What is the minimum round footing size for a deck constructed on sandy gravel soil 40 psf ground snow load with a tributary area of 40 sf? (3.5 Points) 17" 10" 12" 14" 18.Unless specifically approved, clean sand or gravel intended as fill material supporting slab-on-ground concrete floors must be sufficiently compacted and cannot exceed __________. (3.5 Points) 24 inches 12 inches 8 inches 18 inches 19.Which of the following is NOT an approvable method of certifying sawn lumber for use in residential wood wall framing? (3.5 Points) Authorization by the AHJ of a written certification from the producing mill Grade mark by an accredited lumber grading agency Authorization by the AHJ that the material complies with ANSI/AWC WFCM Certification by an accredited inspection agency 20.Where the top plate of an unsheathed bearing wall is notched by more than 50% to accommodate a pipe or duct it must be: (3.5 Points) only allowed in walls with double top plates. limited to walls with stud spacing no more than 16 inches on center. reinforced with a galvanized metal tie strap. reinforced with additional blocking