Concrete Box Culverts with Skews > 30 Degrees and Design...
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All Regional Engineers Omer M. Osman, P.E. Special Provision for Concrete Box Culverts with Skews > 30 Degrees and Design Fills ≤ 5 Feet January 9, 2015 This special provision was developed by the Bureau of Bridges and Structures as a result of the implementation of AASHTO Load and Resistance Factor Design (LRFD) for precast and cast-in-place concrete box culverts. This special provision has been revised as a result of changes to ASTM C 1577 and reducing the number of significant digits to match those shown in ASTM C 1577. This special provision should be inserted into contracts with precast concrete or cast-in-place box culverts having a skew > 30 degrees and a design fill ≤ 5 feet. The districts should include the BDE Check Sheet marked with the applicable special provisions for the April 24, 2015 and subsequent lettings. The Project Development and Implementation Section will include a copy in the contract. This special provision will be available on the transfer directory January 9, 2015. 80293m
Transcript of Concrete Box Culverts with Skews > 30 Degrees and Design...
All Regional Engineers
Omer M. Osman, P.E.
Special Provision for Concrete Box Culverts with Skews > 30 Degrees and Design Fills ≤ 5 Feet
January 9, 2015
This special provision was developed by the Bureau of Bridges and Structures as a result of the implementation of AASHTO Load and Resistance Factor Design (LRFD) for precast and cast-in-place concrete box culverts. This special provision has been revised as a result of changes to ASTM C 1577 and reducing the number of significant digits to match those shown in ASTM C 1577. This special provision should be inserted into contracts with precast concrete or cast-in-place box culverts having a skew > 30 degrees and a design fill ≤ 5 feet. The districts should include the BDE Check Sheet marked with the applicable special provisions for the April 24, 2015 and subsequent lettings. The Project Development and Implementation Section will include a copy in the contract. This special provision will be available on the transfer directory January 9, 2015. 80293m
CONCRETE BOX CULVERTS WITH SKEWS > 30 DEGREES AND DESIGN FILLS ≤ 5 FEET (BDE) Effective: April 1, 2012 Revised: April 1, 2014April 1, 2015 Revise the second paragraph of Article 540.04 of the Standard Specifications to read:
“ Unless otherwise noted on the plans, the Contractor shall have the option, when a cast-in-place concrete box culvert is specified, of constructing the box culvert using precast box culvert sections when the design cover is 6 in. (150 mm) minimum. The precast box culvert sections shall be designed for the same design cover shown on the plans for cast-in-place box culvert; shall be of equal or larger size opening, and shall satisfy the design requirements of ASTM C 1577.”
Add the following after the seventh paragraph of Article 540.06 of the Standard Specifications:
“ Precast concrete box culverts with skews greater than 30 degrees and having design covers less than or equal to 5 feet are not covered by the standard design table shown in ASTM C 1577. The design table provided herein is provided to address this design range. The same notes, reinforcement configurations, clearances, and requirements of ASTM C 1577 apply to this special design table. A box designated 7 x 6 x 8 indicates a span of 7 ft, a rise of 6 ft, and top slab, bottom slab, walls and haunches of 8 in. unless otherwise noted on the tables.
3 ft by x 2 ft by x 4 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1680.17
0.9001.10
0.2950.30
0.0960.10
0.2690.28
0.1680.17
0.8530.92
0.1440.14
2<3 0.1340.14
0.1800.18
0.1820.19
0.0960.10
31
3-5 0.0960.10
0.1150.12
0.1170.12
0.0960.10
29
*top slab 7.0 in., bottom slab 6.0 in.
3 ft by x 3 ft by x 4 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1680.17
0.9561.17
0.3260.33
0.0960.10
0.2900.31
0.1680.17
0.8490.92
0.1440.14
2<3 0.1010.10
0.2140.22
0.2180.22
0.0960.10 31
3-5 0.0960.10
0.1360.14
0.1400.14
0.0960.10 31
*top slab 7.0 in., bottom slab 6.0 in.
4 ft by x 2 ft by x 5 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.2040.21
0.7900.88
0.2620.26
0.1200.12
0.2680.28
0.1800.18
0.8460.89
0.1440.14
2<3 0.2010.20
0.2030.21
0.1960.20
0.1200.12 3233
3-5 0.1290.13
0.1340.13
0.1360.14
0.1200.12 32
*top slab 7.5 in., bottom slab 6.0 in.
4 ft by x 3 ft by x 5 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1800.18
0.8761.02
0.3030.31
0.1200.12
0.3050.32
0.1800.18
0.8310.87
0.1440.14
2<3 0.1600.16
0.2450.25
0.2380.24
0.1200.12 38
3-5 0.1200.12
0.1610.16
0.1650.17
0.1200.12 3534
*top slab 7.5 in., bottom slab 6.0 in.
4 ft by x 4 ft by x 5 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1800.18
0.9271.08
0.3340.34
0.1200.12
0.3270.34
0.1800.18
0.8220.86
0.1440.14
2<3 0.1300.13
0.2770.28
0.2700.27
0.1200.12 38
3-5 0.1200.12
0.1810.18
0.1880.19
0.1200.12 38
*top slab 7.5 in., bottom slab 6.0 in.
5 ft x 2 ft x 6 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.27 0.63 0.23 0.14 0.24 0.19 0.19 0.17
2<3 0.25 0.22 0.20 0.14 37
3-5 0.17 0.15 0.15 0.14 35
*top slab 8.0 in., bottom slab 7.0 in.
5 ft by x 3 ft by x 6 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1970.20
0.6820.72
0.2690.27
0.1440.14
0.2800.29
0.1920.19
0.705.0.71
0.1680.17
2<3 0.2060.21
0.2590.26
0.2460.25
0.1440.14 37
3-5 0.1440.14
0.1800.18
0.1790.18
0.1440.14 35
*top slab 8.0 in., bottom slab 7.0 in.
5 ft by x 4 ft by x 6 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1920.19
0.7350.78
0.2990.30
0.1440.14
0.3070.31
0.1920.19
0.6930.70
0.1680.17
2<3 0.1800.18
0.2940.30
0.2820.28
0.1440.14 4645
3-5 0.1440.14
0.2040.20
0.2050.21
0.1440.14 40
*top slab 8.0 in., bottom slab 7.0 in.
5 ft by x 5 ft by x 6 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.1920.19
0.7740.82
0.3240.33
0.1440.14
0.3270.34
0.1920.19
0.6850.69
0.1680.17
2<3 0.1550.16
0.3220.33
0.3120.32
0.1440.14 45
3-5 0.1440.14
0.2240.22
0.2280.23
0.1440.14 45
*top slab 8.0 in., bottom slab 7.0 in.
6 ft x 2 ft x 7 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.33 0.51 0.21 0.17 0.23 0.19 0.61 0.17
2<3 0.31 0.22 0.22 0.17 42
3-5 0.22 0.17 0.17 0.17 41
*top slab 8.0 in.
6 ft by x 3 ft by x 7 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.2700.27
0.5660.58
0.2570.26
0.1680.17
0.2630.27
0.1920.19
0.5750.58
0.1680.17
2<3 0.2600.26
0.2690.27
0.2730.27
0.1680.17 41
3-5 0.1860.18
0.1920.19
0.1970.20
0.1680.17 39
*top slab 8.0 in.
6 ft by x 4 ft by x 7 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.2450.25
0.6170.64
0.2970.30
0.1680.17
0.2930.30
0.1920.19
0.5650.57
0.1680.17
2<3 0.2250.23
0.3050.31
0.3130.31
0.1680.17 42
3-5 0.1680.17
0.2200.22
0.2270.23
0.1680.17 41
*top slab 8.0 in.
6 ft by x 5 ft by x 7 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in. / ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.2260.23
0.6570.68
0.3310.33
0.1680.17
0.3170.32
0.1920.19
0.5510.56
0.1680.17
2<3 0.1980.20
0.3380.34
0.3480.35
0.1680.17 5952
3-5 0.1680.17
0.2420.24
0.2520.25
0.1680.17 48
*top slab 8.0 in.
6 ft by x 6 ft by x 7 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2* 0.2080.21
0.6920.72
0.3630.37
0.1680.17
0.3370.34
0.1920.19
0.5400.55
0.1680.17
2<3 0.1760.18
0.3640.37
0.3790.38
0.1680.17 52
3-5 0.1680.17
0.2610.26
0.2750.28
0.1680.17 52
*top slab 8.0 in.
7 ft x 2 ft x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.38 0.60 0.26 0.19 0.22 0.19 0.75 0.19
2<3 0.38 0.24 0.24 0.19 46
3-5 0.27 0.19 0.19 0.19 44
7 ft x 3 ft x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.36 0.57 0.32 0.19 0.25 0.19 0.71 0.19
2<3 0.33 0.29 0.30 0.19 44
3-5 0.23 0.21 0.21 0.19 42
7 ft by x 4 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3390.34
0.5990.61
0.3720.37
0.1920.19
0.2710.27
0.1920.19
0.6970.70
0.1920.19
2<3 0.2870.29
0.3350.34
0.3420.34
0.1920.19 44
3-5 0.2060.21
0.2410.24
0.2480.25
0.1920.19 42
7 ft by x 5 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3170.32
0.6370.65
0.4170.42
0.1920.19
0.2930.30
0.1920.19
0.6840.69
0.1920.19
2<3 0.2560.26
0.3700.37
0.3810.38
0.1920.19 49
3-5 0.1920.19
0.2660.27
0.2760.28
0.1920.19 46
7 ft by x 6 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2960.29
0.6720.69
0.4580.46
0.1920.19
0.3120.32
0.1920.19
0.6580.67
0.1920.19
2<3 0.2300.23
0.4010.40
0.4160.42
0.1920.19 59
3-5 0.1920.19
0.2880.29
0.3020.30
0.1920.19 55
7 ft by x 7 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2760.27
0.7030.73
0.4960.50
0.1920.19
0.3300.34
0.1920.19
0.6530.65
0.1920.19
2<3 0.2100.21
0.4280.43
0.4470.45
0.1920.19 59
3-5 0.1920.19
0.3070.31
0.3260.33
0.1920.19 59
8 ft x 2 ft x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.47 0.50 0.29 0.19 0.23 0.19 0.61 0.19
2<3 0.51 0.30 0.31 0.19 50
3-5 0.36 0.22 0.22 0.19 48
8 ft x 3 ft x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.43 0.49 0.35 0.19 0.26 0.19 0.58 0.19
2<3 0.45 0.36 0.37 0.19 48
3-5 0.32 0.26 0.27 0.19 45
8 ft by x 4 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3970.40
0.5100.52
0.4000.40
0.1920.19
0.2830.29
0.1920.19
0.5680.57
0.1920.19
2<3 0.3990.40
0.4150.42
0.4230.43
0.1920.19 45
3-5 0.2850.28
0.2980.30
0.3060.31
0.1920.19 45
8 ft by x 5 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3680.37
0.5550.56
0.4460.45
0.1920.19
0.3050.31
0.1920.19
0.5590.56
0.1920.19
2<3 0.3600.36
0.4580.46
0.4700.47
0.1920.19 48
3-5 0.2590.26
0.3280.33
0.3400.34
0.1920.19 45
8 ft by x 6 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3420.34
0.5960.61
0.4880.49
0.1920.19
0.3250.33
0.1920.19
0.5560.56
0.1920.19
2<3 0.3280.33
0.4960.50
0.5120.52
0.1920.19 56
3-5 0.2370.24
0.3550.36
0.3710.37
0.1920.19 50
8 ft by x 7 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3190.32
0.6330.65
0.5270.53
0.1920.19
0.3430.35
0.1920.19
0.5550.56
0.1920.19
2<3 0.3010.30
0.5290.53
0.5510.56
0.1920.19 65
3-5 0.2190.22
0.3790.38
0.3990.40
0.1920.19 61
8 ft by x 8 ft by x 8 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2970.30
0.6680.69
0.5650.57
0.1920.19
0.3600.36
0.1920.19
0.5310.55
0.1920.19
2<3 0.2800.28
0.5600.56
0.5870.59
0.1920.19 65
3-5 0.2040.20
0.4000.40
0.4270.43
0.1920.19 65
9 ft x 2 ft x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.46 0.35 0.26 0.22 0.22 0.22 0.47 0.22
2<3 0.58 0.32 0.32 0.22 55
3-5 0.41 0.23 0.23 0.22 52
9 ft x 3 ft x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.42 0.35 0.32 0.22 0.23 0.22 0.47 0.22
2<3 0.52 0.38 0.39 0.22 52
3-5 0.37 0.27 0.28 0.22 49
9 ft x 4 ft x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.38 0.38 0.36 0.22 0.25 0.22 0.47 0.22
2<3 0.47 0.44 0.45 0.22 52
3-5 0.33 0.31 0.32 0.22 49
9 ft by x 5 ft by x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3610.35
0.4110.41
0.4160.41
0.2160.22
0.2750.28
0.2160.22
0.4650.47
0.2160.22
2<3 0.4250.43
0.4840.49
0.4960.50
0.2160.22 49
3-5 0.3060.30
0.3480.35
0.3600.36
0.2160.22 49
9 ft by x 6 ft by x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in. / ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3350.32
0.4390.44
0.4550.44
0.2160.22
0.2940.29
0.2160.22
0.4670.47
0.2160.22
2<3 0.3900.39
0.5240.53
0.5410.54
0.2160.22 55
3-5 0.2820.28
0.3760.38
0.3930.39
0.2160.22 52
9 ft by x 7 ft by x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in. / ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3130.30
0.4640.46
0.4910.48
0.2160.22
0.3110.31
0.2160.22
0.4530.45
0.2160.22
2<3 0.3600.36
0.5610.56
0.5830.59
0.2160.22 64
3-5 0.2620 0.4020 0.423 0.216 58
.26 .40 0.42 0.22
9 ft by x 8 ft by x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2860.28
0.4880.49
0.5140.52
0.2160.22
0.3270.33
0.2160.22
0.4540.45
0.2160.22
2<3 0.3360.33
0.5940.60
0.6210.63
0.2160.22 72
3-5 0.2440.24
0.4260.43
0.4530.45
0.2160.22 7372
9 ft by x 9 ft by x 9 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2740.27
0.5110.51
0.5570.55
0.2160.22
0.3420.34
0.2160.22
0.4520.45
0.2160.22
2<3 0.3160.31
0.6250.63
0.6590.66
0.2160.22 72
3-5 0.2310.23
0.4480.45
0.4810.48
0.2160.22 72
10 ft x 2 ft x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.46 0.29 0.24 0.24 0.24 0.24 0.34 0.24
2<3 0.66 0.33 0.34 0.24 59
3-5 0.46 0.24 0.24 0.24 59
10 ft x 3 ft x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.44 0.33 0.30 0.24 0.24 0.24 0.24 0.24
2<3 0.59 0.40 0.41 0.24 59
3-5 0.42 0.29 0.29 0.24 56
10 ft x 4 ft x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.40 0.36 0.35 0.24 0.24 0.24 0.24 0.24
2<3 0.54 0.46 0.47 0.24 56
3-5 0.38 0.33 0.34 0.24 52
10 ft by x 5 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3700.37
0.3930.39
0.3920.39
0.2400.24
0.2630.26
0.2400.24
0.2400.24
0.2400.24
2<3 0.4920.49
0.5090.51
0.5220.52
0.2400.24 52
3-5 0.3540.35
0.3660.36
0.3790.38
0.2400.24 52
10 ft by x 6 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3480.34
0.4200.42
0.4320.43
0.2400.24
0.2820.28
0.2400.24
0.4180.42
0.2400.24
2<3 0.4550.45
0.5520.55
0.5700.57
0.2400.24 56
3-5 0.3290.33
0.3970.40
0.4140.41
0.2400.24 52
10 ft by x 7 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3210.32
0.4450.44
0.4630.46
0.2400.24
0.2980.30
0.2400.24
0.2400.24
0.2400.24
2<3 0.4230.42
0.5910.59
0.6140.62
0.2400.24 59
3-5 0.3070.31
0.4250.42
0.4470.45
0.2400.24 56
10 ft by x 8 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in. / ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3010.30
0.4690.47
0.4960.50
0.2400.24
0.3140.31
0.2400.24
0.2400.24
0.2400.24
2<3 0.3940.39
0.6270.63
0.6550.66
0.2400.24 7275
3-5 0.2880.29
0.4510.45
0.4780.48
0.2400.24 66
10 ft by x 9 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2840.28
0.4920.49
0.5270.53
0.2400.24
0.3290.33
0.2400.24
0.2400.24
0.2400.24
2<3 0.3710.37
0.6600.66
0.6940.70
0.2400.24 79
3-5 0.2720.27
0.4750.47
0.5080.51
0.2400.24 8579
10 ft by x 10 ft by x 10 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2720.27
0.5140.51
0.5590.56
0.2400.24
0.3440.34
0.2400.24
0.2400.24
0.2400.24
2<3 0.3530.35
0.6910.69
0.7320.74
0.2400.24 79
3-5 0.2590.26
0.4970.50
0.5370.54
0.2400.24 79
11 ft x 2 ft x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.50 0.27 0.26 0.26 0.26 0.26 0.26 0.26
2<3 0.73 0.35 0.35 0.26 67
3-5 0.52 0.26 0.26 0.26 63
11 ft x 3 ft x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.45 0.31 0.29 0.26 0.26 0.26 0.26 0.26
2<3 0.67 0.42 0.43 0.26 63
3-5 0.47 0.30 0.31 0.26 60
11 ft by x 4 ft by x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.4140.41
0.3410.34
0.3330.33
0.2640.26
0.2640.26
0.2640.26
0.2640.26
0.2640.26
2<3 0.6090.61
0.4810.48
0.4910.49
0.2640.26 60
3-5 0.4360.43
0.3480.35
0.3570.35
0.2640.26 56
11 ft by x 6 ft by x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3560.35
0.3990.40
0.4070.40
0.2640.26
0.2650.26
0.2640.26
0.2640.26
0.2640.26
2<3 0.5210.52
0.5800.58
0.5970.60
0.2640.26 56
3-5 0.3770.37
0.4180.42
0.4350.43
0.2640.26 56
11 ft by x 8 ft by x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3140.31
0.4490.45
0.4710.47
0.2640.26
0.2980.30
0.2640.26
0.2640.26
0.2640.26
2<3 0.4570.45
0.6590.66
0.6870.69
0.2640.26 67
3-5 0.3330.33
0.4750.47
0.5020.50
0.2640.26 63
11 ft by x 10 ft by x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2850.28
0.4940.49
0.5320.53
0.2640.26
0.3280.33
0.2640.26
0.2640.26
0.2640.26
2<3 0.4090.41
0.7270.73
0.7690.77
0.2640.26 86
3-5 0.3000.30
0.5240.52
0.5650.56
0.2640.26 86
11 ft by x 11 ft by x 11 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2760.27
0.5160.51
0.5620.56
0.2640.26
0.3420.34
0.2640.26
0.2640.26
0.2640.26
2<3 0.3910.39
0.7580.76
0.8080.81
0.2640.26 86
3-5 0.2890.29
0.5480.55
0.5960.59
0.2640.26 86
12 ft x 2 ft x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.51 0.29 0.29 0.29 0.29 0.29 0.29 0.29
2<3 0.81 0.37 0.37 0.29 71
3-5 0.57 0.29 0.29 0.29 68
12 ft x 3 ft x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.46 0.29 0.29 0.29 0.29 0.29 0.29 0.29
2<3 0.74 0.44 0.44 0.29 68
3-5 0.53 0.32 0.32 0.29 64
12 ft by x 4 ft by x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.4260.42
0.3290.33
0.3160.31
0.2880.29
0.2880.29
0.2880.29
0.3210.29
0.2880.29
2<3 0.6820.68
0.5030.50
0.5120.51
0.2880.29 64
3-5 0.4890.49
0.3640.36
0.3730.37
0.2880.29 60
12 ft by x 6 ft by x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3670.36
0.3850.38
0.3870.38
0.2880.29
0.2880.29
0.2880.29
0.3200.29
0.2880.29
2<3 0.5900.59
0.6060.60
0.6240.62
0.2880.29 60
3-5 0.4270.42
0.4380.44
0.4560.45
0.2880.29 56
12 ft by x 8 ft by x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.3260.32
0.4350.43
0.4490.45
0.2880.29
0.2880.29
0.2880.29
0.2880.29
0.2880.29
2<3 0.5210.52
0.6900.69
0.7190.72
0.2880.29 67
3-5 0.3810.38
0.4990.50
0.5270.52
0.2880.29 64
12 ft by x 10 ft by x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2980.29
0.4810.48
0.5070.50
0.2880.29
0.3050.30
0.2880.29
0.2880.29
0.2880.29
2<3 0.4670.46
0.7620.76
0.8040.80
0.2880.29 93
3-5 0.3440.34
0.5510.55
0.5920.59
0.2880.29 79
12 ft by x 12 ft by x 12 in.
Design Earth
Cover, ft.
Circumferential Reinforcement Areas, sq in./ ft.
As1 As2 As3 As4 As5 As6 As7 As8 “M”, in.
0<2 0.2880.29
0.5250.52
0.5660.56
0.2880.29
0.3330.33
0.2880.29
0.2880.29
0.2880.29
2<3 0.4310.43
0.8270.83
0.8860.89
0.2880.29 93
3-5 0.3200.32
0.5990.60
0.6560.65
0.2880.29 93”
80293
