Solar-field DP325Technical manual for photovoltaic free-fields with double pile foundations

1. Double pile support system for free-fields

The double pile support system for free-fields is made from galvanized steel. The quality of the steel finish has a minimum coating of hot dip galvanization 45 microns. The purlins can be either from aluminium or galvanized steel. All of the steel accessories (bolts, nuts, etc...) are made from stainless steel A2.

The system is available in 2 versions, 2 portrait & 3 landscape with angles of 25°,30°,35°.

The foundation of the system can be made with steel driven piles or with concrete piles.

Typology Purlin PV panel layout Code

Double Pile 25°

Aluminium Portrait DAP-25

Aluminium Landscape DAL-25

Galv. Steel Portrait DGP-25

Galv. Steel Landscape DGL-25

Double Pile 30°

Aluminium Portrait DAP-30

Aluminium Landscape DAL-30

Galv. Steel Portrait DGP-30

Galv. Steel Landscape DGL-30

Double Pile 35°

Aluminium Portrait DAP-35

Aluminium Landscape DAL-35

Galv. Steel Portrait DGP-35

Galv. Steel Landscape DGL-35

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1.1 GENERAL

2. Assembly of support system

The individual parts for assembling the support system are provided with the necessary machining for easier and faster installation.

Pile driving should be performed by specialist, and should be according to the installation specifications and drawings.

The piles should be placed with the large surface area parallel to the North-South axis.

The depth of the foundation is determined by the soil conditions and may vary for reinforced concrete.

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2.1 PILE FOUNDATION

Depth of foundation

Depth of foundation

Pile Foundation Concrete Foundation

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2.2 INSTALLING THE GIRDER CONNECTOR

The girder connector is fastened inside the web of the pile with stainless steel fasteners M10x25 on each side and safety nuts M10.

The girder beam is fastened over the top of the girder connector with two fasteners M10x25 and safety nuts M10.

Girder Connector

Safety nutM10

FastenerΜ 10x25

Pile

2.3 INSTALLING THE GIRDER

GirderConnector

Safety nutsM10

FastenerΜ 10x25

GirderBeam

Pile

4

3. Installing and aligning the support structure

The piles are placed in rows and are spaced at a maximum distance of 3,25 meters.

If needed the girders can be adjusted in order to insure the correct alignment.

The following adjustments can be made:

The girder connector can be adjusted in the vertical direction +/- 2cm

The girder beam can be adjusted in the horizontal direction +/- 2cm

3.1 ADJUSTMENTS

Girder connector

Steel fastener for girder beam Girder beam

Screw fastener for girder connector

Drawing Description

Fastener Μ 10x25 56 Nm

Torque

3,25m

3,25m

3.3 TABLE FOR FASTENER TORQUE

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4. Installing purlinsTwo types of purlins are available:

Ÿ Aluminium purlin ( SolarPrime)

Ÿ Steel purlin ( FUS62 )

The aluminium purlin (Solar Prime) is fastened to the steel girder beam with the corner clamp connector that is inserted into the channel on the side of the purlin and then it is fastened with an allen screw and a safety nut M8 to the girder beam.

4.1 ALUMINIUM PURLIN ( SolarPrime )

Girder beam

Safety nutM8

Corner clampconnector

Allen screw M8x30

Aluminiumpurlin

When the purlin is used continuously to span over several girders, then a special purlin connector is used to fasten the two purlins together. The purlin connector is inserted into the chamber of the purlin and fastened with self-tapping stainless steel screws.

Aluminium purlin connector

PurlinScrew St4,2x13

4.1.1 PURLIN CONNECTOR

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For connecting the steel purlin (FUS62) to the girder beam, use an allen screw M12x30 and M12 washer with safety nut M12.

4.2 STEEL PURLIN ( FUS62 )

Allen screw M12x30

Girderbeam

Safety nutM12

Steelpurlin

When the purlin is used continuously to span over several girders, then a special purlin connector is used to fasten the two purlins together. The purlin connector is fastened to the under side of the purlin with four allen screws M12x30 and washers M12. Safety nuts are not required as the connector has been threaded to directly receive the M12 bolts.

4.2.1 PURLIN CONNECTOR

Allen screw M12x30

Steelpurlin

Steel purlinconnector

Washer M12

Washer M12

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5. Installing the panelsThe panels are fixed to the purlins with special clamps. There are end clamps that are used to fix the panels at the beginning and the end of a series, and there are middle clamps that are used between two panels.

The clamps are available pre-assembled (with allen screw, spring, plastic grip, hammer-head nut) and are availble for every panel thickness.

The hammer head nut is inserted into the channel of the purlin and turned to lock into the desired position.

Then the clamp is fastened into place with the allen screw.

Hammer head nut

Clamp

Allen screw

8

F

L

L/2

1- point load

FF

L

L/3 L/3

2- point load

q

L

2 supports - Uniformly load

qL qL

L L

3 supports - Uniformly load

SolarFine 150

Height 150 mm

Width 41 mm

Perimeter 522,34 mm

Ix 4229,10 cm

Iy 425,71 cm

Wx 329,68 cm

Wy 312,54 cm

Radii(x) 5,06 cm

Radii(y) 1,70 cm

Area 2894,02 mm

Weight 2413,85 gr/m

6. Technical data sheets

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F (N)

L (m)

SolarFine 150

3-supports

2-supports

1 point load

2 point load

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SolarFine 100

Height 100 mm

Width 41 mm

Perimeter 422,34 mm

Ix 478,53 cm

Iy 418,79 cm

Wx 314,87 cm

Wy 39,17 cm

Radii(x) 3,32 cm

Radii(y) 1,62 cm

Area 2714,02 mm

Weight 1927,85 gr/m

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F (N)

L (m)

SolarFine 100

3-supports

2-supports

1 point load

2 point load

F

L

L/2

1- point load

FF

L

L/3 L/3

2- point load

q

L

2 supports - Uniformly load

qL qL

L L

3 supports - Uniformly load

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SolarPrime 105

Height 105 mm

Width 77,8 mm

Perimeter 490,32 mm

Ix 4107,81 cm

Iy 439,11 cm

Wx 318,24 cm

Wy 310,05 cm

Radii(x) 3,75 cm

Radii(y) 2,26 cm

Area 2768,05 mm

Weight 2073,72 gr/m

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L (m)

SolarPrime 105

3-supports

2-supports

1 point load

2 point load

F

L

L/2

1- point load

FF

L

L/3 L/3

2- point load

q

L

2 supportsUniformly load

qL qL

L L

3 supportsUniformly load

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SolarPrime 80

Height 80 mm

Width 77,8 mm

Perimeter 440,32 mm

Ix 453,90 cm

Iy 434,43 cm

Wx 312,00 cm

Wy 38,85 cm

Radii(x) 2,80 cm

Radii(y) 2,24 cm

Area 2688,05 mm

Weight 1857,72 gr/m

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SolarPrime 80

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1 point load

2 point load

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L

L/2

1- point load

FF

L

L/3 L/3

2- point load

q

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2 supportsUniformly load

qL qL

L L

3 supportsUniformly load

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FUS 62

Height 62 mm

Width 41 mm

Perimeter 365,19 mm

Ix 417,70 cm

Iy 412,90 cm

Wx 35,62 cm

Wy 36,29 cm

Area 2405 mm

Weight 3270 gr/m

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L (m)

FUS 62

3-supports

2-supports

1 point load

2 point load

F

L

L/2

1- point load

FF

L

L/3 L/3

2- point load

q

L

2 supports - Uniformly load

qL qL

L L

3 supports - Uniformly load

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7. Structural design loads of brackets

Load 1: Vertical compression (10kN)

Load 2: Horizontal forces (10kN)

Load 3: Vertical tensile forces (10kN)

10kN

10kN

10kN

1958, the beginning.2012, world-wide.

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The contents of this manual are subject to change without prior notice. Fischer Hellas Em

poriki EPE is not responsible for typographical errors. PLS012 05/2012