DBV Rainscreen Facade Product Technical Guide
RAIL FASTENERS
Rail fasteners are the components that connect or anchor the various parts of the substructure mechanically .
These fasteners must comply with national regulations or approval requirements as well as the manufacturer ‘ s specifications . The intended purpose and applicable approval must cover rainscreen facade applications . In addition , corrosion protection measures must be implemented and attention must be paid to the compatibility of materials with each other .
Fasteners may be of the following types :
For metal substructures : Screws ( e . g . S-AD ) or rivets
For wood substructures : Screws may be used .
VERTICAL RAIL FASTENERS
• The connection between the rails and the bracket are made with self-drilling screws ( stainless 304 or 316 ), using fixed or sliding points .
• The fixed point takes the weight of the cladding material and substructure and the proportional wind load .
• The sliding points allow temperature expansion of the rails and bear the proportional wind loads .
• Special screws ( e . g . S-AD 01 S / SS 5.5 x L ) are needed for this application ( geometry and thread ).
Sliding point : Screws positioned in the hole slot
Fixed point : Screws positioned in the round holes
• Sliding point ( flexible point ): The screws must be positioned in the slots .
• The sliding points allow expansion of the profiles ( 0.04 " per linear foot for 315 ° F ).
• Fixed point : The screws must be positioned in the round holes to avoid vertical movement . This allows the bracket to carry the dead load of the panel / cladding material and the horizontal wind loads .
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