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Symaga offers a wide range of accessories to meet customer requirements and cover all their grain storage needs.


Roof handrail

Ensuring the transit from roof inlet until the inspection door.

Technical Data: Roof handrail

Eave catwalk


Perimetral catwalk around eave, allowing the path around the eave. Option: exterior and interior.

Technical Data: Eave catwalk exterior

Technical Data: Eave catwalk interior

Eave handrail


It consists of a perimeter handrail and upper stiffeners support it. This item increases operator safety.

Technical Data: Eave handrail

Foam eave close

Symaga proposes a system consisting of FOAM, making the assembly easier.

Technical Data: Foam eave close

Metallic eave skirt


Metallic eave skirt avoiding water and snow entrance, made in galvanized steel.

Technical Data: Metallic eave skirt



Galvanized rail on the roof avoiding snow avalanches.

Technical Data: Anti-avalanche

Roof inspection door

Roof hole allowing the entrance to silo from the roof.

Technical Data: Roof inspection door

Semiautomatic gate

Allow opening from the ground.

Technical Data: Semiautomatic gate

Neumatic charge filling

Channel system with charge and decompression

pipe to fill the silos with air pressure.

Technical Data: Neumatic charge filling


Grain stopper system

This accessory avoid grain damage and breakage with deflector plates, as well grain disaggregation by weight or dust creation, thus minimizing explosion hazard.

Technical Data: Grain stopper system

Side discharge system

Sistema de descarga lateral

It empties the silo down to 70% of the capacity without energy spending or maintenance. Unloading could be performed to truck, train or conveyor.

Technical Data: Side discharge system

Inner flat lining


The inner flat sheets are a smooth lining to improve the flowing of the material and the cleanliness of the silo.

Technical Data: Inner flat lining

Anchorage system


We provide standard or metalic, chemical and expansive anchor bolts.

Technical Data: Anchorage system

Foundation sealing

Butylic paint and compound sealing the foundation.

Closing angle

Perimetral closing for silo with non-elevated inner slab.

Technical Data: Closing angle

Access door for heavy machinery

Installation at the bottom of the silo

Allow the entry of machinery inside the silo

Size: 2,4x3m,

Anchor plate to the floor and reinforcements

Lock system included

Galvanized finishing

Drip edge 

Double bodysheet access door

Double door for easier Access into the silo. Place in the first  and second rings. The inner door is divided into 3 sections to avoid grain leak. 

Technical Data: Double bodysheet access door

Slide gate for hopper silos outlet

Double door for easier Access into the silo. Place in the first  and second rings. The inner door is divided into 3 sections to avoid grain leak. 

Technical Data: Slide gate for hopper silos outlet

Supplementary structures



Our catwalks are modular, consequently adjustable to each project. Design is made according to UNE EN ISO 14122. Closed catwalk is available.

Technical Data: Catwalks, close and lattice


Columns and supports


We design supports according to the load out conveyor, snow load and the diameter of the silos. Symaga engineers columns and supports according to installation configuration, according to UNE EN ISO 1993 norm.

Technical Data: Column hot rolled and suppports


Conveyor support

Hot dip galvanized conveyor supports, with adjustable height.

Technical Data: Conveyor support

Roof supports


Galvanized supports on silo dome for conveyor.

Technical Data: Roof supports

Structure for delivery silo


Support structure for delivery silo with free total height of 5 metres for truck or train transit.

Technical Data: Structure for delivery silo

Platform between silos

Modular and galvanized structure tower designed to bear the total loads caused by elevators or similar machinery.

Technical Data: Platform between silos andladder

Maintenance Platform

Modular metallic structures of 700, 900 or 1100mm wide that adapted to the installation to ease the maintenance. Options on standard or tramex floor.

Technical Data: Maintenance Platform 

Elevator Tower

Easy-access elevator tower.

Technical Data: Elevator Tower


Ladder to roof

To get the roof of the silo by climbing up the cylinder wall. With a safety cage and intermediate rest platforms, according to the UNE EN ISO 14222-1/2/3/4:2002.

Technical Data: Ladder to roof

Ladder to access door in cylinder

Includes a support platform for handling the door and closing.

Technical Data: Ladder to access door in cylinder

Inside ladder

Roof stairway

Step-stair from the eave to the centre collar.

Technical Data: Roof stairs

Spiral stairway

Distributed spirally around the silo.

Technical Data: Spiral stairway

Zigzag stairway

We provide this stair in zigzag patterns facilitating the access to the top of the silo, to an elevator tower or to a work tower.

Technical Data: Zigzag stairway

Rest platforms

These platforms are included in each ladder to roof section.

Technical Data: Rest platforms

Additional systems

Temperature monitoring system

It allows the control of the temperature over stored material, controlling storing conditions. It is a passive system, which requires no maintenance. The probes can be replaced without emptying the silo, and are supported on two beams avoiding tensions in the roof. The system enables to monitor humidity and dust inside the silo. Our temperature monitoring system is ATEX certified.

Technical Data: Temperature monitoring system

Maximun and minimum level sensors

They may be supplied rotatite, pendular, capacitive or membrane type.

Technical Data: Maximun and minimum level sensors and supports

Venting system

venting system is based on polyamide bolt-nut system in sector joints which gives rise to a venting anti-explosions surface according to EN 14491 2012 norm and anti-explosions ATEX norm.

Technical Data: Venting system

Sweep augers

It is used to empty completely the flat bottom silo. Symaga offers industrial sweep augers with ATEX certification.

Technical Data: Sweep augers

Erection tools

Complete set of tools for silo mounting.

Technical Data: Erection tools

Aeration system

Aeration gutters system

Made up of foundation channels that are covered with special galvanized boxes, corrugated and multi-perforated covering between the 25% and the 30% of silo bottom. Channel may have shape of “Y”, “H”, “C” if silo is conical concrete bottom, or “T” if it is a hopper silo. Technical Data: Aeration gutters system

Full perforated floor

The fully perforated floor is supported by a floor galvanized steel structure. Perforations are of a diameter of 1 or 1.5 mm, depending on the stored grain. Brackets are made of hot dip galvanized steel, which allows a better airflow and therefore a better ventilation.

Technical Data: Full perforated floor

Inside perforated cone

Elevated cone made of galvanized steel inside the silo. The system avoids contact between the ground and grain, making civil works cheaper.

Technical Data: Inside perforated cone

Roof vent

With circular design preventing the accumulation of water, snow and rubbish and opposes less air resistance. It is easy-assembly, embossed, perfect-sealed with the roof section, and it comes with anti-bird net. It is prepared with a special sealing system for fumigation, and ready for the installation of an exhaust fan coil to avoid condensation.

Technical Data: Roof vent and roof vent for fumigation


Avaliable supply air fan, or exhaust fan. IE2 certification, ensuring energy efficiency.

Technical Data: CMR

Technical Data: CAS-

Extractor fans

Helicoidal fan on the roof as part of an aeration roof vent.

Technical Data: CAS fans  and HCDF-40-4T-0.25kW

Prefabricated gutters

Gutters are installed in silo foundation. This element is manufactured in 3 mm thickness galvanized steel, depending on installation characteristics (size, width and depth of the silo and foundation, and the total volume of the stored grain). “Y”, “H” and “C” types available.

Hopper aeration system

Aeration cannel system with drillings, fixed to a Hopper sector and prepared for conexión with the fan.

Technical Data: Hopper aeration system

Grain Chiller

Improve grain preservation, avoiding fumigation. Minimize weight loss. Allows cooling regardless of environmental conditions.

Technical Data: Grain Chiller

External finishes

Silo lining

The outer lining adds extra protection against corrosion and provides extra insulation. It is available for roof, cylinder and hopper, in different colours (white, green and blue).

Technical Data: Roof lining

Technical Data: Cylinder lining

Technical Data: Hopper lining

Pre-lacquered roof

Roof galvanized steel S280GD+Z225 GS sector are previously pre-lacquered with 25/7 µm polyester. Available in white, green and blue.

Technical Data: Pre-lacquered roof

Paint polyester powder

Coating with polyester resins. Minimum thickness applied 80 μm each side. Thickness and color RAL on demand. Food use painting in option.

Technical Data: Pain polyster powder