R502.3.2 Other Floor Joists

Table R502.3.1(2) shall be used to determine the maximum allowable span of floor joists that support other areas of the building, other than sleeping ...

(continued) TABLE 2308.4.2.1(2)‒continued FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES (Residential living areas, live load = 40 psf, L/Δ = 360) JOIST SPACING (inches) SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf 2 × 6 2 × 8 2 × 10 2 × 12 2 × 6 2 × 8 2 × 10 2 × 12 Maximum floor joist spans (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) 19.2 Douglas Fir-Larch SS 9-8 12-10 16-4 19-10 9-8 12-10 16-4 19-2 Douglas Fir-Larch #1 9-4 12-4 15-0 17-5 8-10 11-3 13-8 15-11 Douglas Fir-Larch #2 9-1 11-6 14-1 16-3 8-3 10-6 12-10 14-10 Douglas Fir-Larch #3 6-10 8-8 10-7 12-4 6-3 7-11 9-8 11-3 Hem-Fir SS 9-2 12-1 15-5 18-9 9-2 12-1 15-5 18-9 Hem-Fir #1 9-0 11-10 14-8 17-0 8-8 10-11 13-4 15-6 Hem-Fir #2 8-7 11-3 13-10 16-1 8-2 10-4 12-8 14-8 Hem-Fir #3 6-10 8-8 10-7 12-4 6-3 7-11 9-8 11-3 Southern Pine SS 9-6 12-7 16-0 19-6 9-6 12-7 16-0 19-6 Southern Pine #1 9-2 12-1 14-8 17-5 9-0 11-5 13-5 15-11 Southern Pine #2 8-6 10-10 12-10 15-1 7-9 9-10 11-8 13-9 Southern Pine #3 6-5 8-2 9-10 11-8 5-11 7-5 9-0 10-8 Spruce-Pine-Fir SS 9-0 11-10 15-1 18-4 9-0 11-10 15-1 17-9 Spruce-Pine-Fir # 8-9 11-6 14-1 16-3 8-3 10-6 12-10 14-10 Spruce-Pine-Fir #2 8-9 11-6 14-1 16-3 8-3 10-6 12-10 14-10 Spruce-Pine-Fir #3 6-10 8-8 10-7 12-4 6-3 7-11 9-8 11-3 24 Douglas Fir-Larch SS 9-0 11-11 15-2 18-5 9-0 11-11 14-9 17-1 Douglas Fir-Larch #1 8-8 11-0 13-5 15-7 7-11 10-0 12-3 14-3 Douglas Fir-Larch #2 8-1 10-3 12-7 14-7 7-5 9-5 11-6 13-4 Douglas Fir-Larch #3 6-2 7-9 9-6 11-0 5-7 7-1 8-8 10-1 Hem-Fir SS 8-6 11-3 14-4 17-5 8-6 11-3 14-4 16-10 a Hem-Fir #1 8-4 10-9 13-1 15-2 7-9 9-9 11-11 13-10 Hem-Fir #2 7-11 10-2 12-5 14-4 7-4 9-3 11-4 13-1 Hem-Fir #3 6-2 7-9 9-6 11-0 5-7 7-1 8-8 10-1 Southern Pine SS 8-10 11-8 14-11 18-1 8-10 11-8 14-11 18-0 Southern Pine #1 8-6 11-3 13-1 15-7 8-1 10-3 12-0 14-3 Southern Pine #2 7-7 9-8 11-5 13-6 7-0 8-10 10-5 12-4 Southern Pine #3 5-9 7-3 8-10 10-5 5-3 6-8 8-1 9-6 Spruce-Pine-Fir SS 8-4 11-0 14-0 17-0 8-4 11-0 13-8 15-11 Spruce-Pine-Fir #1 8-1 10-3 12-7 14-7 7-5 9-5 11-6 13-4 Spruce-Pine-Fir #2 8-1 10-3 12-7 14-7 7-5 9-5 11-6 13-4 Spruce-Pine-Fir #3 6-2 7-9 9-6 11-0 5-7 7-1 8-8 10-1 For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. Note: Check sources for availability of lumber in lengths greater than 20 feet. a. End bearing length shall be increased to 2 inches. Joists shall be supported laterally at the ends and at each support by solid blocking except where the ends of the joists are nailed to a header, band or rim joist or to an adjoining stud or by other means ...

Blocking shall be installed between every other joist over cantilever bearing supports in accordance with Figure R505.3.1(4), R505.3.1(5) or R505.3.1(6). Blocking shall consist of C-shape or track section with minimum thickness of 33 mils (0.84 mm). Blocking shall be fastened to each adjacent joist through bent web of blocking, 33 mil clip angle or flange of web stiffener with two No. 8 screws at each end. The depth of the blocking shall be equal to the depth of the joist. The minimum length of the angle shall be equal to the depth of the joist minus 2 inches (51 mm). Blocking shall be fastened through the floor sheathing ...

Blocking shall be installed between every other joist over cantilever bearing supports in accordance with Figure R505.3.1(4), R505.3.1(5) or R505.3.1(6). Blocking shall consist of C-shape or track section with minimum thickness of 33 mils (0.84 mm). Blocking shall be fastened to each adjacent joist through bent web of blocking, 33 mil clip angle or flange of web stiffener with two No. 8 screws at each end. The depth of the blocking shall be equal to the depth of the joist. The minimum length of the angle shall be equal to the depth of the joist minus 2 inches (51 mm). Blocking shall be fastened through the floor sheathing and to the support with three No. 8 screws (top and bottom) ...

MINIMUM THICKNESS OF LUMBER FLOOR SHEATHING JOIST OR BEAM SPACING (inches) MINIMUM NET THICKNESS Perpendicular to joist ...