28 



PROBLEMS IN STRENGTH OF MATERIALS 



231. A trapezoidal section, if the depth is 8 inches, the longer base 

 6 inches, and the shorter base 4 inches. 



232. A section like Fig. 25, if d = 12 inches, t \ inch, and each 

 angle section 4 x 3 x \ inches, with the longer leg horizontal. 



233. A section like Fig. 25, if d 10 inches, t = \ inch, and each 

 angle section 3 X 21- x ^ inches, with the longer leg horizontal. 



234. A section like Fig. 25, if d 10 inches, t = | inch, and each 

 angle section 5 X 3|- X | inches, with the longer leg horizontal. 





_1 <= 



FIG. 25 



FIG. 26 



i 



FIG. 27 



FIG. 28 



335. The section of Fig. 26, if d = 14 inches, t = J- inch, and each 

 angle section 3 J X 3J- x J- inches. 



236. The section of Fig. 26, if d = 12 inches, t = ^ inch, and each 

 angle section 4 x 4 x J- inches. 



237. A section like Fig. 27, if l> = 8 inches, t = J- inch, and each 

 channel is 6 inches deep and weighs 8 pounds per foot. Find also the 

 moment of inertia in respect to the axis 22. 



238. A section like Fig. 27, if b = 10 inches, t = J- inch, and each 

 channel is 8 inches deep and weighs 11.25 pounds per foot. Find also 

 the moment of inertia in respect to the axis 2-2. 



239. A section like Fig. 27, if b = 12 inches, t\ inch, and each 

 channel is 10 inches deep and weighs 30 pounds per foot. Find also 

 the moment of inertia in respect to the axis 2-2. 



240. The section of Fig. 28, if 6 = 12 inches, t \ inch, and each 

 channel is 12 inches deep and weighs 20.5 pounds per foot. Find also 

 the moment of inertia in respect to the axis 2-2. 



