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12 The frame shown consists of four wooden members, ABC, DEF, BE, and CF. Knowing that each member has a 2 x 4-in. rectan- gular cross section and that each pin has a-in. diameter, deter- mine the maximum value of the average normal stress (a) in member BE, (b) in member CF. 45 in.- 30 in.- B 480 lb 4 in. 4 in. 40 in. E D- 15 in. -- 30 in.

12 The frame shown consists of four wooden members, ABC, DEF, BE, and CF. Knowing that each member has a 2 x 4-in. rectan- gular cross section and that each pin has a-in. diameter, deter- mine the maximum value of the average normal stress (a) in member BE, (b) in member CF. 45 in.- 30 in.- B 480 lb 4 in. 4 in. 40 in. E D- 15 in. -- 30 in.

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Fig. P1.7 1.12 The frame shown consists of four wooden members, ABC, DEF, BE, and CF. Knowing that each member has a 2 x 4-in. rectan- gular cross section and that each pin has a-in. diameter, deter- mine the maximum value of the average normal stress (a) in member BE, (b) in member CF. 45 in. - -30 in.- C 480 lb 4 in. 4 in. 40 in. F D-15 in.- 30 in.
Transcribed Image Text:Fig. P1.7 1.12 The frame shown consists of four wooden members, ABC, DEF, BE, and CF. Knowing that each member has a 2 x 4-in. rectan- gular cross section and that each pin has a-in. diameter, deter- mine the maximum value of the average normal stress (a) in member BE, (b) in member CF. 45 in. - -30 in.- C 480 lb 4 in. 4 in. 40 in. F D-15 in.- 30 in.
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