24 21-3 16-11 18-3 16-6 13-1 14-2 12 33-5 29-1 31-4 26-6 22-6 24-4 2 x 16 30-0 25-2 27-2 24-4 19-6 21-1 12 24 25-10 20-6 22-2 20-0 15-11 17-2 MAXIMUM RAFTER SPANS Selected Species Southern Yellow Fir White Fir Pine Yellow Yellow Pine Pine Pine Grades NO. 1 NO. 2 NO. 2 NO. 1 NO. 2 NO. 2 HIGH SLOPE (Over 3:12) Spacing 20# Live 40# Live Load-Heavy Size O.C. Roofing Roofing 12 11-6 10-3 11-0 8-5 7-4 7-8 2 x 4 16 10-5 9-1 9-6 7-3 6-4 6-8 24 8-6 7-4 7-9 5-11 5-2 5-5 12 18-1 15-0 16-2 13-2 10-6 11-4 2 x 8 16 16-4 13-0 14-0 11-5 9-1 9-10 24 13-4 10-7 11-5 9-4 7-5 8-0 12 23-8 19-9 21-4 17-5 13-10 14-11 2 x 10 16 21-6 17-1 18-5 15-1 12-0 12-11 24 17-7 13-11 15-1 12-4 9-9 10-7 12 30-3 25-2 27-2 22-2 17-8 19-1 2 x 12 16 27-5 21-10 23-7 19-3 15-3 16-6 24 22-5 17-10 19-3 15-8 12-6 13-6 INTERIM TRANSITION: Any questions on what we just covered before the demonstration. INSTRUCTORS NOTE: Use dry erase board to illustrate cut. “birds-mouth” (On SLIDE #116) DEMONSTRATION. (5 min) Gather the students attention to the dry erase board and chosen table/desk for a brief demonstration of the cut technique. STUDENT ROLE: Observe the cut technique. INSTRUCTOR(s) ROLE: Visually demonstrate, by illustration and/or actual samples, to the students’, the cut fastening “birds-mouth” technique.
24 21-3 16-11 18-3 16-6 13-1 14-2 2 x 12 12 16 24 33-5 30-0 25-10 29-1 25-2 20-6 31-4 27-2 22-2 26-6 24-4 20-0 22-6 19-6 15-11 24-4 21-1 17-2 MAXIMUM RAFTER SPANS Selected Species Southern Yellow Pine Yellow Pine Fir Yellow Pine White Pine Fir Grades NO. 1 NO. 2 NO. 2 NO. 1 NO. 2 NO. 2 HIGH SLOPE (Over 3:12) Size Spacing O.C. 20# Live Roofing 40# Live Load-Heavy Roofing 2 x 4 12 16 24 11-6 10-5 8-6 10-3 9-1 7-4 11-0 9-6 7-9 8-5 7-3 5-11 7-4 6-4 5-2 7-8 6-8 5-5 2 x 8 12 16 24 18-1 16-4 13-4 15-0 13-0 10-7 16-2 14-0 11-5 13-2 11-5 9-4 10-6 9-1 7-5 11-4 9-10 8-0 2 x 10 12 16 24 23-8 21-6 17-7 19-9 17-1 13-11 21-4 18-5 15-1 17-5 15-1 12-4 13-10 12-0 9-9 14-11 12-11 10-7 2 x 12 12 16 24 30-3 27-5 22-5 25-2 21-10 17-10 27-2 23-7 19-3 22-2 19-3 15-8 17-8 15-3 12-6 19-1 16-6 13-6 INTERIM TRANSITION: Any questions on what we just covered before the demonstration. INSTRUCTORS NOTE: Use dry erase board to illustrate “birds-mouth” cut. (On SLIDE #116) DEMONSTRATION. (5 min) Gather the students attention to the dry erase board and chosen table/desk for a brief demonstration of the cut technique. STUDENT ROLE: Observe the cut technique. INSTRUCTOR(s) ROLE: Visually demonstrate, by illustration and/or actual samples, to the students’, the “birds-mouth” cut fastening technique.
COMPLETED%20DESIGN%20VERTICAL%20CONSTRUCTION%20INSTR%20LP.docx