A 75x300mm wooden beam is not sufficient to carry the loads imposed upon it. It has a simple span of 7.2m. It is to be used by two men in removing concrete forms on the side of a reinforced concrete structure. Each man has a weight of 55 kg but one of them can carry 80 kg while the other can carry only 35 kg. The two men will at no time be closer than 1.2m while moving along the plank. Neglect the weight of the planks, it is desired to place another plank of equal length and width of the gangplank to be placed on top of the 75x300mm gang plank. Allowable bending stress = 9.68 MPa. Start the dimension of your material at 50 mm. Compute the following: a.) The size of the gangplank to be placed on top of the 75x300mm gangplank. b.) The flexural stress of the old gangplank after the placement of the new gangplank on top of it. c.) The flexural stress of the new gangplank placed on top of the 75x300mm gangplank.
A 75x300mm wooden beam is not sufficient to carry the loads imposed upon it. It has a simple
span of 7.2m. It is to be used by two men in removing concrete forms on the side of a
reinforced concrete structure. Each man has a weight of 55 kg but one of them can carry 80 kg
while the other can carry only 35 kg. The two men will at no time be closer than 1.2m while
moving along the plank. Neglect the weight of the planks, it is desired to place another plank
of equal length and width of the gangplank to be placed on top of the 75x300mm gang plank.
Allowable bending stress = 9.68 MPa. Start the dimension of your material at 50 mm.
Compute the following:
a.) The size of the gangplank to be placed on top of the 75x300mm gangplank.
b.) The flexural stress of the old gangplank after the placement of the new gangplank on top of
it.
c.) The flexural stress of the new gangplank placed on top of the 75x300mm gangplank.
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