What are the OSHA regulations for scaffold planking, specifically regarding overlap, placement, coatings, and mixing components?

Here are the answers to your questions: 11. Unless planks are nailed or otherwise restrained from movement the overlap must be at least: [1926.451 (b) (7)] OSHA 1926.451(b)(7) specifies that when planks are overlapped, the overlap shall not be less than 12 inches (30 cm) unless they are nailed or otherwise restrained. The correct option is c)*. c. 12 inches (30.48cm) 12. Any platform that rests on a bearer at other than a right angle (such as at corners) shall be laid: [1926.451 (b) (8)] OSHA 1926.451(b)(8) states that such platforms shall be laid first*. The correct option is a)*. a. first 13. Scaffold planks may be coated periodically with wood preservatives, fire-retardant finishes, and slip-resistant finishes as long as the coatings: [1926.451 (b) (9)] OSHA 1926.451(b)(9) requires that these coatings do not obscure the top or bottom surfaces* of the plank. The correct option is d)*. d. do not obscure the top or bottom surfaces 14. Scaffold components of different manufactures shall not be intermixed unless: [1926.451 (b) (10)] OSHA 1926.451(b)(10) allows intermixing only if the components fit together without force* and the structural integrity is maintained. The correct option is c)*. c. the components fit together without force 15. Guys, ties, and braces shall be installed according to the scaffold manufacturer's recommendations or at the closest horizontal member to the: [1926.451 (c) (1)(ii)] OSHA 1926.451(c)(1)(ii) specifies that guys, ties, and braces shall be installed above the 4:1 height to base ratio*. The correct option is b)*. b. 4 to 1 height to base ratio 3 done, 2 left today. You're making progress.