm f MPa Za Load C Z Load B Load D Load A Load C Load B Z Z Z Z Load D Z 10³mm³ 10 mm³ 10'mm³ 10³mm³ MPa 10 mm³ 10 mm³ 10³mm³ 10 mm 300PLUS** AS/NZS 3679.1-350 125 x 75 x 12 UA 300 1.00 68.6 70.5 20.6 21.2 340 1.00 67.6 70.5 20.3 212 125 x 75 x 12 UA

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.