Question

calculator ready before you begin the quiz If you get a score that you are unhappy with, you can submit corrections to your mistakes and earn back half of the points you missed. To do this, wait until the quiz is closed and the correct answers are viewable Print your quiz and correct your mistakes. Show a reason or recalculation for the correction. Turn in to you instructor within two weeks of the original due date. Question 1 2 pts Which of the following will have a size factor, CF, from table 5.2? O 5x5 stud grade O 6x24, No. 1 grade O 4x8, No.1 and better grade O 8x8, Dense No. 1 grade Question 2 2 pts 1242 psi Question 4 2 pts Which of the following is an incorrect definition for the type of Structural lumber listed? Hint: see section 5.1 O Post and Timbers: Rectangular sections 5in or more in thickness with width 2in or more greater than thickness. 0 Beams and Stringers: Rectangular sections 5in or more in thickness with width 2in or more greater than thickness O Dimension Lumber: Sections with thickness of 2in to 4in and width of 2in or more. O Decking: Lumber from 2in to 4in thick graded for flat application. Decking: Lumber from 2in to 4in thick graded for flat application Question5 2 pts What is the purpose of bridging or blocking in joist construction? Hint: see page 202 O To prevent excess deflection in joist O To prevent rotational or laterai buckling of the joist O To serve as a horizontal diaphragm O To provide a nailing edge for the ceiling panel s://ucdenver.instructure.com/courses/396632/quizzes/ 1 435 1 7/take?preview=1 uy buckling, regardless of the slenderness ratio ou have one attempt of 30 min to complete this quiz. Have your textbook, notes, graded homework Iculator ready before you begin the quiz. Question 3 2 pts Consider a W21x68, 50 ksi steel, select the correct Mn (you do NOT have to subtract the moment due to the weight of the beam) Use Table 9.1 O If fully laterally braced, Mn 487 kft O If laterally braced at 10ft, Mn 667 kft O if laterally braced at 11.9', Mn-567 kft O If laterally braced at 24ft, Mn 467 kft Question 4 2 pts Why is the depth indicated in the designation for a W shape referred to as a nominal dimension? O The actual depths within a depth group are identical, and the nearest whole number is used for the chart. O The actual depths within a depth group vary as a result of the rolling process. O The actual depths within a depth group exclude the various thicknesses of the flange. O The actual depths within a depth group vary with the different types of steel used, i.e. A36 vs A50. Question 5 2 pts

Answer 1

2l ts Sile an intoace definition fo the tup & e Rellasing ,ubi than thickney) ing in joist Cons uuction? e-5. whath puupobridging o blocki = 5600-464 r-ft 2 e-4 cohy is 4ha depth eicatedn th dignation sot o ) shope Pins- d. The actval dephs uithin a dept goup uaty with thi different tpe stal wd Cie A s6 vs A50)