TABLE 82 Allowable Spans in Feet and Inches for Ceiling Joists (Drywall Cellingr Modulus of Elasticity, E, in 1,000,000 psi S feng 0.8 09 1.0 1.2 13 LA 15 1.6 1.7 1.8 19 20 22 13-2 ररा 1270 13-9 नारा 1400 12-8 12-11 134 103 770 10-11 880 911 970 8-8 I110 17-2 11-7 980 10-6 1-10 12-2 1080 10-7 12-5 9-10 710 -11 780 7-10 900 15-6 ०रा 710 11-3 930 10-3 1030 -11 1170 17-8 930 1030 10-9 1180 11-6 1290 100 1480 19-11 180 18-1 1290 830 9-8 120 1130 12-2 12-6 1540 11-9 140 10-3 1540 20-3 11-11 1390 105 1600 20-8 94 11-0 11-3 JORO 92 1240 18-2 980 1140 9-5 1300 18-8 I00 16-11 1140 1440 10-7 1650 21-0 1190 1240 850 8-1 970 16-1 910 8-5 1040 16-8 830 15-2 910 13-3 1040 21-11 830 19-11 910 17-5 1040 28-0 830 25-5 910 24 16.0 9-8 1360 10-11 1760 21-8 1400 198 1540 17-2 1760 28-7 9-10 1420 19-6 24.0 19-1 OC21 18-5 18-9 OLE 1310 19-1 880 15-7 970 13-8 1130 17-8 770 147 850 12-9 970 21-2 770 16-1 16-6 174 14-1 780 12-3 900 20-5 710 18-6 780 16-2 900 26-0 I080 14-5 1240 24-0 980 21-9 1080 1190 1240 15-6 1420 25-8 130 234 1240 20-5 1420 32-9 130 29-9 1240 26-0 1420 1340 16-1 1540 26-9 1220 24-3 1340 21-2 1540 34-1 1220 31-0 1340 27-1 1440 16-8 1650 27-8 1310 25-2 1440 21-11 1650 35-4 1390 164 1600 27-2 1270 24-8 160 I00 15-2 1360 25-2 IO80 15-9 14R0 14-1 14-9 1300 24-7 100 22-4 1140 1170 23-4 24.0 22-8 26-2 1400 25-11 1540 22-8 1760 36-5 930 21-2 120 880 22-10 193 850 16-10 970 20-7 970 18-0 23-10 1290 20-10 1480 33-5 1390 21-7 1600 34-8 1190 19.11 150 32-1 1080 29-2 1190 25-5 2x8 160 18-6 1170 29.9 930 27-1 100 23-8 190 1240 30-7 980 27-9 1080 24-3 19-6 100 314 100 24.0 28-11 880 26-3 970 22-11 27-1 जरर 32-1 1310 1400 33-1 1540 28-11 120 710 23-8 770 24-7 850 21-6 970 30-5 1290 26-6 31-6 1390 27-6 28-6 1140 24-10 1300 1440 28-0 1650 2x10 16.0 780 20-8 22-3 24.0 900 1040 1170 1240 1480 1540 1600 1760 *Crierie 10 pef ive lead. 5 paf dead load, live lead deflection limited to Ne of the spun Number shown in each bes belw te span is the minimum muind allowsle beading ses in psi. Soure: Rependuced from the Uniform lng Code, 1991 ed Ref. 3 with permisains ef de puhtitern, termational Conference of Building Offciala Problem 8.7.A, B, C. Using the following data, select Douglas fir-larch No. 2 grade ceiling joists from Table 8.2: Joist Spacing Wood Grade Span A 16 in. No. 2 12 ft 16 in. No. 3 14 ft B 24 in. No. 2 18 ft 司到 126
TABLE 82 Allowable Spans in Feet and Inches for Ceiling Joists (Drywall Cellingr Modulus of Elasticity, E, in 1,000,000 psi S feng 0.8 09 1.0 1.2 13 LA 15 1.6 1.7 1.8 19 20 22 13-2 ररा 1270 13-9 नारा 1400 12-8 12-11 134 103 770 10-11 880 911 970 8-8 I110 17-2 11-7 980 10-6 1-10 12-2 1080 10-7 12-5 9-10 710 -11 780 7-10 900 15-6 ०रा 710 11-3 930 10-3 1030 -11 1170 17-8 930 1030 10-9 1180 11-6 1290 100 1480 19-11 180 18-1 1290 830 9-8 120 1130 12-2 12-6 1540 11-9 140 10-3 1540 20-3 11-11 1390 105 1600 20-8 94 11-0 11-3 JORO 92 1240 18-2 980 1140 9-5 1300 18-8 I00 16-11 1140 1440 10-7 1650 21-0 1190 1240 850 8-1 970 16-1 910 8-5 1040 16-8 830 15-2 910 13-3 1040 21-11 830 19-11 910 17-5 1040 28-0 830 25-5 910 24 16.0 9-8 1360 10-11 1760 21-8 1400 198 1540 17-2 1760 28-7 9-10 1420 19-6 24.0 19-1 OC21 18-5 18-9 OLE 1310 19-1 880 15-7 970 13-8 1130 17-8 770 147 850 12-9 970 21-2 770 16-1 16-6 174 14-1 780 12-3 900 20-5 710 18-6 780 16-2 900 26-0 I080 14-5 1240 24-0 980 21-9 1080 1190 1240 15-6 1420 25-8 130 234 1240 20-5 1420 32-9 130 29-9 1240 26-0 1420 1340 16-1 1540 26-9 1220 24-3 1340 21-2 1540 34-1 1220 31-0 1340 27-1 1440 16-8 1650 27-8 1310 25-2 1440 21-11 1650 35-4 1390 164 1600 27-2 1270 24-8 160 I00 15-2 1360 25-2 IO80 15-9 14R0 14-1 14-9 1300 24-7 100 22-4 1140 1170 23-4 24.0 22-8 26-2 1400 25-11 1540 22-8 1760 36-5 930 21-2 120 880 22-10 193 850 16-10 970 20-7 970 18-0 23-10 1290 20-10 1480 33-5 1390 21-7 1600 34-8 1190 19.11 150 32-1 1080 29-2 1190 25-5 2x8 160 18-6 1170 29.9 930 27-1 100 23-8 190 1240 30-7 980 27-9 1080 24-3 19-6 100 314 100 24.0 28-11 880 26-3 970 22-11 27-1 जरर 32-1 1310 1400 33-1 1540 28-11 120 710 23-8 770 24-7 850 21-6 970 30-5 1290 26-6 31-6 1390 27-6 28-6 1140 24-10 1300 1440 28-0 1650 2x10 16.0 780 20-8 22-3 24.0 900 1040 1170 1240 1480 1540 1600 1760 *Crierie 10 pef ive lead. 5 paf dead load, live lead deflection limited to Ne of the spun Number shown in each bes belw te span is the minimum muind allowsle beading ses in psi. Soure: Rependuced from the Uniform lng Code, 1991 ed Ref. 3 with permisains ef de puhtitern, termational Conference of Building Offciala Problem 8.7.A, B, C. Using the following data, select Douglas fir-larch No. 2 grade ceiling joists from Table 8.2: Joist Spacing Wood Grade Span A 16 in. No. 2 12 ft 16 in. No. 3 14 ft B 24 in. No. 2 18 ft 司到 126
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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