PROBLEM 4 Find the maximum allowable value of p and working Aresses are steel: 120= timber : =1 Concrete: 2P x 10 500 = 30 kN 12 = P x 10 3 2000 = 24 kN 3 16 = 5 PX 10" 8000 25.6 KN for the column. The shown in the figure. be P steel: A = 500 mm tw = 120 MPa Timber: 2 A = 2000 mm Ow = 12 MPa concrete: A 8000 mm ² Ow= 16MPA £29 12p tp 45 P 15 5P cross-sectional areas 2P TP timber

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.