Surat, Gujarat · India · Since 2005
Monday – Saturday, 9:00 – 18:00 IST info@trilokinfratech.com +91 95104 39933
— Drainage & crossings

Storm water and ducts,
carried in precast.

A precast FT-Flume for storm water drains, power ducts and road crossings — laid as a replacement of pipe culverts, with a smooth bore and a groove joint at every 2 m length.

M50–M75 concrete Open storm water drain Smooth-bore 2 m lengths
Specifications
Profile
FT-Flume
Use
Storm water & ducts
Concrete
M50–M75
Length
2000 mm
FT-Flume Precast U-Drain

The product

The FT-Flume is a precast open channel for storm water drains, power ducts and road crossings — laid as a replacement of pipe culverts. Each 2 m unit is cast, cured and tested in our Surat yard, then set on a prepared bed and jointed in line.

With heights from 900 mm to 1800 mm and widths from 600 mm to 2000 mm, the section is matched to the flow or the services it has to carry, and its smooth bore keeps water moving and silt from settling.

Why precast

A pipe culvert or an in-situ channel means formwork, curing time and a long open cut. A precast flume arrives finished, sets on a levelled bed and is jointed as it goes — a sealed, smooth channel with far less time on site.

Where it's used

It carries storm water drains, power ducts and road crossings — and replaces pipe culverts wherever an open precast channel is the better fit.

A finished channel, set on a prepared bed — not a trench waiting to be poured.
— Applications

Where it goes to work

Storm water drains Power ducts Road crossings Pipe culvert replacement
— Why it holds up

Open channel, finished in the yard.

A precast flume sized to the flow — for storm water, power ducts and road crossings.
01

Fast, even flow

The open section keeps storm water moving cleanly along the line.

02

Silt-free bore

A smooth precast finish stops silt settling and choking the flow.

03

Replaces pipe culverts

A wide open section in place of a pipe culvert — for storm water, power ducts and road crossings.

— Specifications

Engineering specifications

Standard FT-Flume sections — for storm water drains, power ducts and road crossings, as a replacement of pipe culverts. Designed for a live load of 1 T/m² (10 kN/m²). Customized sizes available for mass quantity.

Front view, side view and installation.

All dimensions in mm. Each height (H) comes in the range of channel widths (B) shown; B1, C and D vary with the chosen section.

H = 900 · H1 = 995
Width B (mm) 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800
B1 780 880 980 1080 1180 1280 1380 1480 1580 1680 1780 1880 1980
C 465 565 665 765 865 965 1065 1165 1265 1365 1465 1565 1665
D 740 840 940 1040 1140 1240 1340 1440 1540 1640 1740 1840 1940
FT-Flume Precast U-Drain — Sections Open storm water drain section (live load 1 T/m²) · front view · side view L = 2000 · groove for joint
Sections · Open storm water drain section (live load 1 T/m²) · front view · side view L = 2000 · groove for joint

H = 1000

H = 1000 · H1 = 1105
Width B (mm) 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 780 880 980 1080 1180 1280 1380 1480 1580 1680 1780 1880 1980 2080 2180
C 465 550 650 750 850 950 1050 1150 1250 1350 1450 1550 1650 1750 1850
D 740 840 940 1040 1140 1240 1340 1440 1540 1640 1740 1840 1940 2040 2140

H = 1200

H = 1200 · H1 = 1310
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 980 1080 1180 1280 1380 1480 1580 1680 1780 1880 1980 2080 2180
C 620 720 820 920 1020 1120 1220 1320 1420 1520 1620 1720 1820
D 940 1040 1140 1240 1340 1440 1540 1640 1740 1840 1940 2040 2140

H = 1300

H = 1300 · H1 = 1420
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
C 605 705 805 905 1005 1120 1205 1305 1405 1505 1605 1705 1805
D 960 1060 1160 1260 1340 1460 1560 1660 1760 1860 1960 2060 2160

H = 1400

H = 1400 · H1 = 1530
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
C 590 690 790 890 990 1090 1190 1290 1390 1460 1600 1690 1790
D 960 1060 1160 1260 1360 1460 1560 1660 1760 1860 1960 2060 2160

H = 1500

H = 1500 · H1 = 1640
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
C 590 675 775 875 975 1075 1175 1275 1375 1475 1575 1675 1775
D 960 1060 1160 1260 1360 1460 1560 1660 1760 1860 1960 2060 2160

H = 1600

H = 1600 · H1 = 1740
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
C 560 660 760 860 960 1060 1160 1280 1360 1460 1560 1660 1760
D 960 1060 1160 1260 1360 1460 1560 1660 1760 1860 1960 2060 2160

H = 1800

H = 1800 · H1 = 1940
Width B (mm) 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
B1 1070 1170 1270 1370 1470 1570 1670 1800 1870 1970 2070 2170 2270
C 530 630 730 830 930 1030 1130 1250 1330 1430 1560 1630 1730
D 990 1090 1190 1290 1390 1490 1590 1720 1790 1890 2030 2090 2190

Typical section as an open storm water drain.

The flume sits on a crushed stone foundation with levelling concrete and levelling mortar, and a filter sheet against the soil.

mm
Live load
1 T/m² (10 kN/m²)
Excavation side slopes
1:0.5 / 1:0.3
Working space
300 mm each side
Foundation
Crushed stone foundation
Bedding
Levelling concrete and levelling mortar
Filter
Filter sheet
Joint
Groove for joint
Unit length
L = 2000 mm

Sheet 10

mm

Customized sizes available for mass quantity. Send us a drawing and we'll cast to your exact section, length and capacity.

— FAQ

About the FT-Flume.

Common questions on capacity, sizing and laying. For anything project-specific, send us your drawing.

01What is the FT-Flume used for?

Storm water drains, power ducts and road crossings, as a replacement of pipe culverts. It is laid as an open precast channel in 2 m lengths.

02What load and grade is it designed for?

High-performance concrete from M50 to M75, RCC reinforced, designed for a live load of 1 T/m² (10 kN/m²) as an open storm water drain, and cast to IS standards.

03What sizes are available?

Heights (H) from 900 mm to 1800 mm. Widths (B) run 600–1800 mm at H 900, 600–2000 mm at H 1000, and 800–2000 mm for H 1200 to 1800. B1, C and D vary with the chosen height and width.

04Why precast instead of an in-situ channel?

A sealed precast line with a hard, smooth bore resists the seepage and silting of an earthen or in-situ channel, and it arrives finished — no formwork or curing on site.

05How is it bedded and jointed?

It sits on a crushed stone foundation with levelling concrete and levelling mortar, with a filter sheet against the soil, excavation side slopes of about 1:0.5 or 1:0.3 and 300 mm working space each side. Units joint with a groove for joint.

06Can you cast a custom capacity?

Yes — customized sizes are available for mass quantity. Send a drawing with the section, length and capacity and we'll cast to your exact spec.

— The range

Other precast lines

01 Drainage T25 U-Shape Drain (Heavy)

U-Drain Heavy (T25)

Heavy-duty precast U-drain with a load carrying capacity of 5 T wheel load — for storm water drains and power and telecommunication cable ducts where traffic runs over the channel.

M50–M75 concrete 5 T wheel load Smooth-bore RCC
Heavy-duty drainage · 5 T wheel load
02 Drainage T6 U-Shape Drain (Light)

U-Drain Light (T6)

Light precast U-drain (T6) for storm water drains and power and telecommunication cable ducts on footpaths, plazas and low-traffic streets — the same sealed, smooth bore in a leaner section.

M50–M75 concrete T6 section Smooth-bore Flush finish
Light-duty drainage
03 Crossings Box Culvert

Box Culvert

RCC box culverts for storm water drains, power ducts and road crossings, as a replacement of pipe culverts. Single or twin cell, sized to the load and dropped straight into the trench.

RCC M50–M75 Single / twin cell IRC loading Plug & socket
Crossings & cross-drainage
04 Retaining Earth Retaining Wall

Earth Retaining Wall

Modular precast retaining systems that prevent soil erosion, retain the soil near culverts, underpasses and bridges, and stabilise sloped ground. Interlocking units stack quickly and carry load from day one.

L-type Modular M50–M75 concrete Fair-face
Embankments & slopes
All products
Start a conversation

Need FT-Flumes?

Send us your specifications and quantities. We'll come back with grades, lead times and a quote — usually within two working days.

See where it's used
+91 95104 39933 info@trilokinfratech.com