New Mexico Administrative Code
Title 14 - HOUSING AND CONSTRUCTION
Chapter 7 - BUILDING CODES GENERAL
Part 4 - 2021 NEW MEXICO EARTHEN BUILDING MATERIALS CODE
Section 14.7.4.18 - LINTELS OVER OPENINGS

Universal Citation: 14 NM Admin Code 14.7.4.18

Current through Register Vol. 35, No. 18, September 24, 2024

A. General. All openings require a lintel or semi-circular arch over the opening. All lintels, whether of wood or concrete shall bear a minimum of two inches into the length of the wall. Exception: nichos and other shaped voids as defined in 14.7.4.15 NMAC.

B. Bearing limitations. Lintels shall bear a minimum of two inches beyond coved, splayed or rounded bearing portions of openings that are less than the full width of the wall. (Refer to Figure 15 of the earthen building figures supplement).

C. Lintels over openings in stabilized rammed earth walls. Openings less than 2four inches in width shall not require a lintel or semi-circular arched opening. Openings greater than 2four inches in width require lintels as defined in Table 4.

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.

Disclaimer: These regulations may not be the most recent version. New Mexico may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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