4-12 A  horizontal  load-bearing  structure that spans a space and is supported at both ends. 1. A 2. B 3. D 4. M 4-13. Usually  rests  directly  on  footings. 4-14. 1. C and H 2. E and F 3. H and K 4. J and L The  chief  vertical  structural member  used  in  the  construction  of lightweight  buildings. 1. C 2. E 3. G 4. L 4-15. Supports the ends of floor beams or joists  in  wood-frame  construction. 4-16. 1. D, E, and J 2. E, H, and L 3. F and G 4. H and J A member that is fixed at one end. 1. A 2. B 3. D 4. I 4-17. 4-18. 4-19. Support the wall ends of rafters. 1. A and D 2. G and H 3. I and M 4. K and L May rest directly on a footing, or may be set or driven into the ground. 1. C 2. G 3. H 4. L Two horizontal members joined together by a number of vertical and/or  inclined  members. 1. B 2. D 3. L 4. N 4-20. The  process  of  riveting  steel structures  has  been  replaced  by welding  because  of  its  greater strength  and  reduction  of  stress applied  to  the  connection. 1. True 2. False IN  ANSWERING  QUESTIONS  4-21  THROUGH 4-24,  REFER  TO  THE  WELD  SYMBOL  ELEMENTS IN FIGURE 7-4 IN THE TEXTBOOK. 4-21. 4-22. 4-23. 4-24. 4-25. What  element  shows  the specification,  process,  or  other reference as to the type of fabrication? 1. 5 2. 6 3. 7 4. 8 In part 6,    the letter G provides what  information  about  the  weld? 1. It will be finished by filing 2. It will be finished by grinding 3. It is double welded and ground 4. It requires a 2-4 finish In part 4,    the  symbols  "1/2"  and "2-4" show that the weld should be (a) how thick, (b) how long, and (c) have how much pitch? 1. (a) 2 inches, (b) 1/2 inch, (c) 4 inches 2. (a) 1/2 inch, (b) 4 inches, (c) 2 inches 3. (a) 4 inches, (b) 1/2 inch, (c) 2 inches 4. (a) 1/2 inch, (b) 2 inches, (c) 4 inches In part 2,   the  arrow  provides  what information  about  the  weld? 1. Location 2. Direction 3. Type 4. Degree of finish When  steel  structures  will  be riveted,    the rivet holes are always drilled  during  which  of  the following  steps? 1. Fabrication 2. Assembly  on  site 3. Both 1 and 2 above 4. Erection 23