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R404.1.1 Design Required

Residential Code 2015 of Utah > 4 Foundations > R404 Foundation and Retaining Walls > R404.1 Concrete and Masonry Foundation Walls > R404.1.1 Design Required

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Concrete or masonry foundation walls shall be designed in accordance with accepted engineering practice where either of the following conditions exists: 

 Walls are subject to hydrostatic pressure from ground water. 
 Walls supporting more than 48 inches (1219 mm) of unbalanced backfill that do not have permanent lateral support at the top or bottom. 


 


TABLE R404.1.1(1)
  PLAIN MASONRY FOUNDATION WALLSf

  MAXIMUM WALL HEIGHT 
 (feet)
  MAXIMUM 
 UNBALANCED 
 BACKFILL HEIGHTc 
 (feet)
  PLAIN MASONRYa MINIMUM NOMINAL WALL THICKNESS (inches)
 

  Soil classesb
 

  GW, GP, SW 
 and SP
  GM, GC, SM, 
 SM-SC and ML
  SC, MH, ML-CL 
 and inorganic CL
 

  5
  4
  6 solidd or 8
  6 solidd or 8
  6 solidd or 8
 

  5
  6 solidd or 8
  8
  10
 

  6
  4
  6 solidd or 8
  6 solidd or 8
  6 solidd or 8
 

  5
  6 solidd or 8
  8
  10
 

  6
  8
  10
  12
 

  7
  4
  6 solidd or 8
  8
  8
 

  5
  6 solidd or 8
  10
  10
 

  6
  10
  12
  10 solidd
 

  7
  12
  10 solidd
  12 solidd
 

  8
  4
  6 solidd or 8
  6 solidd or 8
  8
 

  5
  6 solidd or 8
  10
  12
 

  6
  10
  12
  12 solidd
 

  7
  12
  12 solidd
  Footnote e
 

  8
  10 groutd
  12 groutd
  Footnote e
 

  9
  4
  6 groutd or 8 solidd or 12
  6 groutd or 8 solidd
  8 groutd or 10 solidd
 

  5
  6 groutd or 10 solidd
  8 groutd or 12 solidd
  8 groutd
 

  6
  8 groutd or 12 solidd
  10 groutd
  10 groutd
 

  7
  10 groutd
  10 groutd
  12 grout
 

  8
  10 groutd
  12 grout
  Footnote e
 

  9
  12 grout
  Footnote e
  Footnote e
 




For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 Pa.
 Mortar shall be Type M or S and masonry shall be laid in running bond. Ungrouted hollow masonry units are permitted except where otherwise indicated.
 Soil classes are in accordance with the Unified Soil Classification System. Refer to Table R405.1.
 Unbalanced backfill height is the difference in height between the exterior finish ground level and the lower of the top of the concrete footing that supports the foundation wall or the interior finish ground level. Where an interior concrete slab-on-grade is provided and is in contact with the interior surface of the foundation wall, measurement of the unbalanced backfill height from the exterior finish ground level to the top of the interior concrete slab is permitted.
 Solid indicates solid masonry unit; grout indicates grouted hollow units.
 Wall construction shall be in accordance with either Table R404.1.1(2), Table R404.1.1(3), Table R404.1.1(4), or a design shall be provided.
 The use of this table shall be prohibited for soil classifications not shown.
 


 


TABLE R404.1.1(2) 
 8-INCH MASONRY FOUNDATION WALLS
 WITH REINFORCING WHERE d ≥ 5 INCHESa, c, f

  WALL HEIGHT
  HEIGHT OF 
 UNBALANCED 
 BACKFILLe
  MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)b, c
 

  Soil classes and lateral soil loadd (psf per foot below grade)
 

  GW, GP, SW and SP soils 
 30
  GM, GC, SM, SM-SC and ML soils 
 45
  SC, ML-CL and inorganic CL soils 
 60
 

  6 feet 8 inches
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #4 at 48
 

  6 feet 8 inches
  #4 at 48
  #5 at 48
  #6 at 48
 

  7 feet 4 inches
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #4 at 48
 

  6 feet
  #4 at 48
  #5 at 48
  #5 at 48
 

  7 feet 4 inches
  #5 at 48
  #6 at 48
  #6 at 40
 

  8 feet
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #4 at 48
 

  6 feet
  #4 at 48
  #5 at 48
  #5 at 48
 

  7 feet
  #5 at 48
  #6 at 48
  #6 at 40
 

  8 feet
  #5 at 48
  #6 at 48
  #6 at 32
 

  8 feet 8 inches
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #5 at 48
 

  6 feet
  #4 at 48
  #5 at 48
  #6 at 48
 

  7 feet
  #5 at 48
  #6 at 48
  #6 at 40
 

  8 feet 8 inches
  #6 at 48
  #6 at 32
  #6 at 24
 

  9 feet 4 inches
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #5 at 48
 

  6 feet
  #4 at 48
  #5 at 48
  #6 at 48
 

  7 feet
  #5 at 48
  #6 at 48
  #6 at 40
 

  8 feet
  #6 at 48
  #6 at 40
  #6 at 24
 

  9 feet 4 inches
  #6 at 40
  #6 at 24
  #6 at 16
 

  10 feet
  4 feet (or less)
  #4 at 48
  #4 at 48
  #4 at 48
 

  5 feet
  #4 at 48
  #4 at 48
  #5 at 48
 

  6 feet
  #4 at 48
  #5 at 48
  #6 at 48
 

  7 feet
  #5 at 48
  #6 at 48
  #6 at 32
 

  8 feet
  #6 at 48
  #6 at 32
  #6 at 24
 

  9 feet
  #6 at 40
  #6 at 24
  #6 at 16
 

  10 feet
  #6 at 32
  #6 at 16
  #6 at 16
 



 
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot per foot = 0.157 kPa/mm.
 Mortar shall be Type M or S and masonry shall be laid in running bond.
 Alternative reinforcing bar sizes and spacings having an equivalent cross-sectional area of reinforcement per lineal foot of wall shall be permitted provided the spacing of the reinforcement does not exceed 72 inches in Seismic Design Categories A, B and C, and 48 inches in Seismic Design Categories D0, D1 and D2.
 Vertical reinforcement shall be Grade 60 minimum. The distance, d, from the face of the soil side of the wall to the center of vertical reinforcement shall be not less than 5 inches.
 Soil classes are in accordance with the Unified Soil Classification System and design lateral soil loads are for moist conditions without hydrostatic pressure. Refer to Table R405.1.
 Unbalanced backfill height is the difference in height between the exterior finish ground level and the lower of the top of the concrete footing that supports the foundation wall or the interior finish ground level. Where an interior concrete slab-on-grade is provided and is in contact with the interior surface of the foundation wall, measurement of the unbalanced backfill height from the exterior finish ground level to the top of the interior concrete slab is permitted.
 The use of this table shall be prohibited for soil classifications not shown.



 



TABLE R404.1.1(3)
  10-INCH MASONRY FOUNDATION WALLS
 WITH REINFORCING WHERE d ≥ 6.75 INCHESa, c, f


  WALL HEIGHT
  HEIGHT OF 
 UNBALANCED 
 BACKFILLe
  MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)b, c
 

  Soil classes and later soil loadd (psf per foot below grade)
 

  GW, GP, SW and SP soils 
 30
  GM, GC, SM, SM-SC and ML soils 
 45
  SC, ML-CL and inorganic CL soils 
 60
 

  6 feet 8 inches
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet 8 inches
  #4 at 56
  #5 at 56
  #5 at 56
 

  7 feet 4 inches
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet
  #4 at 56
  #4 at 56
  #5 at 56
 

  7 feet 4 inches
  #4 at 56
  #5 at 56
  #6 at 56
 

  8 feet
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet
  #4 at 56
  #4 at 56
  #5 at 56
 

  7 feet
  #4 at 56
  #5 at 56
  #6 at 56
 

  8 feet
  #5 at 56
  #6 at 56
  #6 at 48
 

  8 feet 8 inches
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet
  #4 at 56
  #4 at 56
  #5 at 56
 

  7 feet
  #4 at 56
  #5 at 56
  #6 at 56
 

  8 feet 8 inches
  #5 at 56
  #6 at 48
  #6 at 32
 

  9 feet 4 inches
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet
  #4 at 56
  #5 at 56
  #5 at 56
 

  7 feet
  #4 at 56
  #5 at 56
  #6 at 56
 

  8 feet
  #5 at 56
  #6 at 56
  #6 at 40
 

  9 feet 4 inches
  #6 at 56
  #6 at 40
  #6 at 24
 

  10 feet
  4 feet (or less)
  #4 at 56
  #4 at 56
  #4 at 56
 

  5 feet
  #4 at 56
  #4 at 56
  #4 at 56
 

  6 feet
  #4 at 56
  #5 at 56
  #5 at 56
 

  7 feet
  #5 at 56
  #6 at 56
  #6 at 48
 

  8 feet
  #5 at 56
  #6 at 48
  #6 at 40
 

  9 feet
  #6 at 56
  #6 at 40
  #6 at 24
 

  10 feet
  #6 at 48
  #6 at 32
  #6 at 24
 




For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot per foot = 0.157 kPa/mm.
 Mortar shall be Type M or S and masonry shall be laid in running bond.
 Alternative reinforcing bar sizes and spacings having an equivalent cross-sectional area of reinforcement per lineal foot of wall shall be permitted provided the spacing of the reinforcement does not exceed 72 inches in Seismic Design Categories A, B and C, and 48 inches in Seismic Design Categories D0, D1 and D2.
 Vertical reinforcement shall be Grade 60 minimum. The distance, d, from the face of the soil side of the wall to the center of vertical reinforcement shall be not less than 6.75 inches.
 Soil classes are in accordance with the Unified Soil Classification System and design lateral soil loads are for moist conditions without hydrostatic pressure. Refer to Table R405.1.
 Unbalanced backfill height is the difference in height between the exterior finish ground level and the lower of the top of the concrete footing that supports the foundation wall or the interior finish ground level. Where an interior concrete slab-on-grade is provided and is in contact with the interior surface of the foundation wall, measurement of the unbalanced backfill height from the exterior finish ground level to the top of the interior concrete slab is permitted.
 The use of this table shall be prohibited for soil classifications not shown.


 


TABLE R404.1.1(4)
  12-INCH MASONRY FOUNDATION WALLS
 WITH REINFORCING WHERE d ≥ 8.75 INCHESa, c, f

  WALL HEIGHT
  HEIGHT OF 
 UNBALANCED 
 BACKFILLe
  MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)b, c
 

 Soil classes and lateral soil loadd (psf per foot below grade)
 

  GW, GP, SW and SP soils 
 30
  GM, GC, SM, SM-SC and ML soils 
 45
  SC, ML-CL and inorganic CL soils 
 60
 

    6 feet 8 inches
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet 8 inches
    #4 at 72
    #4 at 72
    #5 at 72
  

    7 feet 4 inches
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet
    #4 at 72
    #4 at 72
    #5 at 72
  

    7 feet 4 inches
    #4 at 72
    #5 at 72
    #6 at 72
  

    8 feet
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet
    #4 at 72
    #4 at 72
    #5 at 72
  

    7 feet
    #4 at 72
    #5 at 72
    #6 at 72
  

    8 feet
    #5 at 72
    #6 at 72
    #6 at 64
  

    8 feet 8 inches
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet
    #4 at 72
    #4 at 72
    #5 at 72
  

    7 feet
    #4 at 72
    #5 at 72
    #6 at 72
  

    8 feet 8 inches
    #5 at 72
    #7 at 72
    #6 at 48
  

    9 feet 4 inches
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet
    #4 at 72
    #5 at 72
    #5 at 72
  

    7 feet
    #4 at 72
    #5 at 72
    #6 at 72
  

    8 feet
    #5 at 72
    #6 at 72
    #6 at 56
  

    9 feet 4 inches
    #6 at 72
    #6 at 48
    #6 at 40
  

    10 feet
    4 feet (or less)
    #4 at 72
    #4 at 72
    #4 at 72
  

    5 feet
    #4 at 72
    #4 at 72
    #4 at 72
  

    6 feet
    #4 at 72
    #5 at 72
    #5 at 72
  

    7 feet
    #4 at 72
    #6 at 72
    #6 at 72
  

    8 feet
    #5 at 72
    #6 at 72
    #6 at 48
  

    9 feet
    #6 at 72
    #6 at 56
    #6 at 40
  

    10 feet
    #6 at 64
    #6 at 40
    #6 at 32
  


 
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot per foot = 0.157 kPa/mm.
 Mortar shall be Type M or S and masonry shall be laid in running bond.
 Alternative reinforcing bar sizes and spacings having an equivalent cross-sectional area of reinforcement per lineal foot of wall shall be permitted provided the spacing of the reinforcement does not exceed 72 inches in Seismic Design Categories A, B and C, and 48 inches in Seismic Design Categories D0, D1 and D2.
 Vertical reinforcement shall be Grade 60 minimum. The distance, d, from the face of the soil side of the wall to the center of vertical reinforcement shall be not less than 8.75 inches.
 Soil classes are in accordance with the Unified Soil Classification System and design lateral soil loads are for moist conditions without hydrostatic pressure. Refer to Table R405.1.
 Unbalanced backfill height is the difference in height between the exterior finish ground level and the lower of the top of the concrete footing that supports the foundation wall or the interior finish ground levels. Where an interior concrete slab-on-grade is provided and in contact with the interior surface of the foundation wall, measurement of the unbalanced backfill height is permitted to be measured from the exterior finish ground level to the top of the interior concrete slab is permitted.
 The use of this table shall be prohibited for soil classifications not shown.

TABLE R404.1.1(1)
PLAIN MASONRY FOUNDATION WALLS^f
MAXIMUM WALL HEIGHT (feet)	MAXIMUM UNBALANCED BACKFILL HEIGHT^c (feet)	PLAIN MASONRY^a MINIMUM NOMINAL WALL THICKNESS (inches)
Soil classes^b
GW, GP, SW and SP	GM, GC, SM, SM-SC and ML	SC, MH, ML-CL and inorganic CL
5	4	6 solid^d or 8	6 solid^d or 8	6 solid^d or 8
5	6 solid^d or 8	8	10
6	4	6 solid^d or 8	6 solid^d or 8	6 solid^d or 8
5	6 solid^d or 8	8	10
6	8	10	12
7	4	6 solid^d or 8	8	8
5	6 solid^d or 8	10	10
6	10	12	10 solid^d
7	12	10 solid^d	12 solid^d
8	4	6 solid^d or 8	6 solid^d or 8	8
5	6 solid^d or 8	10	12
6	10	12	12 solid^d
7	12	12 solid^d	Footnote e
8	10 grout^d	12 grout^d	Footnote e
9	4	6 grout^d or 8 solid^d or 12	6 grout^d or 8 solid^d	8 grout^d or 10 solid^d
5	6 grout^d or 10 solid^d	8 grout^d or 12 solid^d	8 grout^d
6	8 grout^d or 12 solid^d	10 grout^d	10 grout^d
7	10 grout^d	10 grout^d	12 grout
8	10 grout^d	12 grout	Footnote e
9	12 grout	Footnote e	Footnote e

TABLE R404.1.1(2)
8-INCH MASONRY FOUNDATION WALLS
WITH REINFORCING WHERE d ≥ 5 INCHES^{a, c, f}
WALL HEIGHT	HEIGHT OF UNBALANCED BACKFILL^e	MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)^{b, c}
Soil classes and lateral soil load^d (psf per foot below grade)
GW, GP, SW and SP soils 30	GM, GC, SM, SM-SC and ML soils 45	SC, ML-CL and inorganic CL soils 60
6 feet 8 inches	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#4 at 48
6 feet 8 inches	#4 at 48	#5 at 48	#6 at 48
7 feet 4 inches	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#4 at 48
6 feet	#4 at 48	#5 at 48	#5 at 48
7 feet 4 inches	#5 at 48	#6 at 48	#6 at 40
8 feet	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#4 at 48
6 feet	#4 at 48	#5 at 48	#5 at 48
7 feet	#5 at 48	#6 at 48	#6 at 40
8 feet	#5 at 48	#6 at 48	#6 at 32
8 feet 8 inches	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#5 at 48
6 feet	#4 at 48	#5 at 48	#6 at 48
7 feet	#5 at 48	#6 at 48	#6 at 40
8 feet 8 inches	#6 at 48	#6 at 32	#6 at 24
9 feet 4 inches	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#5 at 48
6 feet	#4 at 48	#5 at 48	#6 at 48
7 feet	#5 at 48	#6 at 48	#6 at 40
8 feet	#6 at 48	#6 at 40	#6 at 24
9 feet 4 inches	#6 at 40	#6 at 24	#6 at 16
10 feet	4 feet (or less)	#4 at 48	#4 at 48	#4 at 48
5 feet	#4 at 48	#4 at 48	#5 at 48
6 feet	#4 at 48	#5 at 48	#6 at 48
7 feet	#5 at 48	#6 at 48	#6 at 32
8 feet	#6 at 48	#6 at 32	#6 at 24
9 feet	#6 at 40	#6 at 24	#6 at 16
10 feet	#6 at 32	#6 at 16	#6 at 16

TABLE R404.1.1(3)
10-INCH MASONRY FOUNDATION WALLS
WITH REINFORCING WHERE d ≥ 6.75 INCHES^{a, c, f}
WALL HEIGHT	HEIGHT OF UNBALANCED BACKFILL^e	MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)^{b, c}
Soil classes and later soil load^d (psf per foot below grade)
GW, GP, SW and SP soils 30	GM, GC, SM, SM-SC and ML soils 45	SC, ML-CL and inorganic CL soils 60
6 feet 8 inches	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet 8 inches	#4 at 56	#5 at 56	#5 at 56
7 feet 4 inches	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet	#4 at 56	#4 at 56	#5 at 56
7 feet 4 inches	#4 at 56	#5 at 56	#6 at 56
8 feet	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet	#4 at 56	#4 at 56	#5 at 56
7 feet	#4 at 56	#5 at 56	#6 at 56
8 feet	#5 at 56	#6 at 56	#6 at 48
8 feet 8 inches	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet	#4 at 56	#4 at 56	#5 at 56
7 feet	#4 at 56	#5 at 56	#6 at 56
8 feet 8 inches	#5 at 56	#6 at 48	#6 at 32
9 feet 4 inches	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet	#4 at 56	#5 at 56	#5 at 56
7 feet	#4 at 56	#5 at 56	#6 at 56
8 feet	#5 at 56	#6 at 56	#6 at 40
9 feet 4 inches	#6 at 56	#6 at 40	#6 at 24
10 feet	4 feet (or less)	#4 at 56	#4 at 56	#4 at 56
5 feet	#4 at 56	#4 at 56	#4 at 56
6 feet	#4 at 56	#5 at 56	#5 at 56
7 feet	#5 at 56	#6 at 56	#6 at 48
8 feet	#5 at 56	#6 at 48	#6 at 40
9 feet	#6 at 56	#6 at 40	#6 at 24
10 feet	#6 at 48	#6 at 32	#6 at 24

TABLE R404.1.1(4)
12-INCH MASONRY FOUNDATION WALLS
WITH REINFORCING WHERE d ≥ 8.75 INCHES^{a, c, f}
WALL HEIGHT	HEIGHT OF UNBALANCED BACKFILL^e	MINIMUM VERTICAL REINFORCEMENT AND SPACING (INCHES)^{b, c}
Soil classes and lateral soil load^d(psf per foot below grade)
GW, GP, SW and SP soils 30	GM, GC, SM, SM-SC and ML soils 45	SC, ML-CL and inorganic CL soils 60
6 feet 8 inches	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet 8 inches	#4 at 72	#4 at 72	#5 at 72
7 feet 4 inches	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet	#4 at 72	#4 at 72	#5 at 72
7 feet 4 inches	#4 at 72	#5 at 72	#6 at 72
8 feet	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet	#4 at 72	#4 at 72	#5 at 72
7 feet	#4 at 72	#5 at 72	#6 at 72
8 feet	#5 at 72	#6 at 72	#6 at 64
8 feet 8 inches	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet	#4 at 72	#4 at 72	#5 at 72
7 feet	#4 at 72	#5 at 72	#6 at 72
8 feet 8 inches	#5 at 72	#7 at 72	#6 at 48
9 feet 4 inches	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet	#4 at 72	#5 at 72	#5 at 72
7 feet	#4 at 72	#5 at 72	#6 at 72
8 feet	#5 at 72	#6 at 72	#6 at 56
9 feet 4 inches	#6 at 72	#6 at 48	#6 at 40
10 feet	4 feet (or less)	#4 at 72	#4 at 72	#4 at 72
5 feet	#4 at 72	#4 at 72	#4 at 72
6 feet	#4 at 72	#5 at 72	#5 at 72
7 feet	#4 at 72	#6 at 72	#6 at 72
8 feet	#5 at 72	#6 at 72	#6 at 48
9 feet	#6 at 72	#6 at 56	#6 at 40
10 feet	#6 at 64	#6 at 40	#6 at 32

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R404.1.1 Foundations, Design Required

Concrete or masonry foundation walls shall be designed in accordance with accepted engineering practice where either of the following conditions ...

Residential Code 2015 of Utah > 4 Foundations > R404 Foundation and Retaining Walls > R404.1 Concrete and Masonry Foundation Walls > R404.1.1 Design Required

R606.12.3.1 Wall Construction, Design Requirements

Masonry elements other than those covered by Section R606.12.2.2.2 shall be designed in accordance with the requirements of Chapters 1 through 7 ...

Residential Code 2015 of Utah > 6 Wall Construction > R606 General Masonry Construction > R606.12 Seismic Requirements > R606.12.3 Seismic Design Category D₀ or D₁ > R606.12.3.1 Design Requirements

1003.4.2.1 Traps, Interceptors and Separators, General Design Requirements

Oil separators shall have a depth of not less than 2 feet (610 mm) below the invert of the discharge drain. The outlet opening of the separator shall ...

Plumbing Code 2015 of Utah > 10 Traps, Interceptors and Separators > 1003 Interceptors and Separators > 1003.4 Oil Separators Required > 1003.4.2 Oil Separator Design > 1003.4.2.1 General Design Requirements

Section 1604 Structural Design, General Design Requirements

• Designated emergency preparedness, communications and operations centers and other facilities required for emergency response. • Power-generating ...

Building Code 2015 of Utah > 16 Structural Design > 1604 General Design Requirements

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