FAQ

Its reinforced concrete 3D truss casted under presdure into a disposable PE formwork under water.
Consist of original nodes [fittings] and beams [PE tubes].

We sell technology. In a narrow sense, we only sell fittings = connecting nodes of the 3D truss. Beams are made from standard plumbing pipes and fittings; concrete, rebar and microfiber are also common products and purchased separately.

An empty formwork is assembled on the shore, and later is moved to site [into aquatoria] by a crane or barge. A concrete pipe [or a trunk] must be connected to one of the flanges [5½" groovelock] in advance. Concreting is carried out under water.

Concrete has a density of about 1800 kg/m3 and can displace water from the formwork if concreting is carried out "from bottom to top" and with some overflow. Accordingly, the concrete pipeline must be connected to the bottom point of the structure.

Floats for a while if composite reinforcement is used. Sinks immediately if steel reinforcement is used. Steel rebar has better load performance, but greatly reduce lifespan of 3D truss.

Beams reinforced by rebar assemblies in advance. Rebar placed inside pipes during formwork assembly. An empty formwork with rebar inside the pipes is concreted on site.

All HYDRANTULA designs are scalable. They don't have a fixed 3D cell size, is there only a constant aspect ratio.
The final dimensions are chosen by the customer, according to their needs and the characteristics of the site.

It is possible to use the vertical [load-bearing] columns as conductors for screw piles. However, a proprietary feature of HYDRANTULA structures is the possibility of their installation on the bottom soil in the FreeStand mode - on own sleds, without a firm connection with the sea bottom.

The H1 series design includes "height-adjustable" lower columns. The designs of the H2 series also adapt to the slope. For rest series, it is possible to recoup the slopes with the upper deck-screw.

Designs of the H3 [15 meters], H4 [6m], H5 Series [8...12m], as well as H2 [5 m] can be made in 2 or three storeys. This allows them to be used at the maximum depths indicated above. Н1 is only single storey series of Hydrantula.

At least 2x. With proper reinforcement of the formwork - 3x. Except H1 series!

No more than 15% of the total (final) weight. With composite rebar used it often keep afloat.

It depends on the availability of barges suitable for transporting and launching empty formwork, as well as for placing a concrete pump and cuvet with fresh concrete.
Limiting factor is that the depth at the installation site should be less than the maximum permissible. When casting from the shore, the length of the concrete pipeline is usually limited to 70 meters.

The structures are NOT designed for the ice flow of Arctic rivers. Freezing in sea bay or lake waters does not harm them

Butt/socket welding, "on the bell", binary sockets, fixtures, fasteners.

Butt/socket welding of PE pipes can be performed by plumbers engaged in work on outdoor PE pipelines. The rest of the work can be easily handled by any construction workers.

Drills, screwdrivers, cutters [crowns], hand extruders, end welders, circular saws.

Cranes, concrete pump, long-haul trucks.

The Archimedes force acting in water reduces the weight of fresh concrete by more than half [up to 800 kg/m3]. When using HYDRANTULA formwork on land, external reinforcement of inclined and horizontal beams (tubes) will be required.