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SECT 

 

|  V1  |  INSTALLATION MANUAL  |  202102 

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SCHLETTER SOLAR GMBH  |  SUBJECT TO CHANGES 

4. INSTALLATION USING ROOF SCREWS 

SECT can be installed using roof screws that fix into purlins. Use the product code SPCF01 

(SECT Channel Foot 01), to suit standard 14g roof screws. 

 

 

 

 

 

 

 

 

The channel foot is supplied with an EPDM mat fixed to the base. The EPDM mat prevents 

water ingress. The leak path is the annular gap between the roof sheet and the roof screw. This 

is sealed by the thick EPDM washer located between the L-foot and the roof sheet. As the roof 

screw is tightened the base of the channel foot presses down on the EPDM, causing the EPDM 

to bulge inwards and press tightly around the roof screw, thus creating the waterproof seal. 

The EPDM mat also provides a level of separation from the roof sheet, and corrosion protection for 

the roof sheet. According to the BlueScope technical bulletin CTB-12 (Rev 3, November 2003) on 

dissimilar metals, aluminium accessories are compatible with all common roofing materials, 

including galvanized iron, Zincalume and Colorbond. Therefore, the aluminium channel foot is 

permitted to directly contact the roof sheet. However, SECT recommends the use of the EPDM mat. 

 

Other considerations: 

 

Roof screws are not supplied. SECT recommends 14g fasteners (to replace the typical 12g roof 

screw) with a Class 4 anti-corrosion coating, as described in ISO 9223-2012 and AS 4312-2008.  

 

Channel should be extended past the last module frame to overlap the next available purlin. 

 

Always install channel feet on the roof crest, not in the pan. This eliminates the majority of 

the risk of water ingress. 

 

Timber purlins should be pre-drilled, especially old hardwood that is prone to splitting. 

 

The roof screw should be tightened in accordance with the installation manual for the roof 

sheet. The roof screw should not be over tightened – the roof sheet should not be 

deformed or crushed. 

 

The fixing capacity of the channel foot is limited by either the roof screw or purlin it is 

screwed into. The channel foot itself is not the limiting factor. Typically, the fixing capacity 

is in the range of 1-2 kN. 

SPCF01 with EPDM on the base 

Summary of Contents for SECT

Page 1: ...SECT INSTALLATION MANUAL SECT patent pending in flush north or east west variants...

Page 2: ...ptions 4 1 4 No reach installation 5 1 5 Types of roof fixings 5 2 LAYOUT AND ASSEMBLY 6 2 1 Fixing spacing 6 2 2 Length of column or row 6 2 3 Assembly 7 2 4 Joining channels 9 2 5 Earthing 9 3 INSTA...

Page 3: ...anning installation and commissioning of the solar power system must only be performed by qualified technical personnel Improper execution can result in damage to the system and premises and endanger...

Page 4: ...the same orientation also called north 0 tilt also called flush 1 2 Compliance and certification SECT is supplied with a generic certification that suits most buildings covering wind regions A B C ter...

Page 5: ...e Assembly occurs by sliding the far edge of the module into the C shaped profile then clamping at the near edge This way installers don t have to reach a meter over the module to tighten a fastener 1...

Page 6: ...to the roof sheet rib spacing However the purlin spacing needs to match the approved clamping zones defined by the module installation manual e g from 1000 to 1600 mm to fit the typical 10 25 clamping...

Page 7: ...cers 3 Position the first module then fix the module to the channel using two edge brackets 4 Slide the far edge of the first module into the C sections offered by the edge brackets then position two...

Page 8: ...ar using the same brackets Note that the edge brackets are always oriented so that the stainless steel clamp plate faces the module Assembly of SECT flush is even simpler using the SPFB 40 flush brack...

Page 9: ...ainless steel module clamp plates Each module is held using two clamps plates Each clamp plate has two sharp edges that penetrate the aluminium oxide layer on the frame of the solar module Thus if the...

Page 10: ...mps should be installed directly on top of the purlin i e on top of the concealed clip which holds the roof sheet to the purlin Channel should be extended past the last module frame to overlap the nex...

Page 11: ...e with all common roofing materials including galvanized iron Zincalume and Colorbond Therefore the aluminium channel foot is permitted to directly contact the roof sheet However SECT recommends the u...

Page 12: ...hole in the base to suit a M8 anchor 6 CABLE TRAYS 6 1 Cable trays on a sheet metal roof SECT channel and channel lid and channel feet can be used as an alternative to galvanized steel cable tray Chan...

Page 13: ...tray Fasteners are Masonry Torx Screw 7 5 mm diameter x 40 mm length part 1CCT1C407 5040 into a pre drilled 6 mm diameter hole 6 3 Cable trays on another channel Channel as cable tray can be fixed on...

Page 14: ...lectrical installation including DC cabling DC isolators inverter and AC cabling is conducted using standard solar PV installation methods and procedures The SECT frame is fabricated from mill finish...

Page 15: ...0 0 SCHLETTER SOLAR GMBH Alustrasse 1 83527 Kirchdorf GERMANY www schletter group com We reserve the right to changes including technical modification...

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