Flat bottom grain steel silos

PTSilosteel silos are designed according to the specifications and standards given below :

- Dynamic analysis of the silo structural system is done according to the seismic and soil conditions of the area which the silos will be installed
- Snow load is calculated according to conditions of the area which the silos will be installed.
- Wind load is calculated according to the height of the silo especially for the empty case of silo.
- Static and dynamical analysis of the silo is done for the case of 25°C temperature change
- Static and dynamical analysis of the silo is done according to the vertical and horizontal load of grain
- After the designing with CAD-CAM programs, the silos are manufactured with CNC controlled machines, quality control is done by the quality control department.

Standard Silo Design Parameters :
- Euro Code 3 (EN 1993-4-1:2007) Part 4.1 & DIN 1055-6 + 18914
- ANSI/ASAE EP433 / 2001 & ANSI/ASAE EP545 / 2000
Seismic Design : UBC 4 Seismic standard (Aº=0.35)
Wind Velocity : 175 Km/hr
Wind Load : 125 Km/hr
Design roof load for dead load plus snow load : 150 Kg/m2
Grain Products to be Stored : Wheat bulk density ; 800 Kg/m³
Corn bulk density ; 720 Kg/m³
Rice bulk density ; 640 Kg/m³

The PTSilo galvanized steel silos are produced by advanced technology and designed to respond all types of grain storage.

The advantages of Flat Bottom Steel silos:
- Lower investment costs.
- Lower erection costs.
- Shorter implementation time.

Entirely modular silo equipment's provides to disassemble and move the facility to another site and/or to enlarge

SILO SIDEWALL STEEL PLATES:

High quality and extremely strong materials are used during the production process of the silos.
Galvanized structural steel plates used in the production of the silos are able to withstand strength
450 MPa(4590 Kg/cm²).

All 3.0mm - 1.2mm thickness silo side-wall plates have EN 10326/10143standard and S350GD + Z450 quality structural steel has the following features;

Yield strength ; 350MPa minimum
Tensile strength ;450 MPa minimum
Elongation in 50 mm ; 12% minimum:

All sidewall sheets have 943 mm vertical coverage and 2871mm horizontal coverage.
Narrow corrugated form is given to the silo side wall platesfor the pressure to be the most resistant.
Corrugation profile has 82.00 mm pitch and 12.10 mm depth.
On taller silos, PTSILO uses two sidewall panels laminated (double layer) together for greater strength.
The corrugated sidewall sheets are engineered for fast erection..

Zinc coating amount on the steel, is increased to guarantee the protection against inner friction and all outer natural effect.
Amount of zinc coating on the manufactured sidewall sheets, are determined according to the loading/unloading frequency and some natural events such as humidity, wind and sandstorm of the place where silo is to be built.
Special galvanize plating is used for superior corrosion resistance, the standard galvanized plating of the sheets are (G-90) 275 gr/m2, (G-115) 350 gr/m2 and (G-140) 450 gr/m2 zinc coating according to the customer's request.

Durable bolts ensure a long life for PTSILO products.
Galvanized coated, Grade 8.8 and 10.9 fasteners used both on sidewall and stiffener columns.
Special paste is used in all silo body sheets and upper cone connection points in order to obtain full airtight and full waterproof.Thanks to bonded washer and strip caulking, efficiency on sealing is obtained.

Double bolts (triple or four on large diameter silos) are used for all sidewall sheets.

STIFFENER& SPLICES:

Silo strength is further maximized through the use of PTSilo's strong upright stiffener columns which carry the vertical load of the bin to the foundation.

Splices strengthens the structure of the silo which are manufactured from high strength 450 MPa steel and as large as stiffener's cross-sectional area

Stiffener &Splice thicknesses are manufactured from 2 mm to 8 mm according to the silostrength design.

Stiffeners are hot dip galvanized and mounted externally to silo sidewall steel plates.

Stiffener base plate is factory welded to bottom stiffeners providing durable bin/silo anchorage in order to resist lateral and uplift loads. Also it resists to earthquake loads.

SILO ROOF SYSTEM:

The PTSilo silo roof is one of the strongest silo roofs available.

PARS TURK SILO'sroof structure specially designed and manufactured by using high strength steel with 275 gr/m² zinc coating. It provides an excellent sealing by fully overlapped, strong structure. PTSILO's roofs are framed by sturdy beams.PTSILO standard roof models are custom designed roofs and they are manufactured according to bear the specific loads such as different snow and wind loads, temperature cables and handling equipment.

The inclination of the roof is 30 degrees which provides optimum filling of the silo. To reinforce the strength and durability of the roof of grain silos with wide diameters special sturdy cross section structural roof is used.

Steel Silo roof panels are designed over 4 (four) panels to provide high strength according to every side wall steel sheets and supported with high tonnage ridging.
The ridging are special manufactured with PTSILO's computer aided design (CAD) to present more safety and resistance production.

8.8 quality high strength galvanized bolts are used in all roof sheet connection places in order to obtain highest degree of durability of all PTSILO silos

There is one inspection- control cover on the roof of the silo.

SILO SIDEWALL& ROOF WIND RING
PTSILO wind rings are assembled on the silo body to provide stable structure to the silo during filling and discharge. During the discharge process, silo resists the pressure and stress of the sidewalls by the help
of these wind rings. This allows to usethe silo with confidence for many years.

PTSILO wind rings can also be used in the roof to strength the construction as used in the silo body sheets.

PTSILO wind rings are assembled on the silos according to the diameter of the silo, seismic zone and side discharge gates.

SILO ENTRANCE AND LADDER SYSTEM:

PTSILO outside ladders and roof ladders provide a safety on roof access. Spacing between sidewall ladder and sidewall, embossing on the ladder rungs are specially designed for safety and not to slide. Resting platforms are located at certain levels according to related standards. Inside ladders are also available for maintenance and the controls inside silo. PTSILO also offers circular stair and specially designed roof ladders with hand-rails and stairs optionally which are more comfortable and safe equipments. Meanwhile, inside ladders are also available.

PTSILO ladder and platforms are produced completely modular from galvanized sheets.
The holes; drilled to the strip sheet metals by CNC Punching Machine gives easiness to bolt assemble.
Both external and internal ladders can be assembled to the existing holes by using connection fittings.
The standard silo external ladder safety cage system enables people to reach the roof safely.

An eave platform can be installed below the manhole for your convenience when entering the bin or inspecting the roof. Access to the roof and the rest platform to observe from manhole are PTSILO's standard silo accessories.

STEEL SILO ACCESS SIDEWALL DOOR:
Silo access door is offered two pieces in each silo. First is utilized to access from roof when silo is loaded, other is located on second bottom ring for entering silo when silo is empty. Thanks to the inner cover of lower access-door; opening of the door is prevented when silo is loaded and safe usage is provided.

The sidewall door, which manufactured by PTSILO, is assembled to silo's bottom second ring has
Ø 64 cm diameter to make easy access into silo and also has door support panel.
The door is closed from double side with locking bars.

ROOF VENTS:
The roof vents are assembled to over the steel silo roof. The roof vents are designed to exclude outside the heated air from inside of the silo and also prevent from any foreign materials to come into the silo. The roof vents provides to exclude the air freely outside of the silo while the fans are working.
the facility.

PTSilo flat bottom type grain storage steel silos in different sizes are available, from 3.66 metersup to 32.00 meters (diameter), according to the storage capacity required by the Customer (from 25 m3 to 25.000 m3 of wheat or other kind of cereals).

PTSilo outer steel stiffened flat bottom silos and accessories are used worldwide.

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