Page 342 - 2018_IRC

WALL CONSTRUCTION

TABLE R608.8(7)
MAXIMUM ALLOWABLE CLEAR SPANS FOR 8-INCH-THICK WAFFLE-GRID LINTELS IN LOAD-BEARING WALLS a, b, c, d, e, f, o
MAXIMUM ROOF CLEAR SPAN 40 FEET AND MAXIMUM FLOOR CLEAR SPAN 32 FEET
DESIGN LOADING CONDITION DETERMINED FROM TABLE R608.8(1)
NUMBER OF
LINTEL DEPTH, BARS AND BAR STEEL YIELD 1 2 3 4 5
h
D g SIZE IN TOP AND STRENGTH , f y Maximum ground snow load (psf)
(inches) BOTTOM OF (psi) — 30 70 30 70 30 70 30 70
LINTEL
Maximum clear span of lintel (feet - inches)
Span without stirrups k, l 2-6 2-9 2-0 2-1 2-0 2-0 2-0 2-0 2-0
40,000 4-5 4-9 3-7 3-9 3-4 3-0 2-10 2-3 2-2
1-#4
8 i 60,000 5-6 6-2 4-0 4-3 3-7 3-1 2-10 2-3 2-2
1-#5 40,000 5-6 6-2 4-0 4-3 3-7 3-1 2-10 2-3 2-2
Center distance A m, n 0-9 0-10 0-6 0-6 0-5 0-4 0-4 STL STL
Span without stirrups k, l 2-10 3-1 2-6 2-7 2-5 2-3 2-2 2-0 2-0
40,000 5-7 6-1 4-8 4-10 4-4 3-11 3-8 3-0 2-11
1-#4
60,000 6-9 7-5 5-8 5-11 5-4 4-9 4-5 3-8 3-7
40,000 6-11 7-7 5-10 6-0 5-5 4-10 4-6 3-9 3-7
12 i 1-#5
60,000 8-8 10-1 6-7 7-0 5-11 5-2 4-8 3-9 3-7
2-#4 40,000 8-8 9-10 6-7 7-0 5-11 5-2 4-8 3-9 3-7
1-#6 60,000 8-8 10-1 6-7 7-0 5-11 5-2 4-8 3-9 3-7
Center distance A m, n 1-2 1-5 0-10 0-11 0-9 0-7 0-6 STL STL
Span without stirrups k, l 3-10 4-3 3-6 3-7 3-4 3-2 3-0 2-10 2-9
40,000 6-5 7-2 5-6 5-9 5-2 4-8 4-4 3-7 3-6
1-#4
60,000 7-9 8-9 6-9 7-0 6-3 5-8 5-3 4-4 4-3
40,000 7-11 8-11 6-10 7-1 6-5 5-9 5-4 4-5 4-4
16 i 1-#5
60,000 9-8 10-11 8-4 8-8 7-10 7-0 6-6 5-2 5-1
2-#4 40,000 9-0 10-1 7-9 8-0 7-3 6-6 6-1 5-0 4-11
1-#6 60,000 11-5 13-10 9-2 9-8 8-3 7-2 6-6 5-2 5-1
Center distance A m, n 1-6 1-11 1-2 1-3 1-0 0-10 0-8 STL STL
Span without stirrups k, l 4-10 5-5 4-5 4-7 4-3 4-0 3-11 3-7 3-7
40,000 7-0 8-1 6-3 6-5 5-10 5-3 4-11 4-1 3-11
1-#4
60,000 8-7 9-10 7-7 7-10 7-1 6-5 6-0 4-11 4-10
40,000 8-9 10-1 7-9 8-0 7-3 6-6 6-1 5-1 4-11
1-#5
20 i 60,000 10-8 12-3 9-6 9-10 8-10 8-0 7-5 6-2 6-0
2-#4 40,000 9-10 11-4 8-9 9-1 8-2 7-4 6-10 5-8 5-7
1-#6 60,000 12-0 13-10 10-8 11-0 9-11 9-0 8-4 6-8 6-6

40,000 12-3 14-1 10-10 11-3 10-2 8-11 8-1 6-6 6-4
2-#5
60,000 14-0 17-6 11-8 12-3 10-6 9-1 8-4 6-8 6-6
Center distance A m, n 1-10 2-5 1-5 1-7 1-3 1-0 0-11 STL STL
(continued)

2018 INTERNATIONAL RESIDENTIAL CODE ® 317
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