H.W #4: The lap joint shown in figure is fastened by five 25 mm diameter rivets. Determine the maximum safe load P that can be applied if the shearing stress in the rivet is limited to 175 MPa, the bearing stress in the plate to 140 MPa, and the tensile stress in the plate to 132 MPa. P 120 mm 30 mm 180 mm 30 mm P

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Q: A steel bracket of solid circular crosssection is subjected to two loads, each of which isP = 4.5 kN…

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Q: The bolt in the figure below is 1 in. in diameter. If the load P is 10 kips, determine the average…

A: Given-Bolt diameter= 1 inchLoad, P=10kips

Q: The beam shown below has a cross section of channel shape with width b=200 mm and height h=80 mm,…

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Q: 06. The lap joint is connected by three 20-mm diameter rivets. Assuming that the axial load P = 50…

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Q: Assume that the clamp shown has been tightened on wooden planks being glued together until P = 420…

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Sizing Joists and Rafters

In civil engineering and building construction, joists and rafters are the major components including beams and columns. Almost every structural construction including buildings, skyscrapers, bridges, commercial complexes, and so on makes use of joists and rafters to provide structural integrity to the building. Joists are primarily thick long pieces of metals, concrete, or wood that are used to support the floor and ceiling. On the other hand, rafters form the major component of pitched roofs, which are a series of sloped long pieces extending from a ridged area that makes contact with the plane area of the wall. They account for the load-bearing of the building along with the beams.