Question (1): Draw the shearing force and bending-moment diagrams for the beam and loading shown, Determine: (a) The maximum absolute value of the shearing force, 2ft (b) The max positive bending moment, B.M. (c) The max negative bending moment, B.M. P = 15 kips Max Shearing Force = . w=8 kips/ft M=25 kip.ft Max Positive B.M. A 16 ft 2f2f2ft B2 B Max Negative B.M. =

An I beam whose flange width is 357mm, flange thickness is 15mm, web thickness is 20mm, total depth of 450mm and Fy of 248MPa is to be used to carry a uniform load all throughout its length, 3m. 1. What is the allowable bending stress? a. 153.69 MPa b. 161.75 MPa c. 192.69 MPa d. 168.23 MPa 2. Determine the moment of inertia of the section.  a. 0.732 x 10⁹ mm⁴ b. 0.517 x 10⁹ mm⁴ c. 0.630 x 10⁹ mm⁴ d. 0.810 x 10⁹ mm⁴ 3. What is the maximum safe uniform load that the beam could carry?  a. 402.58 kN/m b. 164.6 kN/m c. 476.56 kN/m d. 541.6 kN/m

Working stress design method 3/ By using the working stress design method find the maximum flexural moment can be carried by the cross sections of reinforced concrete beams of details shown in Figures a,b, and. Use fs=165 MPa, fc-12.5 MPa and n=8. 100mm 200mm 3025mm 400 mm - C 500 mm - 250 mm 4020mm b 100 mm 400mm 150 mm 500 mm 75 mm 75 mm

/stemezcom Lec3 working stres For the beam shown below, determine the concrete and steel stresses at the locations of the maximum positive and negative moments, Use ſ'c = 25Mpa. The answers are MPa, MPa, MPa and MPa. 3okN/m 8m 1m 4-25mmØ- -Top bars -4-16mmØ 250 250 bottom bars 630 630