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STANDARD SIZE BOX CULVERT

Standard Size Box Culvert

TABLE 1

Nominal Size Dimensions Weight (tonnes)
b h B H tb  G J M LID Invert
600 300 740 370 70 140 128   0.25 0.25
450 740 520 70 140 128   0.25 0.29
600 740 670 70 140 128   0.25 0.34
750 450 910 530 80 140 128   0.31 0.38
600 910 680 80 140 128   0.31 0.44
750 910 830 80 140 128   0.31 0.50
900 450 1060 530 80 140 100 225 0.33 0.41
600 1060 680 80 140 100 225 0.33 0.47
750 1060 830 80 140 100 225 0.33 0.52
900 1060 980 80 140 100 225 0.33 0.58
1200 600 1390 695 95 150 110 225 0.48 0.62
750 1390 845 95 150 110 225 0.48 0.69
900 1390 995 95 150 110 225 0.48 0.76
1050 1390 1145 95 150 110 225 0.48 0.83
1200 1390 1295 95 150 110 225 0.48 0.90
1500 750 1700 850 100 175 125 300 0.66 0.84
900 1700 1000 100 175 125 300 0.66 0.91
1050 1700 1150 100 175 125 300 0.66 0.98
1200 1700 1300 100 175 125 300 0.66 1.05
1350 1700 1450 100 175 125 300 0.66 1.13
1500 1700 1600 100 175 125 300 0.66 1.21
1800 900 2030 1015 115 175 125 300 0.79 1.14
1050 2030 1165 115 175 125 300 0.79 1.22
1200 2030 1315 115 175 125 300 0.79 1.31
1350 2030 1465 115 175 125 300 0.79 1.39
1500 2030 1615 115 175 125 300 0.79 1.48
1650 2030 1765 115 175 125 300 0.79 1.57
1800 2030 1915 115 175 125 300 0.79 1.65

tc = tb for b = 600,900,1500 and 1800
tc = 50 for b = 1200

TABLE 2

Nominal Size Dimensions Weight (tonnes)
b h B H tb  C tc e LID Invert
600 300 740 440 70 300 70 70 0.25 0.33
450 740 590 70 300 70 70 0.25 0.39
600 740 740 70 300 70 70 0.25 0.44
750 450 910 610 80 450 80 80 0.31 0.50
600 910 760 80 450 80 80 0.31 0.56
750 910 910 80 450 80 80 0.31 0.62
900 450 1060 610 80 450 80 80 0.33 0.55
600 1060 760 80 450 80 80 0.33 0.61
750 1060 910 80 450 80 80 0.33 0.66
900 1060 1060 80 450 80 80 0.33 0.72
1200 600 1390 920 95 1075 50 225 0.48 0.97
750 1390 1070 95 1075 50 225 0.48 1.05
900 1390 1220 95 1075 50 225 0.48 1.11
1050 1390 1370 95 1075 50 225 0.48 1.19
1200 1390 1520 95 1075 50 225 0.48 1.25
1500 750 1700 1075 100 1075 100 225 0.66 1.35
900 1700 1225 100 1075 100 225 0.66 1.42
1050 1700 1375 100 1075 100 225 0.66 1.50
1200 1700 1525 100 1075 100 225 0.66 1.58
1350 1700 1675 100 1075 100 225 0.66 1.65
1500 1700 1825 100 1075 100 225 0.66 1.72
1800 900 2030 1240 115 1075 115 225 0.79 1.83
1050 2030 1390 115 1075 115 225 0.79 1.92
1200 2030 1540 115 1075 115 225 0.79 2.00
1350 2030 1690 115 1075 115 225 0.79 2.09
1500 2030 1840 115 1075 115 225 0.79 2.17
1650 2030 1990 115 1075 115 225 0.79 2.26
1800 2030 2140 115 1075 115 225 0.79 2.34

SUPER SIZE BOX CULVERT

Super Size Box Culvert

TABLE 3

Nominal Size
mm x mm		 Dimensions Weight (tonnes)
b h B D LID Invert
W/O DWF C/W DWF
2100

x 1200
  x 1500
  x 1800
  x 2100
2100 1200 2500 255 1.62 2.59 3.50
2100 1500 2500 255 1.62 2.89 3.80
2100 1800 2500 255 1.62 3.20 4.10
2100 2100 2500 255 1.62 3.50 4.40
2400 x 1200
  x 1500
  x 1800
  x 2100
  x 2400
2400 1200 2800 255 1.83 2.76 3.82
2400 1500 2800 255 1.83 3.07 4.12
2400 1800 2800 255 1.83 3.38 4.42
2400 2100 2800 255 1.83 3.68 4.72
2400 2400 2800 255 1.83 3.99 5.02
2700 x 1500
  x 1800
  x 2100
  x 2400
  x 2700
2700 1500 3100 255 2.04 3.26 4.45
2700 1800 3100 255 2.04 3.57 4.75
2700 2100 3100 255 2.04 3.88 5.04
2700 2400 3100 255 2.04 4.19 5.34
2700 2700 3100 255 2.04 4.50 5.64
3000 x 1500
  x 1800
  x 2100
  x 2400
  x 2700
  x 3000
3000 1500 3400 255 2.26 3.44 4.77
3000 1800 3400 255 2.26 3.76 5.07
3000 2100 3400 255 2.26 4.07 5.37
3000 2400 3400 255 2.26 4.38 5.66
3000 2700 3400 255 2.26 4.69 5.96
3000 3000 3400 255 2.26 5.00 6.26
3300 x 1800
  x 2100
  x 2400
  x 2700
  x 3000
3300 1800 3700 255 2.70 3.96 5.39
3300 2100 3700 255 2.70 4.27 5.69
3300 2400 3700 255 2.70 4.59 5.99
3300 2700 3700 255 2.70 4.91 6.29
3300 3000 3700 255 2.70 5.22 6.58
3600 x 1800
  x 2100
  x 2400
  x 2700
  x 3000
3600 1800 4000 255 2.95 4.19 5.71
3600 2100 4000 255 2.95 4.50 6.01
3600 2400 4000 255 2.95 4.82 6.31
3600 2700 4000 255 2.95 5.13 6.61
3600 3000 4000 255 2.95 5.45 6.91

Features of Alliance Precast Industries (API)

API Box Culverts are available in both Standard sizes (for nominal widths between 600mm and 1800mm) and Super sizes (for nominal widths between 2100mm and 3600mm) in length of 1 metre as show in table 1, 2 and 3. API Box Culverts are available both with and without Dry Weather flow (DWF) sections.

DESIGN CONSIDERATIONS:

1. Design Loading requirements for API Box Culverts are in accordance with
  (a) B5 5400: Part 2 modified by (b),
  (b) Departmental Standard BD 31/B7 – Buried Concrete Box Type Structure issued by Departmental of Transport (UK) – Highway and Traffic,
  (c) JKR LTAL (Long Term Axle Load) and SV (Special Vehicle) requirements.
2. Reinforced concrete design in accordance with BS 5400: Part 4.
   
Concrete characteristic strength at 28 days, fcu = 40MPa
Concrete cover to reinforcement for: - Standard Size Box Culvert = 25mm.
Concrete cover to reinforcement for: - Super Size Box Culverts = 30mm.

SOIL PARAMETERS USED IN THE DESIGN:

1. Coefficient of the earth lateral pressure at rest = 0.5 bulk density of the soil = 19kN/m³
2. API Standard Size Box Culverts (not exceeding 1800mm width and height) are designed to cater for backfill superimposed dead load not exceeding 2m depth (inclusive of pavement) plus 45 unit of HB vehicle primary live loads.
3. API Super Size Box Culverts (exceeding 1800mm width & height) are designed to cater for backfill superimposed dead load to required standard backfill (inclusive of pavement) plus 45 unit of HB vehicle primary live loads.
4. API Standard Size Box Culverts also comply with proof test load of 112.5kN over an area of 320mm x 320mm placed at any position on the Culvert Lid.
5. Hydrostatic pressure is eliminated by the provision of 50mm diameter weepholes placed along the centreline of the invert wall.
6. The backfill material adjacent to wall should be granular type of soil for better drainability.

HANDLING

Lifting holes (weepholes) are provided at the box culverts invert wall and lifting hooks are provided at both ends of the lid for handling. It is recommended that a spreadex beans to be used when slinging the inverts to avoid cracking at the wall base joint.

JOINTING

API Box Culverts are supplied with plain butt joints. Cement mortar is normally used to fill the gap between box culverts.

LAYING PROCEDURE

API Box Culverts should be laid on the prepared bedding (preferable compacted sand bedding). However, in bad ground, if may be necessary to excavate deeper or provide piled foundation and place a layer of hardcore before placing the sand bedding. Backfilling around culvert units should be done after the lid of the culvert has been installed and it should be carried out in even layers on both sides simultaneously.

Is is our policy to continuously review and improve products and their design.
Information in this webpage is therefore subject to change without prior notice.
 
 
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API was accredited with SIRIM Product Certification for its Box Culvert in December 1999 and the Quality System MS ISO 9002 by SIRIM in February 2001.
The upgrading of the Quality System to MS ISO 9001:2000 was successfully implemented in 2003.
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