About box culverts
Precast RCC box culvert, 300 to 2500 mm
Box Culvert Technical sheet
Reinforced precast RCC box culvert built for heavy-load cross-drainage under roads, highways, railways, and flood-prone infrastructure corridors.
- 01 Size range
- 300×300 mm to 2500×2500 mm
- 02 Unit length L
- 2000 / 1500 mm
- 03 Concrete grade
- M50–M75
- 04 Standard sizes
- 25
Where to use the precast box culvert
The Trilok Infratech box culvert is a closed precast RCC unit for cross-drainage under roads and railways, made in Surat, Gujarat. It is cast in M50–M75 concrete in 25 sizes from 300 × 300 mm to 2,500 × 2,500 mm, in 2,000 mm units (1,500 mm at 2,500 mm width), with plug & socket joints sealed by rubber gaskets.
Trilok's Precast RCC Box Culvert is made for cross-drainage beneath roads, railways, and flood-prone corridors. Cast offsite to exact specifications, it is craned into position on-site instead of being cast in place. From small access culverts to large highway-grade structures, we manufacture to the dimensions your project demands.
- F/01
Durable Material
Manufactured with M50 to M75 grade RCC and reinforcement steel.
- F/02
Efficient Design
Closed rectangular profile allows high-volume water passage while supporting road or rail traffic above.
- F/03
Dual Application
Used for cross-drainage under highways, railways, irrigation canals, and flood diversion channels.
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BC
Box Culvert
1200 × 1400 mm · L 2000 mm
Casting 3D model…
Box culvert sizes and dimensions
All dimensions in mm, transcribed from the published tables. Hover or focus a column letter to see what it measures.
T/01 · 25 rows · mm
Typical Joint Details - Dimension Table
| B × H: nominal size = inner clear width B × inner clear height H of the opening, in mm. | Inner clear width (span) of the opening, between the inside faces of the two side walls (front view). | Overall outer width of the box across both side walls (front view). | Inner clear height of the opening, between the top and bottom slabs (front view). | Overall outer height of the box across both slabs (front view). | Unit (laying) length of one precast segment along the barrel (side view). The L dimension line runs from the end face at the d1 end to the far end, so the small d1 projection appears to sit outside L. | Slab thickness: the top and bottom slabs are both labelled Ts in the front view. For 300 × 300 the table gives two values ("95/80"). | Side wall thickness: both side walls are labelled Tw in the front view. | Size of the internal corner haunch (45° chamfer at the inside corners of the opening), drawn with equal horizontal and vertical legs C in the front view. For 300 × 300 and 600 × 600 the table gives "C30 / R50" and "C50 / R80". | Small axial offset at one end of the unit in the side view, outside the L dimension; appears to be the projection of the plug (spigot) end of the plug & socket joint. | Small axial step at the opposite end in the side view; appears to be the depth of the socket recess that receives the next unit's plug. | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 300 × 300 | 300 | 416 | 300 | 475 | 2000 | 95/80 | 55 | C30 / R50 | — | — | 3D |
| 500 × 500 | 500 | 680 | 500 | 740 | 2000 | 120 | 90 | 50 | — | — | 3D |
| 600 × 600 | 600 | 775 | 600 | 860 | 2000 | 130 | 80 | C50 / R80 | — | — | 3D |
| 800 × 800 | 800 | 1060 | 800 | 1060 | 2000 | 130 | 130 | 100 | 60 | 60 | 3D |
| 600 × 1000 | 600 | 860 | 1000 | 1260 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 900 × 1000 | 900 | 1160 | 1000 | 1260 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1000 × 1000 | 1000 | 1260 | 1000 | 1260 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1200 × 1000 | 1200 | 1460 | 1000 | 1260 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1000 × 600 | 1000 | 1260 | 600 | 860 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 800 × 1400 | 800 | 1060 | 1400 | 1660 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 900 × 1400 | 900 | 1160 | 1400 | 1660 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1000 × 1400 | 1000 | 1260 | 1400 | 1660 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1200 × 1400 | 1200 | 1460 | 1400 | 1660 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1300 × 1400 | 1300 | 1560 | 1400 | 1700 | 2000 | 150 | 130 | 150 | 60 | 60 | 3D |
| 1500 × 1400 | 1500 | 1760 | 1400 | 1700 | 2000 | 150 | 130 | 150 | 60 | 60 | 3D |
| 1400 × 1000 | 1400 | 1660 | 1000 | 1260 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 1400 × 1200 | 1400 | 1660 | 1200 | 1460 | 2000 | 130 | 130 | 150 | 60 | 60 | 3D |
| 2000 × 1200 | 2000 | 2320 | 1200 | 1560 | 2000 | 180 | 160 | 200 | 80 | 80 | 3D |
| 2000 × 1500 | 2000 | 2320 | 1500 | 1860 | 2000 | 180 | 160 | 200 | 80 | 80 | 3D |
| 2000 × 1800 | 2000 | 2320 | 1800 | 2160 | 2000 | 180 | 160 | 200 | 80 | 80 | 3D |
| 2000 × 2000 | 2000 | 2320 | 2000 | 2360 | 2000 | 180 | 160 | 200 | 80 | 80 | 3D |
| 2500 × 1500 | 2500 | 2900 | 1500 | 1940 | 1500 | 220 | 200 | 200 | 80 | 80 | 3D |
| 2500 × 1800 | 2500 | 2900 | 1800 | 2240 | 1500 | 220 | 200 | 200 | 80 | 80 | 3D |
| 2500 × 2000 | 2500 | 2900 | 2000 | 2440 | 1500 | 220 | 200 | 200 | 80 | 80 | 3D |
| 2500 × 2500 | 2500 | 2900 | 2500 | 2940 | 1500 | 220 | 200 | 200 | 80 | 80 | 3D |
Note All dimensions in mm. Joint: Plug & Socket Joint; Flange Bolt Connection (available for selected sizes); Sealing Material - Rubber Gasket.
Last updated:
T/02 · 4 rows · mmNot in the standard range · confirm availability
Additional sizes
| B × H: nominal size = inner clear width B × inner clear height H of the opening, in mm. | Inner clear width (span) of the opening, between the inside faces of the two side walls (front view). | Overall outer width of the box across both side walls (front view). | Inner clear height of the opening, between the top and bottom slabs (front view). | Overall outer height of the box across both slabs (front view). | Unit (laying) length of one precast segment along the barrel (side view). The L dimension line runs from the end face at the d1 end to the far end, so the small d1 projection appears to sit outside L. | Slab thickness: the top and bottom slabs are both labelled Ts in the front view. For 300 × 300 the table gives two values ("95/80"). | Side wall thickness: both side walls are labelled Tw in the front view. | Size of the internal corner haunch (45° chamfer at the inside corners of the opening), drawn with equal horizontal and vertical legs C in the front view. For 300 × 300 and 600 × 600 the table gives "C30 / R50" and "C50 / R80". | Small axial offset at one end of the unit in the side view, outside the L dimension; appears to be the projection of the plug (spigot) end of the plug & socket joint. | Small axial step at the opposite end in the side view; appears to be the depth of the socket recess that receives the next unit's plug. |
|---|---|---|---|---|---|---|---|---|---|---|
| 900 × 900 | 900 | 1120 | 900 | 1160 | 2000 | 130 | 110 | 150 | 60 | 55 |
| 1200 × 1200 | 1200 | 1460 | 1200 | 1500 | 2000 | 150 | 130 | 50 | 60 | 55 |
| 1500 × 1500 | 1500 | 1760 | 1500 | 1800 | 2000 | 150 | 130 | 150 | 60 | 55 |
| 3000 × 3000 | 3000 | 3440 | 3000 | 3480 | 1000 | 240 | 220 | 300 | 60 | 55 |
Note All dimensions in mm. Customized sizes available for mass quantity.
Last updated:
T/03 · 3 rows · mm
Typical Foundation Details
| Inner clear width (span) of the opening, between the inside faces of the two side walls (front view). | Foundation concrete thickness under the box (typical foundation detail). The drawing also shows a 20 mm bedding mortar layer between the box and the foundation concrete. | Crushed stone layer thickness beneath the foundation concrete (typical foundation detail). |
|---|---|---|
| 600 ~ 1000 | 100 | 150 |
| 1100 ~ 2000 | 150 | 200 |
| 2200 ~ 3000 | 200 | 250 |
Note All dimensions in mm. The box sits on 20 mm bedding mortar over foundation concrete (t1) and crushed stone (t2); foundation width B2 = B1 + 100 mm each side.
Last updated:
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- Box culverts
Box culvert technical drawings
6 sheets. Open any sheet to zoom into the details.
Our proven workflow
- Step 1
Design and planning
- Step 2
Precision machining
- Step 3
Final Inspection & dispatch
Box culvert FAQ
Size range: 300×300 mm to 2500×2500 mm. The dimension table lists 25 standard sizes (mm), including 300 × 300, 500 × 500, 600 × 600, 800 × 800, 600 × 1000, 900 × 1000, 1000 × 1000, 1200 × 1000, 1000 × 600, 800 × 1400, 900 × 1400, 1000 × 1400, 1200 × 1400, 1300 × 1400 and 11 more.
It depends on the size: L = 2000 mm for 21 sizes (300 × 300 … 2000 × 2000) and L = 1500 mm for 4 sizes (2500 × 1500 … 2500 × 2500).
M50–M75 grade concrete.
Typical applications: Storm water drains; Power ducts; Road crossings; Replacement of pipe culverts.
Call +91 95104 39933, email sales@trilokinfratech.com, or send the enquiry form on this website with the products, sizes and quantities you need.
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