A snow load on a 8m-long Pratt roof truss can be modeled by five 1kN forces...

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A snow load on a 8m-long Pratt roof truss can be modeled by five "1kN" forces acting vertically on joints A, B, C, D and E, as shown below. 1 kN 2 m 1 kN 1 kN A B H 2 m 1 kN 1 kN B 2 m 2 m H 2 m G 2 m Find the vertical reactions at support A and E, then find the force in each member of the truss, determine whether each member is in tension or compression, and enter your results in the corresponding part of the table in the next page. You can use the "method of joints", and rely on symmetry considerations to simplify your calculations (forces in symmetrical members will be identical). In order to compare types of trusses, the same load is now applied on a Howe roof truss of the same length (see below). Find the reactions at the two supports, and then fill in the other part of the table with the calculated values. 1 kN 2 m 1 kN G D 2 m F 2 m 1 kN D 1 kN E F 2m 1 kN E A snow load on a 8m-long Pratt roof truss can be modeled by five "1kN" forces acting vertically on joints A, B, C, D and E, as shown below. 1 kN 2 m 1 kN 1 kN A B H 2 m 1 kN 1 kN B 2 m 2 m H 2 m G 2 m Find the vertical reactions at support A and E, then find the force in each member of the truss, determine whether each member is in tension or compression, and enter your results in the corresponding part of the table in the next page. You can use the "method of joints", and rely on symmetry considerations to simplify your calculations (forces in symmetrical members will be identical). In order to compare types of trusses, the same load is now applied on a Howe roof truss of the same length (see below). Find the reactions at the two supports, and then fill in the other part of the table with the calculated values. 1 kN 2 m 1 kN G D 2 m F 2 m 1 kN D 1 kN E F 2m 1 kN E

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Solution to the Pratt roof truss Vertical reactions at A and E Due to symmetrythe vertical reactions at A and E are equalTo find the vertical reaction at Awe can take a moment sum about E ME 0 2RA 21 ... View the full answer