Table 4 Concrete Lintels Over Openings in Rammed Earth Walls (1) | |||||
Wall width | Lintel span | Lintel depth | Reinforcement (2) | Reinforcement Concrete Cover (3) | Uniform Load |
18" | 24" | 6" | 3- #4 @ 4"o.c. | 3" minimum concrete cover on all sides | 1000 PLF |
36" | 6" | 3- #4 @ 4"o.c. | |||
48" | 6" | 3- #4 @ 4"o.c. | |||
60" | 6" | 3- #4 @ 4"o.c. | |||
72" | 8" | 3- #5 @ 4"o.c. | |||
84" | 8" | 3- #5 @ 4"o.c. | |||
96" | 8" | 3- #5 @ 4"o.c. | |||
20" | 24" | 6" | 3- #4 @ 4"o.c. | 4" minimum concrete cover on all sides | 1350 PLF |
36" | 6" | 3- #4 @ 4"o.c. | |||
48" | 6" | 3- #4 @ 4"o.c. | |||
60" | 6" | 3- #4 @ 4"o.c. | |||
72" | 8" | 3- #5 @ 4"o.c. | |||
84" | 8" | 3- #5 @ 4"o.c. | |||
96" | 10" | 3- #5 @ 4"o.c. | |||
22" | 24" | 6" | 3- #4 @ 5"o.c. | 3 1/2" minimum concrete cover on all sides | 1700 PLF |
36" | 6" | 3- #4 @ 5"o.c. | |||
48" | 6" | 3- #4 @ 5"o.c. | |||
60" | 6" | 3- #4 @ 5"o.c. | |||
72" | 8" | 3- #5 @ 5"o.c. | |||
84" | 10" | 3- #5 @ 5"o.c. | |||
96" | 10" | 3- #5 @ 5"o.c. | |||
24" | 24" | 6" | 3- #4 @ 6"o.c. | 3" minimum concrete cover on all sides | 2000 PLF |
36" | 6" | 3- #4 @ 6"o.c. | |||
48" | 6" | 3- #4 @ 6"o.c. | |||
60" | 6" | 3- #4 @ 6"o.c. | |||
72" | 8" | 3- #5 @ 6"o.c. | |||
84" | 10" | 3- #5 @ 6"o.c. | |||
96" | 12" | 3- #5 @ 6"o.c. | |||
1. 3000 psi minimum concrete at approximately 28 days. 2. Grade 40 steel reinforcement minimum. 3. Steel reinforcement at mid-depth of lintel. |
N.M. Code R. § 14.7.4.18