18-09
A- CHECK A (W6x9) STEEL SECTION FOR
COLUMNS OF THE STRUCTURE SHOWN.
K=1.0
Worc =1.5K/F
d=5 7/8"
(W12x26) BEAM
(W6x9) COL. (W6x9) COL
-FINISH FLOOR
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W6x9
A = 2.68 in2
rx= 2.41 in
ry= 0.905 in
B-CAN COLUMNS BE REPLACED WITH A (6x6 D. F. #1)
WOOD SECTION?

The characteristic roots of a dynamic system are: 1.7920 1.8160 i, -1.7920 1.8160 i, -0.4160 what is the order of this system? what are the settling time and damping ratio of the system?

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.