Tunnel Form is a system that allows the casting of walls and slabs in one operation on a daily cycle. Construction durations are significantly reduced by this rapid system when compared to conventional methods.

The Tunnel Form System brings speed, quality, and accuracy to concrete construction and provides significant savings in finishing and M&E works. Hightech technologies for steel formwork production make tunnel forms strong and durable.

The system creates efficient load-bearing structures, which are known to be the most earthquake-resistant structures.

Longest Lifetime: Hi-tech steel system provides durability and strength. The service life of the ERTF Modular Tunnel Form System is good for 500 reuses as long as the system is used properly in accordance with instructions.

Surface Quality: Steel panel surfaces provide a smooth concrete finish. Together with dimensional accuracy, these features of the system eliminate finishing works like cement plastering.

Work Safety: The Tunnel Form System offers the highest jobsite safety due to full perimeter platform systems.

All panels forming the ERTF Modular Tunnel Formwork System are made of sheet metal that will be exposed to concrete, which is 3 mm thick THRU type 3244 (S275) steel produced by Ereğli Iron and Steel Factories Co. Inc.

The tunnel formwork is manufactured to withstand a strength of 80 kN/m² of concrete pressure. Support profiles such as box profiles (50x60x2 mm) and U profiles (30x60x4 mm) placed on the back surfaces of the panels provide this strength.

The ERTF Modular Tunnel Formwork System can be easily used in different projects due to the adapter panel structure in the horizontal and vertical axes.

Almost all (approximately 90%) of the connection elements belonging to the ERTF Modular Tunnel System are made of standard materials. Since the connection elements are standard products, their procurement is easy and cost-effective when needed over time.

Easy Adjustment with Telescopic Push-Pull Props: Standard push-pull props can be used for every tunnel dimension due to their telescopic nature. ERTF pushpull props make it very easy to adjust vertical and horizontal leveling. Lift up the control arm and move the horizontal panel until it is leveled. Once the arm is locked, the tunnel is properly adjusted.

Easy Stripping with Rollers: ERTF half tunnels can easily be moved and stripped out with the help of rollers, which are used instead of wheels. Rollers are placed under the vertical panels.

Elevated Bottom Tie-Rod Level for Higher Kicker Concrete: High kickers make it easier to adjust tunnel heights, which eliminates leveling mistakes of the foundation.

Telescopic Extension Tunnel Legs for Non-Typical Floors: ERFT modular tunnel formwork can be used on non-typical floors with higher floor levels with the help of telescopic extension legs mounted on the inner vertical panels. Such floors can be cast in two steps easily by elevating tunnel forms on the legs for the second casting.

Stripping Platform Extension Leg For Non-Typical Floors: ERFT stripping platforms can be easily used on non-typical floors with higher floor levels with the help of the extended triangle leg of the platform.