a) The truss in Figure 2-1 consists of four wooden members, ABC, DEF, BE, and CF, which supports load at C. Knowing that each member has 2 x 4-in rectangular cross section and that each pin has a ½-...

Extracted text: a) The truss in Figure 2-1 consists of four wooden members, ABC, DEF, BE, and CF, which supports load at C. Knowing that each member has 2 x 4-in rectangular cross section and that each pin has a ½- in diameter, determine the maximum value of the average normal stress in members BE and CF. 30 in 480 Ib 4 in 4 in 40 in P-15 in-- 30 in Figure 2-1