Masonry Magazine March 1971 Page. 36
Type of Loading
TABLE 1. Steel Reinforcement
TABLE 2-force-ment
Total Shear and Moment Resistance of Reinforced Concrete Masonry Lintels Containing No Shear Reinforcement (Stirrups)
Required Reinforcing for Simply Supported Reinforced Concrete Masonry Lintels
Lintel Section Nominal Size In. Required Reinforcing Clear Span 3'4 4'0 4'8 5'4 6'0 6'8 7'4 8'0 1-#3 1-#4 1-4 2-4 2-#5
1500 PRISM STRENGTH (f/) psi 2000 2500 3000 VR MR VE MR VRM VR M
6-inch Wide By 8-inch High Lintels. b=5.625" d=4.625" 1-#3 778 8536 787 9140 796 9240 802 9340 1-#4 1007 10341 1023 12544 1034 14488 1044 14781 1-#5 1108 11835 1246 14512 1262 16907 1275 17399 2-#3 1108 10770 1279 13118 1300 15180 1300 15520
6-inch Wide By 16-inch High Lintels b = 5.625" d=12.625" 1-#3 2239 26000 2258 26260 2269 26260 2279 26500 1-#4 2919 46460 2948 46700 2970 47200 2985 47460 1-#5 3025 63609 3493 70700 3550 71440 3550 71960 2-#3 3025 50240 3493 50740 3550 51240 3550 51500
8-inch Wide By 8-inch High Lintels b=7.625" d=4.625" 2-#3 1502 13301 1546 16136 1564 18220 1578 18400 2-#4 1502 16043 1734 19673 1763 22918 1763 23585 2-#5 1502 17996 1734 22265 1763 26182 1763 27015 2-#6 1502 19457 1734 24346 1763 28766 1763 29892
8-inch Wide By 16-inch High Lintels b = 7.625" d=12.625" 2-#3 4101 51000 4421 51500 4454 51760 4478 52260 2-#4 4101 86225 4735 91140 4813 92160 4813 92920 2-#5 4101 99112 4735 120242 4813 138056 4813 141061 2-#6 4101 112640 4736 137510 4813 159523 4813 163481
Notes:
V Shear Governed by Diagonal Tension; V₁= vbd
V Shear Governed by Bond; V = Zo ujd
M Moment Governed by Prism Strength (f); M = fmjkbd
M Moment Governed By Steel; M = Asfsjd
NOTE: Wall loads assumed 300 lbs per lineal foot
1-#4 1-#41-#4 1-#4 Floor and Roof loads including wall loads assumed 1000 lb. per lineal foot
8" lintels assumed to weigh 50 lbs/ft
1-#4 1-#4 2-#3 1-#5 2-#4 2-#4 2-5 2-#5 1-#3 2-3 2-3 2-4 2-#4 2-5 2-#6 Wall Loads 6x8 6x16
loor & Roof Loads 6x16 8x8 Wall Loads 8x16
"loor & Roof Loads 8x8 2-#4 8x16 2-#52-#5 2-#3 2-3 2-3 2-4 2-#4 2-#4 2-5 2-#5 Includes weight of lintel
16" lintels assumed to weigh 100 lbs/ft
NATIONAL CONCRETE MASONRY ASSOCIATION P.O. Box 9185, Rosslyn Station, Arlington, Virginia 22209